No help page available for: n

arc line files - VII.A CTIO Calibration Files (appendix) [index] arc line id figures - VII.A CTIO Calibration Files (appendix) [index] calibration files - VII.A CTIO Calibration Files (appendix) [index] default files - VII.A CTIO Calibration Files (appendix) [index] distortion correction - II.3.6 Mapping the distortions (2dfrutti) [index] distortion correction - II.3.6 Transforming images (2dfrutti) [index] extinction files - VII.A CTIO Calibration Files (appendix) [index] flux standard stars - VII.A CTIO Calibration Files (appendix) [index] help afiles - Describe the standard astrometry file format [astcat] help catalogs - Describe the astrometric catalog configuation file [xastcat] help catalogs - Describe the astrometric catalog configuation file [astcat] help catquery - Catalog and image survey API [xastcat] help ccsystems - Describe the supported celestial coordinate systems [astcat] help ccsystems - Describe the supported celestial coordinate systems [xastcat] help config - Print description of the configuration file format [photcal] help config - Print description of the configuration file format [xphotcal] help files - Describe the standard astrometry file format [xastcat] help pcintro - Print a short introduction to the photcal package [photcal] help pcintro - Print a short introduction to the xphotcal package [xphotcal] help surveys - Describe the image surveys configuation file [astcat] imtool formats - VII.I Using the Computers at CTIO (appendix) [index] imtool window - VII.F Using the Imtool Window (appendix) [index] manual help - VII.I Using the Computers at CTIO (appendix) [index] multihole files - VII.A CTIO Calibration Files (appendix) [index] nd filter curves - VII.A CTIO Calibration Files (appendix) [index] neutral density - II.3.12 ND Filter Corrections (2dfrutti) [index] neutral density - VII.A CTIO Calibration Files (appendix) [index] standard stars - VII.A CTIO Calibration Files (appendix) [index] suntool windows - VII.E Using the Suntool Windows (appendix) [index] telnet to US - VII.I Using the Computers at CTIO (appendix) [index] tfinder -- Search the catalog - predict, center and fit the coords [finder] tilde commands - VII.B Using the UNIX Mailer (appendix) [index] translation files - V3.3 Setting Up the Translation File(2dfrutti) [index] yd2p, yp2d - Convert between diode <--> pixel positions. [fos]

**Maybe one of these will help?**
Task	Description	Package
2dfrutti	- Reduction Manual for 2DFrutti Data	manuals
CTIO	- VII.A CTIO Calibration Files (appendix)	index
CTIO	- VII.I Using the Computers at CTIO (appendix)	index
SunView	- VII.I Using the Computers at CTIO (appendix)	index
aatrgo	- AAT-RGO spectrograph reduction	spec1
aatrgo	- AAT-RGO spectrograph reduction	spec2
abc	- Apply Barycentric Corrections to ROSAT event data.	rosat
absfity	- Smooth an FOS sensitivity curve.	y_calib
absfitz	- Generate a smooth sensitivity curve.	z_calib
abssenv	- Calculate digital absolute sensitivity.	hsp
absseny	- Compute an FOS sensitivity curve.	y_calib
abssenz	- Compute the absolute sensitivity ratio.	z_calib
abund	- Derive ionic abundances relative to H+ in 3-zone nebula	nebular
accelerators	- VII.I Using the Computers at CTIO (appendix)	index
access	- Determine the type or accessibility of a file	fio
access	- Test if a file exists	language
acoadd	- Image coaddition using Lucy Method with optional acceleration.	contrib
acs	- Tasks for calibrating ACS data.	hst_calib
addet	- add the E-terms to a pre IAU 1976 mean place	slalib
addmasks	- Combine several masks or bad pixel lists.	imgtools
addnewkeys	- Add new CALFOS keywords to FOS headers.	fos
addsets	- Add subsets of strings of spectra	iids
addsets	- Add subsets of strings of spectra	irs
addshots	- Adds a shot noise light curve to an input light curve.	xte
addsine	- Adds a sine curve to an input light curve.	xte
addstar	- Add artificial stars to an image using the computed psf	daophot
adumpcat	- Catalog access debugging task	xastcat
adumpcat	- Catalog access debugging task	astcat
adumpim	- Image survey access debugging task	astcat
adumpim	- Image survey access debugging task	xastcat
afiltpars	- Default astrometry file filtering parameters	astcat
afiltpars	- Default astrometry file filtering parameters	xastcat
afin	- convert a sexagesimal character string to radians (s.p.)	slalib
ahedit	- Initialize the image wcs and set standard keywords	astcat
ahedit	- Initialize the image wcs and set standard keywords	xastcat
aidpars	- Automatic line identification parameters and algorithm	onedspec
aimfind	- Select images containing catalog objects	xastcat
aimfind	- Select images containing catalog objects	astcat
airmas	- compute the airmass at a given zenith distance	slalib
airmass	- Compute the airmass at a given elevation above the horizon	astutil
allocate	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
allocate	- VII.I Using the Computers at CTIO (appendix)	index
allstar	- Group and fit psf to multiple stars simultaneously	daophot
altaz	- compute altazimuth positions, velocities, accelerations	slalib
amp	- convert a geocentric apparent to post IAU 1976 mean place	slalib
amplitude	- Calculate guess amplitude given n,l,m.	grtools
ampqk	- convert a geocentric apparent to post IAU 1976 mean place	slalib
analoglin	- Verify the analog linearity of HSP detectors.	hsp
aop	- convert an apparent to observed place	slalib
aoppa	- pre-compute the set of apparent to observed place parameters	slalib
aoppat	- recompute the apparent to observed place sidereal time parameter	slalib
aopqk	- convert an apparent to observed place	slalib
apall	- Extract 1D spectra (all parameters in one task)	apextract
apall	- Extract 1D spectra (all parameters in one task)	argus
apall	- Extract 1D spectra (all parameters in one task)	ctioslit
apall	- Extract 1D spectra (all parameters in one task)	echelle
apall	- Extract 1D spectra (all parameters in one task)	hydra
apall	- Extract 1D spectra (all parameters in one task)	kpnocoude
apall	- Extract 1D spectra (all parameters in one task)	kpnoslit
apall	- Extract 1D spectra (all parameters in one task)	specred
apbackground	- Background subtraction algorithms	apextract
apdefault	- Set the default aperture parameters	kpnocoude
apdefault	- Set the default aperture parameters	kpnoslit
apdefault	- Set the default aperture parameters and apidtable	apextract
apdefault	- Set the default aperture parameters and apidtable	echelle
apdefault	- Set the default aperture parameters and apidtable	specred
apdemos	- Various tutorial demonstrations	apextract
apedit	- Edit apertures interactively	apextract
apedit	- Edit apertures interactively	argus
apedit	- Edit apertures interactively	ctioslit
apedit	- Edit apertures interactively	echelle
apedit	- Edit apertures interactively	hydra
apedit	- Edit apertures interactively	kpnocoude
apedit	- Edit apertures interactively	kpnoslit
apedit	- Edit apertures interactively	specred
apercen	- Find the aperture center (location phase I).	hsp
aperlocy	- Analyze a target acquisition image.	fos
apershift	- Shift the wavelengths for an object not centered in	z_calib
apextract	- Aperture Extraction Package	twodspec
apfile	- Prepare an aperture corrections file from a text file	photcal
apfile	- Prepare an aperture corrections file from a text file	xphotcal
apfind	- Automatically find spectra and define apertures	apextract
apfind	- Automatically find spectra and define apertures	argus
apfind	- Automatically find spectra and define apertures	ctioslit
apfind	- Automatically find spectra and define apertures	echelle
apfind	- Automatically find spectra and define apertures	hydra
apfind	- Automatically find spectra and define apertures	kpnocoude
apfind	- Automatically find spectra and define apertures	kpnoslit
apfind	- Automatically find spectra and define apertures	specred
apfit	- Fit 2D spectra and output the fit, difference, or ratio	apextract
apfit	- Fit 2D spectra and output the fit, difference, or ratio	echelle
apfit	- Fit 2D spectra and output the fit, difference, or ratio	specred
apflatten	- Remove overall spectral and profile shapes from flat fields	apextract
apflatten	- Remove overall spectral and profile shapes from flat fields	ctioslit
apflatten	- Remove overall spectral and profile shapes from flat fields	echelle
apflatten	- Remove overall spectral and profile shapes from flat fields	kpnocoude
apflatten	- Remove overall spectral and profile shapes from flat fields	kpnoslit
apflatten	- Remove overall spectral and profile shapes from flat fields	specred
apmask	- Create and IRAF pixel list mask of the apertures	apextract
apmask	- Create and IRAF pixel list mask of the apertures	echelle
apmask	- Create and IRAF pixel list mask of the apertures	specred
apnoise	- Compute and examine noise characteristics of spectra	apextract
apnormalize	- Normalize 2D apertures by 1D functions	apextract
apnormalize	- Normalize 2D apertures by 1D functions	ctioslit
apnormalize	- Normalize 2D apertures by 1D functions	echelle
apnormalize	- Normalize 2D apertures by 1D functions	kpnocoude
apnormalize	- Normalize 2D apertures by 1D functions	kpnoslit
apnormalize	- Normalize 2D apertures by 1D functions	specred
apodize	- apodize solar disc edge with a cosine bell curve (SRCpiece)	suntrans
appendix	- Appendices to the Reduction Manuals	manuals
apply_bary	- apply the barycenter time corrections to the time-sorted QPOE file	timcor
approfiles	- Profile determination algorithms	apextract
aprecenter	- Recenter apertures	apextract
aprecenter	- Recenter apertures	argus
aprecenter	- Recenter apertures	ctioslit
aprecenter	- Recenter apertures	echelle
aprecenter	- Recenter apertures	hydra
aprecenter	- Recenter apertures	kpnocoude
aprecenter	- Recenter apertures	kpnoslit
aprecenter	- Recenter apertures	specred
apresize	- Resize apertures	kpnocoude
apresize	- Resize apertures	kpnoslit
apropos	- List all the tasks related with a given subject.	stsdas
apropos	- Print help information about a subject	ctio
apscatter	- Fit and remove scattered light	argus
apscatter	- Fit and remove scattered light	hydra
apscatter	- Fit and subtract scattered light	apextract
apscatter	- Fit and subtract scattered light	echelle
apscatter	- Fit and subtract scattered light	specred
apsum	- Extract 1D spectra	kpnocoude
apsum	- Extract 1D spectra	kpnoslit
aptest	- Run basic tests on the apphot package tasks	apphot
aptrace	- Trace positions of spectra	apextract
aptrace	- Trace positions of spectra	argus
aptrace	- Trace positions of spectra	ctioslit
aptrace	- Trace positions of spectra	echelle
aptrace	- Trace positions of spectra	hydra
aptrace	- Trace positions of spectra	kpnocoude
aptrace	- Trace positions of spectra	kpnoslit
aptrace	- Trace positions of spectra	specred
apvariance	- Extractions, variance weighting, cleaning, and noise model	apextract
arc	- Fix header information for arc extraction	sam
aread	- Asynchronous read from a binary file	fio
areadb	- Asynchronous read from a binary file in byte units	fio
aregpars	- Default region parameter set	astcat
aregpars	- Default region parameter set	xastcat
argus	- CTIO ARGUS reduction package	imred
artcat	- create an artificial catalog	ifocas
artdata	- Artificial data generation package [up]	noao
asca	- ASCA mission specific package	ftools
ascaarf	- Generates an ASCA ARF file for an input PHA file	asca
ascaeffmap	- Generates an ASCA EFF detector image file for an input PHA file	asca
ascaexpo	- Generate an exposure map for an ASCA observation.	asca
ascalin	- Produce the ASCA calibrated science file data products	asca
ascii2pha	- Creates an OGIP FITS PHA file from an ascii dataset	heasarc
asifree	- Free space allocated by asiinit or asisinit	iminterp
asigeti	- Fetch an integer parameter	iminterp
asiinit	- Initialize 1-D interpolant using default parameters	iminterp
asirestore	- Restore interpolant parameters and coefficients	iminterp
asisave	- Save interpolant parameters and coefficients	iminterp
asisinit	- Initialize 1-D interpolant using user parameters	iminterp
asitype	- Decode string into interpolant type and parameters	iminterp
asivector	- Evaluate interpolant at an array of x	iminterp
asnexpand	- Expand ASN tables to include extra ASC columns.	nicmos
astcalc	- Astronomical calculator	astutil
astcat	- Astronomical catalog and surveys access package [up]	noao
asthedit	- Astronomical header editor	astutil
astradius	- Find images within a circle on the sky	astutil
astrometry	- Astrometry package	noao
asttest	- Run basic tests on the astcat package	astcat
asttimes	- Compute UT, Julian day, epoch, and siderial time	astutil
astutil	- Astronomical utilities package [up]	noao
at_data	- Documentation on the atomic reference data	nebular
atmdsp	- apply atmospheric dispersion terms to refraction coefficients	slalib
attitude	- Compute summary information for an ASCA attitude file	asca
autoarc	- Automatic arcline identification task	spec1
autoarc	- Automatic arcline identification task	spec2
autocorr	- Autocorrelate an image.	fourier
autofocas	- automatic FOCAS processing script	ifocas
autoidentify	- Automatically identify lines and fit dispersion	onedspec
autopsf	- automatic PSF estimation	ifocas
autospec	- Fit model components to a list of input spectra	aspec
av2m	- compute a rotation matrix from an axial vector (s.p.)	slalib
average	- Compute the mean and standard deviation of a list	lists
avgvel	- Evaluate average velocity for one pixel	fabry
avshift	- Averages the shifts measured on the 4 WFPC chips.	dither
await	- Wait for an asynchronous i/o transfer to complete	fio
awaitb	- Wait for i/o, and return status in byte units	fio
awrite	- Asynchronous write to a binary file	fio
awriteb	- Asynchronous write to a binary file in byte units	fio
axispar	- Specify axis and scaling parameters (pset for 'sgraph')	stplot
axispar	- Specify scaling attributes (pset for 'sgraph')	tbplot
back	- Return to the previous directory (after a chdir)	language
background	- Fit and subtract a line or column background	ctioslit
background	- Fit and subtract a line or column background	generic
background	- Fit and subtract a line or column background	kpnocoude
background	- Fit and subtract a line or column background	kpnoslit
background	- Fit and subtract a line or column background	longslit
background	- Fit and subtract a line or column background	specred
background	- I.3 A Quick View of IRAF (irafintro)	index
badpiximage	- Create a bad pixel mask image (from imred.ccdred V2.10.4)	nobsolete
badpixupdate	- Update bad pixel mask to include bad pixels detected by xzap	xdimsum
badpixupdate	- Update bad pixel mask to include bad pixels detected by xzap	xirred
badpixupdate	- Update bad pixel mask to include pixels zapped repeatedly by xzap	dimsum
bal_plot	- Plot the current BAL histogram (Einstein IPC data only).	xspectral
bandpar	- Calculate photometric parameters of a passband	synphot
base2dec	- Convert a number in a base to base 10 (decimal).	tools
bases	- Convert an integer to hex, octal, and binary	nlocal
basic2d	- Performs two dimensional image reduction on STIS data.	stis
batchred	- Batch processing of IIDS/IRS spectra	iids
batchred	- Batch processing of IIDS/IRS spectra	irs
bbodypars	- Pset with parameters for black-body function.	fitting
bct	- Produce a Barycenter Correction Table from ROSAT orbit data	rosat
be_ds_rotate	- rotate bright Earth and deep survey maps from BKFAC table	eintools
bear	- compute the bearing of a point on a sphere w.r.t. another	slalib
beep	- Send a beep to the terminal	language
bepos	- determine the best source position from a rough position list	detect
beta	- Calculate Beta after Brodsky & Vorontsov, Tenerife 1998.	grtools
bevington	- P.R. Bevington's statistical analysis package	math
bgqcplot	- 1 to 4 row and/or column plots produced in batch mode	qcgong
bhkmethod	- Compute the generalized Kendall's tau correlation coefficient.	statistics
bias	- General bias subtraction tools	imred
biaseq	- Equalize bias levels in MultiAccum readouts.	nicmos
bibliography	- Summary of IRAF documentation	doc
big_mak_list	- description of big_mak input list. (help file only-no task)	merge
bin2iraf	- Convert binary files into IRAF images	ctio
bincurve	- Bins vectors and outputs as a light curve	heasarc
binfil	- Create a binary file from an IRAF image	proto
binpairs	- Bin pairs of (x,y) points in log separation	nproto
binspec	- Bin spectra in vector columns	heasarc
binstrm	- bin values in an input text stream	ifocas
bintxt	- Convert a binary file to an IRAF text file	dataio
bitcount	- Accumulate the bit statistics for a list of images	obsutil
bitcount	- Count the bits for each pixel of an integer image	nlocal
bkden	- determine the background density of a given region	detect
bkfac_make	- create background factors table from QPOE file	eintools
bkg	- Subtract a background from a binned light curve	heasarc
blink	- Blink two frames	iis
blot	- Image sampling using interpolation (reverse "drizzling").	dither
bmodel	- Build a model image from isophotal analysis data.	isophote
boxinterp	- Fill areas with smoothed values from surrounding	imgtools
bplot	- Batch plot of spectra with SPLOT	kpnocoude
bplot	- Batch plot of spectra with SPLOT	kpnoslit
bplot	- Batch plots of spectra	longslit
bplot	- Batch plots of spectra	onedspec
bracewell	- Create functions and view them with FTs	sobsolete
brktime	- Convert a long integer time into year, month, day, etc.	etc
bscale	- Linearly transform the intensities of a list of images	proto
bspec	- Compute FOS scattered light spectrum using FFTs.	fos
bswap	- Byte swap a file	nlocal
bswitch	- Beam-switch strings of spectra to make obj-sky pairs	iids
bswitch	- Beam-switch strings of spectra to make obj-sky pairs	irs
btoi	- Boolean to integer	etc
buckleyjames	- Compute linear regression coeffs based on Kaplan-Meier residuals.	statistics
bugs	- description of known IRAF/PROS bugs	xray
bugs	- Bug reports for installed software	doc
bundle	- Co-average sets of images taken at a single telescope pointing	dimsum
burst	- Remove bursts of events from time ordered event list	time
burst	- form small l files from super images (SRCpiece)	suntrans
bwfilter	- 1-D Fourier filtering.	playpen
bye	- Exit a task or package	language
c4mpars	- Edit the 4m MOSAIC centering parameters	xphotred
cache	- Cache parameter files, or print the current cache list	language
caf2r	- convert degrees, arcminutes, and arcseconds to radians	slalib
calbasic	- Set up basic information needed for calibration	taucal
calc_bary	- calculate the barycenter time corrections	timcor
calc_factors	- add bright Earth & deep survey factors to BKFAC table	eintools
calcband	- Calculate a model passband.	synphot
calcomp	- Plot metacode on a Calcomp pen plotter	plot
calcphot	- Calculate photometric quantities for spectra and passbands.	synphot
calcrpsf	- Calculates a radial point spread function	caltools
calcspec	- Calculate a model spectrum.	synphot
caldj	- convert a Gregorian calendar date to a modified Julian date	slalib
cale_fits2qp	- convert fits to qpoe for Einstein data	xinstall
calfoc	- Pipeline calibration code for FOC data.	foc
calfos	- Pipeline calibration for FOS.	fos
calhrs	- Pipeline calibration for HRS.	hrs
calhsp	- Perform pipeline calibration correction of HSP data files.	hsp
calibrate	- Apply extinction and flux calibrations to spectra	ctioslit
calibrate	- Apply extinction and flux calibrations to spectra	echelle
calibrate	- Apply extinction and flux calibrations to spectra	kpnocoude
calibrate	- Apply extinction and flux calibrations to spectra	kpnoslit
calibrate	- Apply extinction and flux calibrations to spectra	longslit
calibrate	- Apply extinction and flux calibrations to spectra	onedspec
calibrate	- Apply sensitivity correction to spectra	iids
calibrate	- Apply sensitivity correction to spectra	irs
calibrate	- Extinction and flux calibrate spectra	specred
calnica	- Pipeline calibration for single NICMOS images.	nicmos
calnicb	- Pipeline calibration for NICMOS associations.	nicmos
calpolar	- Perform polarimetry processing of calibrated data.	spec_polar
calr_fits2qp	- convert fits to qpoe for Rosat data	xinstall
calr_qp2fits	- convert qpoe to fits for Rosat data	xinstall
calrun	- Set up information for each file	taucal
calstis	- Process STIS images (imaging and spectrum) through the	stis
caltools	- Calibration data manipulation package	ftools
calwfp	- Run the WF/PC calibration code on an input image.	wfpc
calwp2	- Routine calibration of HST Wide Field Planetary Camera-II images.	wfpc
calyd	- convert a Gregorian calendar date to a Julian calendar year, day	slalib
carrousel	- Calibrate HRS carrousel position.	z_calib
cat2exp	- create exposure map from constant aspect table	eintools
cat_make	- create constant aspect table from QPOE file	eintools
catalog	- Select and print fields from ADC CD-ROM table catalogs	adccdrom
catfits	- Produce a catalog of FITS files on tape or on disk	fitsio
cathodemap	- Compute the granularity of the HRS photocathode.	z_calib
catmatch	- match objects in single catalog to form a matched catalog	ifocas
catparams	- create or modify catalog non-interactively	ifocas
catsort	- sort catalog by certain fields	ifocas
cc2s	- convert Cartesian to spherical coordinates (s.p.)	slalib
cc62s	- convert a 6-vector from Cartesian to spherical coordinates	slalib
ccdgeometry	- Discussion of CCD coordinate/geometry keywords	ccdred
ccdgeometry	- Discussion of CCD coordinate/geometry keywords	quad
ccdgeometry	- Discussion of CCD coordinate/geometry keywords	quadred
ccdgeometry	- Discussion of CCD coordinate/geometry keywords	xccdred
ccdgroups	- Group CCD images into image lists	ccdred
ccdgroups	- Group CCD images into image lists	quad
ccdgroups	- Group CCD images into image lists	quadred
ccdgroups	- Group CCD images into image lists	xccdred
ccdinfo	- print detpars, gain table, and temperatures	ccdacq
ccdinstrument	- Review and edit instrument translation files	ccdred
ccdinstrument	- Review and edit instrument translation files	quad
ccdinstrument	- Review and edit instrument translation files	quadred
ccdinstrument	- Review and edit instrument translation files	xccdred
ccdlist	- List CCD processing information	ccdred
ccdlist	- List CCD processing information	quad
ccdlist	- List CCD processing information	quadred
ccdlist	- List CCD processing information	xccdred
ccdlist	- List mosaic processing information	mscred
ccdlist	- List mosaic processing information	mscred
ccdlist	- List mosaic processing information	multampccd
ccdlist	- List mosaic processing information	multampccd
ccdman	- Reduction Manual for CCD Direct Imaging	manuals
ccdmask	- Create a pixel mask from a CCD image	nmisc
ccdproc	- Process CCD images (including quadformat data)	quadred
ccdred	- Generic CCD reductions	imred
ccdred	- VII.I Using the Computers at CTIO (appendix)	index
ccdtest	- CCD test and demonstration package	ccdred
ccdtest	- CCD test and demonstration package	xccdred
ccdtime	- Compute time, magnitude, and signal-to-noise for CCDs	astutil
ccdtypes	- Description of the CCD image types	ccdred
ccdtypes	- Description of the CCD image types	quad
ccdtypes	- Description of the CCD image types	quadred
ccdtypes	- Description of the CCD image types	xccdred
ccfind	- Find catalog sources in an image	imcoords
ccmap	- Compute image plate solutions using matched coordinate lists	imcoords
ccsetwcs	- Create an image celestial wcs from the ccmap plate solution	imcoords
ccstd	- Transform to and from standard astrometric coordinates	imcoords
ccsystems	- Describe the supported celestial coordinate systems	skywcs
cctoc	- Character constant to char	fmtio
cctran	- Transform coordinate lists using the ccmap plate solution	imcoords
ccxymatch	- Match celestial and pixel coordinate lists	imcoords
cd	- Change directory	language
cd2tf	- convert an interval in days to hours, minutes, and seconds	slalib
cellmap	- block a qpoe file at detect cell size resolution	detect
censor	- Information about the censoring indicator in survival analysis.	statistics
center	- Compute accurate centers for a list of objects	apphot
center	- Compute accurate centers for a list of objects	irred
centerflux	- Compute the flux values for the center of a diode array.	z_calib
centerpars	- Edit the centering algorithm parameters	daophot
centerpars	- Edit the centering parameters	apphot
centerpars	- Edit the centering parameters	irred
centro	- Find the centroid of the solar image	gongcor
cgausspars	- Pset with parameters for constrained Gaussians function.	fitting
cgiparse	- Parse STRING_QUERY environment variable into task parameters	obsutil
chart	- Interactively chart 2-dimensional data	mtools
chcalpar	- Modify calibration keyword values.	ctools
chdeposit	- Deposit a character in a string with overflow protection	fmtio
chdir	- Change directory	language
checkds	- Check images for Date/Scan collisions.	fts
checkwfpc	- Perform consistency checks on a WF/PC reference file.	wfpc
chfetch	- Fetch a character from a string	fmtio
chgkeywrd	- Change keywords in a header file.	sobsolete
chip	- Put information on CCD chip into a standard file	scp
chiplot	- plot a chi-square table (output of period)	xtiming
chkconfig	- Check the configuration file for grammar and syntax errors	photcal
chkconfig	- Check the configuration file for grammar and syntax errors	xphotcal
chnode	- Change the node in the pixel path for a list of images	nlocal
chpixfile	- Change pixel file name in image headers	ctio
chpixtype	- Change the pixel type of a list of images	imutil
chrlwr	- Convert a character to lower case	fmtio
chrupr	- Convert a character to upper case	fmtio
chscan	- Change the scan number of an image.	fts
cktime	- Checks that a time column is time ordered	time
cl	- Execute commands from the standard input	language
clampc	- GONG+ Clamp correction	gongcor
clampr	- Clamp calibration correction	gongcor
clbye	- A cl followed by a bye (used to save file descriptors)	language
clcmd	- Send a command to the CL (restricted)	clio
cldj	- convert a Gregorian calendar date to a modified Julian date	slalib
clean	- replace objects by sky	ifocas
cleanhd	- Clean SAM specific things out of an image header	sam
cleansis	- Detect anomalous ASCA SIS pixel values and output the cleaned	asca
cleanup	- Remove dud pixels and 16 bit errors	scp
clear	- Clear the terminal screen	language
clgfil	- Get a file from a list opened with clpopn[isu]	clio
clginterp	- Get integer code for interpolator type	xtools
clglp[bcsilrdx]	- Get the next value from a list-structured CL parameter	clio
clglstr	- Get the next value from a string list-structured CL parameter	clio
clgsec	- Get and decode an image section	xtools
clgstr	- Get the value of a CL string type parameter	clio
clgwrd	- Get the first word from a string valued CL parameter	clio
clio	- Command Language i/o	sys
clman	- CL reference manual	doc
clpcls	- Close a list opened with clpopn[isu]	clio
clplen	- Number of elements in a list opened with clpopn[isu]	clio
clpopni	- Open a sorted input filename template	clio
clpopns	- Open a sorted filename template or namelist	clio
clpopnu	- Open an unsorted filename template or namelist	clio
clprintf	- Formatted print to a CL parameter	fmtio
clpstr	- Set the value of a string valued CL parameter	clio
clscan	- Scan a CL parameter	fmtio
clyd	- convert a Gregorian calendar date a Julian calendar year, day	slalib
cnvdate	- Convert long integer time to date string (short format)	etc
cnvtime	- Convert long integer time to time string (long format)	etc
coadd	- Calculate average measurements in specified phase intervals.	timeseries
coefdiag_file	- description of mode coefficient diagram file	suntrans
coefs	- Extract mtn reduced ceofficients from henear scans	iids
coefs	- Extract mtn reduced ceofficients from henear scans	irs
cogetr	- Efficent image column access	xtools
cogonphot	- Create a 2m ONIS IR standard star observations file using cogs	xphotred
coincor	- Correct spectra for detector count rates	iids
col2img	- Converts a collimator response dataset to an image	caltools
colbias	- Fit and subtract an average column bias	bias
colnames	- Specify star catalog column names (pset for 'skymap').	stplot
colselect	- Select column ranges	ctio
columns	- Convert multicolumn file to separate files	lists
comap	- Map for column access procedure	xtools
combine	- Combine CCD images	ccdred
combine	- Combine CCD images	quad
combine	- Combine CCD images	quadred
combine	- Combine CCD images	xccdred
combine	- Combine images using various algorithms & pixel rejection schemes.	wfpc
combine	- Combine mosaic exposures	mscred
combine	- Combine mosaic exposures	mscred
combine	- Combine mosaic exposures	multampccd
combine	- Combine mosaic exposures	multampccd
commands	- A discussion of the syntax of IRAF commands	language
comparesets	- Compare spectra at different waveplate positions.	spec_polar
compass	- Draw north and east arrows.	sdisplay
comppars	- Pset with parameters for composite (bb + powerlaw) function.	fitting
compression	- Image compression package	ctio
comps	- make a series of comparison observations	ccdacq
compspec	- Create a spectrum from an algebraic expression.	testdata
concatenate	- Concatenate a list of files	system
conpars	- Edit the 2m ONIS centering parameters	xphotred
console	- Help page for using the SUN console windows	manuals
constr_set	- Constrain a parameter for all components in the db	aspec
contents	- Contents of the Reduction Manuals	manuals
continpars	- Edit continuum subtraction parameters	rv
continuum	- Fit and normalize the continuum of multispec spectra	ctioslit
continuum	- Fit and normalize the continuum of multispec spectra	kpnocoude
continuum	- Fit and normalize the continuum of multispec spectra	kpnoslit
continuum	- Fit the continuum in spectra	argus
continuum	- Fit the continuum in spectra	echelle
continuum	- Fit the continuum in spectra	hydra
continuum	- Fit the continuum in spectra	iids
continuum	- Fit the continuum in spectra	irs
continuum	- Fit the continuum in spectra	onedspec
continuum	- Fit the continuum in spectra	specred
contour	- Make a contour plot of an image	plot
controlpars	- Pset with algorithm control parameters.	fitting
convert	- Convert ASCII data base format to STSDAS table format.	sobsolete
convolve	- Convolve a list of 1 or 2-D images with a rectangular filter	imfilter
coords	- description of IRAF coordinates used in PROS	xray
coords	- Compute celestial coordinates	ctio
copyftt	- Copy a list of FITS tables to a local directory with correct extensions	gasp
copymask	- Copy mask from one format into another.	sobsolete
cosmicrays	- Detect and replace cosmic rays	quad
cosmicrays	- Detect and replace cosmic rays	xccdred
cosmicrays	- Remove cosmic rays using flux ratio algorithm	crutil
counmap	- Unmap for column access procedure	xtools
count	- Count the number of lines, words, characters in a text file	system
countfiles	- Count how many files are in the input file template.	imgtools
countrate	- Evaluate the photometric count rate of the HST.	synphot
counts_plot	- Plot the observed and/or predicted counts distributions.	xspectral
countspec	- Calculate FOS countrate spectrum from flux spectrum.	fos
coxhazard	- Compute the correlation probability by Cox's proportional	statistics
cpars	- Edit the general centering parameters	xphotred
cputime	- Get the CPU time consumed by the process	etc
cqfimquery	- Query an image file and return the results	catquery
cqfinfo[n]	- Get catalog results field info by name or number	catquery
cqfquery	- Query a catalog file and return the results	catquery
cqget	- Read catalog / survey configuration file keywords directly	catquery
cqgnrecord	- Get next catalog results record	catquery
cqgqpar[n]	- Get query parameter info by name or number	catquery
cqhinfo[n]	- Get catalog results header value by name or number	catquery
cqimquery	- Query an image survey and return the results	catquery
cqistat[ist]	- Get survey results integer, string, or text parameter	catquery
cqkinfo[n]	- Get survey results image parameter info by name or number	catquery
cqlocate[n]	- Locate a catalog / survey by name or number	catquery
cqmap	- Map the catalog / survey configuration file	catquery
cqnqpars	- Get the number of query parameters	catquery
cqquery	- Query a catalog and return the results	catquery
cqrstat[ist]	- Get catalog results integer, string, or text parameter	catquery
cqsetcat[n]	- Set the current catalog / survey by name or number	catquery
cqsqpar[n]	- Set query parameter value by name or number	catquery
cqstat[ist]	- Get an integer, string, or text catalog / survey parameter	catquery
cqunmap	- Unmap the configuration file	catquery
cqwinfo[n]	- Get survey results wcs parameter info by name or number	catquery
cr2af	- convert radians to degrees, arcminutes, and arcseconds	slalib
cr2tf	- convert radians to hours, minutes, and seconds	slalib
crashes	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
craverage	- Detect CRs against average and avoid objects	crutil
crcif	- Creates an empty Calibration Index File	caltools
crcombine	- Combine multiple exposures to eliminate cosmic rays	crutil
credit	- Interactively edit cosmic rays using an image display	crutil
crfix	- Fix cosmic rays in images using cosmic ray masks	crutil
crgrow	- Grow cosmic rays in cosmic ray masks	crutil
cribsheet	- Cribsheet for the Program Interface	doc
crmedian	- Detect and replace cosmic rays with median filter	crutil
crnebula	- Detect and replace cosmic rays in nebular data	crutil
crossdriz	- Builds a set of cross-correlation images (shift + rotation).	dither
crrej	- Combine images to make a cosmic ray free image.	wfpc
crtpict	- Generate greyscale plots of IRAF images	plot
crutil	- Tasks for detecting and removing cosmic rays	imred
cs2c	- convert spherical to Cartesian coordinates (s.p.)	slalib
cs2c6	- convert spherical position/velocity to Cartesian coordinates	slalib
csccd	- Reduction Manual for CSCCD Data	manuals
ctf2d	- convert hours, minutes, and seconds to days	slalib
ctf2r	- convert hours, minutes, and seconds to radians	slalib
ctio	- VII.I Using the Computers at CTIO (appendix)	index
ctioslit	- CTIO spectrophotometric reduction package	imred
ctocc	- Char to character constant	fmtio
ctoi	- Character to integer	fmtio
ctol	- Character to long	fmtio
ctools	- General calibration tools.	hst_calib
ctotok	- Character to lexical token	fmtio
cubespe	- Extract spectra from SLDC using cursor on 2d image	ndprogs
curfit	- Fit data with Chebyshev, Legendre or spline curve	utilities
curfit	- IRAF curve fitting package	math
cursors	- Graphics and image display cursors	language
cv	- Control image device, display "snapshot"	iis
cvacpts	- Accumulate points into a data set	curfit
cvcoeff	- Get coefficients	curfit
cvepower	- Convert errors to power series equivalents	curfit
cvfree	- Free space allocated by cvinit	curfit
cvinit	- Make ready to fit a curve; set up parameters of fit	curfit
cvl	- Load image display (newer version of 'display')	iis
cvpower	- Convert coefficients to power series coefficients	curfit
cvrestore	- Restore curve parameters and coefficients	curfit
cvsave	- Save curve parameters and coefficients	curfit
cvset	- Input coefficients derived external to the CURFIT package	curfit
cvstati	- Get integer parameter	curfit
cvvector	- Evaluate curve at an array of x	curfit
cvzero	- Zero arrays for new fit	curfit
d4mpars	- Edit the 4m MOSAIC data dependent parameters	xphotred
daf2r	- convert degrees, arcminutes, and arcseconds to radians (d.p)	slalib
dafin	- convert a sexagesimal character string to radians (d.p.)	slalib
daoedit	- Review/edit algorithm parameters interactively	daophot
daofind	- Find stars in an image using the DAO algorithm	daophot
daofind	- Find stars in an image using the dao algorithm	apphot
daotest	- Run basic tests on the daophot package tasks	daophot
darkcombine	- Combine and process dark count images	ccdred
darkcombine	- Combine and process dark count images	quad
darkcombine	- Combine and process dark count images	quadred
darkcombine	- Combine and process dark count images	xccdred
darkcombine	- Combine and process mosaic dark count exposures	mscred
darkcombine	- Combine and process mosaic dark count exposures	mscred
darkcombine	- Combine and process mosaic dark count exposures	multampccd
darkcombine	- Combine and process mosaic dark count exposures	multampccd
darks	- make a series of dark observations	ccdacq
darkstat	- Compute statistics on dark count calibration spectra.	z_calib
darksub	- Scale and subtract a dark count image	generic
darksum	- Produce a report on dark count calibration spectra.	z_calib
darkv	- Calculate dark signals of individual observations.	hsp
darkx	- Create a FOC dark count image.	focphot
dat	- compute difference between TAI and UTC in seconds	slalib
dataio	- Data format conversion package (RFITS, etc.)	clpackage
datapars	- Edit the data dependent parameters	apphot
datapars	- Edit the data dependent parameters	irred
datapars	- Edit the image data dependent parameters	daophot
datarep	- convert binary number representations to host computer format	xdataio
dav2m	- compute a rotation matrix from an axial vector (d.p)	slalib
daydark	- Update current dark image with hot pixels from a daily dark.	stis
dbcreate	- Task for interactively creating specfit database files	spfitpkg
dbear	- compute the bearing of a point on a sphere w.r.t. another (d.p.)	slalib
dbjin	- convert a character string to a Besselian/Julian epoch	slalib
dbms	- Database management package (not yet implemented)	clpackage
dc62s	- convert Cartesian position/velocity to spherical coordinates (d.p.)	slalib
dcapinfo	- print contents of detcap	ccdacq
dcc2s	- convert Cartesian to spherical coordinates (d.p)	slalib
dcmpf	- convert linear fit coefficients to geometric parameters	slalib
dcs2c	- convert spherical to Cartesian coordinates (d.p)	slalib
dd2tf	- convert interval in days to hours, minutes, and seconds (d.p.)	slalib
ddiff	- Print differences between two directory trees.	tools
de2h	- convert hour angle and declination to azimuth and elevation (d.p.)	slalib
deaccum	- Unstack ACCUM mode data into separate readouts.	fos
deadtime	- Update the exposure of PHA file by deadtime based on GTIs	time
deadtimev	- Calibrate the deadtime (digital linearity).	hsp
deadtimey	- Compute FOS paired-pulse coefficients.	y_calib
deadtimez	- Compute HRS paired pulse coefficients.	z_calib
deallocate	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
deboor	- C.DeBoor's spline package	math
dec2base	- Convert a base 10 (decimal) number to another base.	tools
declarations	- Parameter/variable declarations	language
defitize	- Convert all FITS files in currect directory to images	mtools
defpac	- Test if a package is defined	language
defpar	- Test if a parameter is defined	language
defringe	- Correct a G750L or G750M spectrum for fringing.	stis
deftask	- Test if a task is defined	language
delaytime	- Calculate light time difference from observer to solar system	timeseries
dematch	- Match a list of density values to exposure values	dtoi
demoqdphot	- The QDPHOT demonstration script	mxtools
demos	- Demonstration and test playbacks	longslit
demos	- Demonstrations and tests	argus
demos	- Demonstrations and tests	ctioslit
demos	- Demonstrations and tests	echelle
demos	- Demonstrations and tests	hydra
demos	- Demonstrations and tests	kpnocoude
demos	- Demonstrations and tests	kpnoslit
demowfpc2color	- The WFPC2COLOR demonstration script	mxtools
deredden	- Apply interstellar extinction correction	longslit
deredden	- Apply interstellar extinction correction	onedspec
deredden	- Apply interstellar extinction correction	specred
deredden	- Apply interstellar extinction corrections	ctioslit
deredden	- Apply interstellar extinction corrections	echelle
deredden	- Apply interstellar extinction corrections	iids
deredden	- Apply interstellar extinction corrections	irs
deredden	- Apply interstellar extinction corrections	kpnocoude
deredden	- Apply interstellar extinction corrections	kpnoslit
deriv	- Take the absolute derivative of an image.	dither
describe	- Display a description of the named task(s) or package(s).	stsdas
destreak5	- First pass processing CL script for 10830 grams.	vtel
destreak5	- First pass processing CL script for 10830 grams.	vtelold
detect	- detect objects in an image	ifocas
detmkreg	- make a region file in logical coords from detect tables	detect
detrend	- remove trend from images on a heliographic coordinate system (SRCpiece)	suntrans
deuler	- convert Euler angles to a rotation matrix (d.p.)	slalib
devices	- Print information on the locally available devices	system
devstatus	- Print the status of a device (mta, mtb, ...)	system
dezoomx	- Dezoom an image, doubling line length in one dimension.	focphot
dfe2mkf	- Insert output information of FAINTDFE into existing MKF file	asca
dfltin	- convert a character string to a floating point number (d.p.)	slalib
dh2e	- convert azimuth and elevation to hour angle and declination (d.p.)	slalib
diagcols	- Pset for zone temperature & density column names	nebular
dicoplot	- Make dicomed plots of carrington maps.	vtel
dicoplot	- Make dicomed plots of carrington maps.	vtelold
digiphot	- Digital stellar photometry package [up]	noao
dimxv	- apply a 3D reverse rotation to a 3-vector (d.p.)	slalib
diodemap	- Compute the diode response non-uniformities.	z_calib
directory	- List the files in a directory	system
diropen	- Open a directory as a text file	fio
disconlab	- Display image and overlay contours and coordinates.	sdisplay
disk_image	- disk image description (help file only-no task)	suntrans
dispcor	- Dispersion correct and resample spectra	onedspec
dispcor	- Dispersion correct spectra	argus
dispcor	- Dispersion correct spectra	ctioslit
dispcor	- Dispersion correct spectra	echelle
dispcor	- Dispersion correct spectra	hydra
dispcor	- Dispersion correct spectra	iids
dispcor	- Dispersion correct spectra	irs
dispcor	- Dispersion correct spectra	kpnocoude
dispcor	- Dispersion correct spectra	kpnoslit
dispcor	- Dispersion correct spectra	specred
dispfity	- Compute FOS wavelength dispersion coefficients.	y_calib
display	- Load an image or image section into the display	tv
display	- VII.I Using the Computers at CTIO (appendix)	index
displaying	- I.7 Tutorial #5 Displaying Images (irafintro)	index
disptrans	- Transform dispersion units and apply air correction	onedspec
dither	- Dithered image combination.	analysis
djcal	- convert an MJD to a Gregorian calendar date	slalib
djcl	- convert an MJD to a Gregorian year, month, and day	slalib
dm2av	- convert a rotation matrix to an axial vector (d.p)	slalib
dmat	- solve a set of simultaneous equations (d.p.)	slalib
dmoon	- compute approximate geocentric position/velocity of moon (d.p.)	slalib
dmprmf	- Displays OGIP standard Response FITS file	caltools
dmxv	- multiple a 3-vector by a rotation matrix (d.p.)	slalib
do3fiber	- Process KPNO coude three fiber spectra	kpnocoude
dofitplot	- Do fit and then counts_plot	xspectral
donpars	- Edit the 2m ONIS data dependent parameters	xphotred
dopcor	- Apply doppler corrections	longslit
dopcor	- Apply doppler corrections	onedspec
dopcor	- Doppler correct spectra	kpnocoude
dopcor	- Doppler correct spectra	kpnoslit
dopoff	- Calculate on-board Doppler compensation for specalign.	hrs
doslit	- Process KPNO coude slit spectra	kpnocoude
doslit	- Process slit spectra	kpnoslit
dparam	- Dump a pset as a series of task.param=value assignments	language
dpars	- Edit the general data dependent parameters	xphotred
dpav	- compute the bearing of a point on a sphere w.r.t. another (d.p.)	slalib
dqenormx	- Normalize a detective efficiency file to unity.	focphot
dr2af	- convert radians to degrees, arcminutes, and arcseconds (d.p)	slalib
dr2tf	- convert radians to hours, minutes, and seconds (d.p.)	slalib
drange	- normalize an angle to the range -pi <= angle <= pi (d.p.)	slalib
dranrm	- normalize an angle to the range 0 <= angle <= 2pi (d.p.)	slalib
drep2cal	- task to install spectral & spatial calibration files	xinstall
drift	- GONG instrument drift scan tools (ct)	grasp
driftred	- Process driftscan images for use in COPIPE	drift
driftsum	- Process a day of driftscan images	drift
drizzle	- Perform linear image reconstruction using "drizzling".	dither
ds2c6	- convert spherical position/velocity to Cartesian coordinates (d.p.)	slalib
ds2tp	- project spherical coordinates onto the tangent plane (d.p)	slalib
dsep	- compute the angle between two points on a sphere (d.p.)	slalib
dsimg	- Save the image display buffer to an image.	sobsolete
dt	- estimate the approximate difference between ET and UT in seconds	slalib
dtf2d	- convert hours, minutes, and seconds to days (d.p)	slalib
dtf2r	- convert hours, minutes, and seconds to radians (d.p.)	slalib
dtoi	- Density to Intensity reductions for photographic plates	imred
dtp2s	- convert tangent plane to spherical coordinates (d.p.)	slalib
dtp2v	- convert tangent plane coordinates to direction cosines (d.p.)	slalib
dtps2c	- compute the spherical coordinates of the tangent point (d.p.)	slalib
dtpv2c	- compute the direction cosines of the tangent point (d.p.)	slalib
dtt	- compute the difference between TT and UTC in seconds	slalib
dunlearn	- Resets all task parameters to default values.	dither
dv2tp	- convert direction cosines to tangent plane coordinates (d.p)	slalib
dvn	- normalize a 3-vector and compute the modulus (d.p.)	slalib
e2h	- convert hour angle and declination to azimuth and elevation (d.p.)	slalib
earth	- compute approximate heliocentric position/velocity of earth	slalib
ecd2pros	- copy/convert FITS files from Einstein CD-ROM archive	eincdrom
ecdel	- Delete an entire class of FITS extensions from a FITS file.	mstools
ecdinfo	- get information about a specific Einstein dataset	eincdrom
ecextract	- Select all extensions of one selected 'type' from a FITS file	mstools
echelle	- Echelle spectral reductions (slit and FOE)	imred
echplot	- Generate and plot IGI scripts for extracted spectral orders.	stis
echscript	- Generate an IGI script for selected extracted spectral orders.	stis
echspec	- Reduction Manual for Echelle Data	manuals
ecidentify	- Identify features in spectrum for dispersion solution	echelle
ecleq	- convert from ecliptic to equatorial FK5 coordinates	slalib
ecmat	- compute the equatorial FK5 to ecliptic coordinates rotation matrix	slalib
ecor	- compute rv of earth and time correction to sun in given direction	slalib
ecreidentify	- Automatically identify features in spectra	echelle
edge	- 2-D image edge massaging.	playpen
edit	- Edit a text file	language
editor	- Help page for use of the VI editor	manuals
efits2qp	- task to convert Einstein FITS files to PROS QPOE format	xdataio
eg50	- convert equatorial FK4 to IAU 1958 galactic coordinates	slalib
eheader	- Interactively edit an image header.	headers
ehistory	- Edit history file to re-execute commands	language
ehistory	- VII.G Using the EHISTORY and EPARAM commands (appendix)	index
eincdpar	- eincdrom package parameter pset	eincdrom
eincdrom	- tasks to access data from Einstein CDROMs	xdataio
eindatademo	- demonstration of Einstein IPC unscreened data	eincdrom
eintools	- tools for creating Einstein exposure and background maps	xspatial
el2ue	- convert osculating orbital elements into universal form	slalib
elapert	- Create polygon files for use in APPHOT polygonal photometry.	sobsolete
emacs	- VII.I Using the Computers at CTIO (appendix)	index
emmethod	- Compute linear regression coeff for a normal distribution of	statistics
emulator	- VII.D Using a PC at CTIO (appendix)	index
encounts	- Compute encircled energy (counts) for star images.	foccs
eng2tab	- Extract various information from SHP, UDL, etc.	ctools
engextr	- Extract info. from WF/PC engineering data (.X0H and .X0D) files.	wfpc
entab	- Replace blanks with tabs and blanks	utilities
envget	- Get the string value of an environment variable	language
envget[bis]	- Get a boolean, integer, or string valued environment variable	etc
environment	- I.3 A Quick View of IRAF (irafintro)	index
eparam	- Edit parameters of a task	language
eparam	- I.3 A Quick View of IRAF (irafintro)	index
eparam	- VII.G Using the EHISTORY and EPARAM commands (appendix)	index
epb	- convert an MJD to a Besselian epoch	slalib
epb2d	- convert a Besselian epoch to an MJD	slalib
epco	- convert a Besselian/Julian epoch to match a given epoch	slalib
ephem	- Ephemeris tables and velocity corrections (jp)	grasp
epheminterp	- Interpolate Ephermis for B0, L0, P_ANGLE & SEMIDIAM.	ephem
ephgeo	- Interpolate a Solar Ephemeris Table.	ephem
ephmvc	- Determine and apply ephemeris velocity corrections	gongcor
ephvel	- Calculate Ephemeris Velocity Corrections.	ephem
epix	- Edit pixels in an image	proto
epj	- convert an MJD to a Julian epoch	slalib
epj2d	- convert a Julian epoch to an MJD	slalib
epoch	- Convert between different time formats.	tools
eprintf	- Formatted print to STDERR	fmtio
eqecl	- convert equatorial FK5 to ecliptic coordinates	slalib
eqeqx	- compute the equation of the equinoxes	slalib
eqgal	- convert equatorial FK5 to IAU 1958 galactic coordinates	slalib
eqwidths	- Compute equivalent widths	ctio
eqxy	- Get (x,y) from a table of (ra,dec) given the pltsol coeff.	gasp
erase	- Erase an image frame	iis
erract	- Take an error action for a previously posted error	etc
errcreate	- Calculate the PROS error array(square of errors) from an image	xspatial
errmsg	- Find the IRAF system error code that matches a pattern	nlocal
error	- Post an error and take an error action	etc
error	- Print error code and message and abort	language
errorpars	- Pset with error-related parameters.	fitting
errors	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
etc	- Miscellaneous system procedures	sys
euler	- convert Euler angles to a rotation matrix (s.p.)	slalib
evalfit	- Compute the standard indices by evaluating the fit	photcal
evalfit	- Compute the standard indices by evaluating the fit	xphotcal
evaluate	- evaluate photometry and astrometry of objects in a catalog	ifocas
evalvg	- Compute the earth-sun-target & sun-earth-sat angles from ephemeris data	xproto
evp	- compute the barycentric/heliocentric velocity/position of earth	slalib
exabyte	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
exabyte	- VII.I Using the Computers at CTIO (appendix)	index
examples	- Print online examples of how to use the named task(s).	stsdas
exp_make	- script to create exposure map from QPOE file	eintools
expand	- Expand polynomial functions into images	model
explain_detect	- describes tasks and algorithms used in the detect package	detect
explain_errors	- description of PROS error computations for low	xray
explain_screen	- description of PROS support for temporal screening	xray
explain_xdata	- description of new RDF file formats	xray
export	- Convert IRAF images to some other format	dataio
exposure	- description of PROS exposure correction support	xray
express	- Evaluate/validate all constraint expressions in a db	aspec
expsf	- extract the PSF description from a catalog	ifocas
extdel	- Delete single extensions from a FITS file.	mstools
extensions	- description of conventions for PROS file extensions	xray
extgst	- Extract selected columns stars from a list of tables.	gasp
extinct	- Use BSWITCH for extinction correction	iids
extinct	- Use BSWITCH for extinction correction	irs
extinction	- Apply atmospheric extinction corrections to images (obsolete)	longslit
extras	- Information about the extra information in 3D images	apextract
extrema	- Find extrema in x and y data points	xtools
exuse	- Help page for using the Exabyte Drives	manuals
f2dhisto	- Make a 2-D histogram from 2 columns in a table	fimage
fabry	- Notes on the Fabry-Perot reduction package	fabry
factor	- Display prime factors of a number.	fourier
fadapt	- Convolve a FITS image with an adaptive top hat filter	fimage
faint	- Convert ASCA faint mode data to a bright mode format	asca
faintdfe	- Calculate the dark frame error for SIS FAINT mode data ***	asca
fakelc	- Creates a fake light curve having a constant mean intensity.	xte
falloc	- Preallocate (uninitialized) storage for a file	fio
fappend	- Append a FITS extension onto another FITS file	futils
faradius	- Compute average radius of autocorrelation of star images.	foccs
farith	- Perform arithmetic on 2 FITS images	fimage
fboxcar	- Convolve a FITS image with a rectangular boxcar filter	fimage
fcalc	- Calculates values for a column using an arithmetic expression	futils
fcarith	- Perform arithmetic on FITS image with a constant	fimage
fcatdiff	- Compares columns of a fits file and reports row differences	futils
fceval	- Evaluate coordinates using the FITSCOORDS solutions	longslit
fconvolve	- Convolve two images.	fourier
fcreate	- Create a FITS table from ASCII input files	futils
fcurve	- Make a light curve histogram from a column in a table	futils
fdevbf	- Install a new binary device in the FIO device table	fio
fdevtx	- Install a new text device in the FIO device table	fio
fdump	- Dump contents of a FITS table to an ASCII file	futils
fesdb2rdf	- Reads i/p QVP and EXP (optional) data files and writes an	gro
fevpbtoa	- Converts Fits formatted Comptel EVP data to an ASCII file.	gro
fextract	- Copy a FITS extension from a file into a new file	futils
fextract	- Extract regions around stars in a focus image.	foccs
fflincorr	- Correct an FOC image for flat-field saturation.	focphot
fft	- FFT an IRAF image.	grtools
fft	- compute fast fourier transform on table or qpoe data	xtiming
fft1d	- One dimensional FFT	ctio
fftplot	- plot a fft table (output of fft)	xtiming
fgauss	- Convolve a FITS image with an elliptical Gaussian function	fimage
fgauss	- Fit a Gaussian to output from 'fsquares' to find focus.	foccs
fgread	- Read a MEF file with FOREIGN extensions	fitsutil
fgwrite	- Create a MEF file with FOREIGN extensions	fitsutil
fhisto	- Make a histogram of a column in a table	futils
fibinfo	- Get some information about particular fibres	wyffos
file_compare	- comparison of new/RDF formats to OLD formats in PROS	xray
files	- Expand a file template into a list of files	system
files	- I.6 Tutorial #3 Handling Images (irafintro)	index
fill	- Baade-Lucy background "filling" algorithm.	playpen
fillin	- Fill in a missing image using linear interpolation	gongcor
filt_corr	- filter correction for power series	merge
filt_map	- perform image registration, temporal filtering and masking (SRCstream)	suntrans
filter	- description of filtering options in PROS	xray
filter_file	- description of filter file for filt_corr (help file only)	merge
filter_file	- description of running mean filter file	suntrans
filterpars	- Pset for setting filter parameters used in the wiener task.	restore
filterphot	- Transform flux measurement to standard photometric system.	timeseries
filtpars	- Edit the filter function parameters	rv
fim2lst	- Convert a 2D image to a pixel list (inverse of f2dhisto)	fimage
fimconcat	- Take 2 images and place them side by side as single image	fimage
fimgbin	- Rebin a FITS image using a rectangular bin size	fimage
fimgdmp	- Dump contents of a FITS image to an ASCII file	fimage
find	- Locate a spectrum on a frame	sam
finder	- Load the prototype finder plate solver package	nlocal
findex	- Create an index file for a FITS table column	futils
findfiles	- Find files recusively through directories	ctio
findfits	- Archive the images in a directory tree to a FITS tape	nlocal
findgain	- Estimate the gain and readnoise of a CCD	obsutil
findpars	- Edit the star detection parameters	apphot
findpars	- Edit the star detection parameters	daophot
findpks	- Locate the pinhole mask peaks on a matrix mask frame	taucal
findshutcorr	- Measure the shutter correction for a CCD camera	nlocal
findsky	- Determine the sky levels in a cube	fabry
findstars	- algorithm to automatically find stars	ifocas
findthresh	- Estimate a CCD's sky noise from the gain and readnoise	nproto
finfo	- Get directory information for a file	fio
fit	- Find best-fit model values using a simplex minimization.	xspectral
fit1d	- Fit a function to image lines or columns	imfit
fit2d	- 2D, weighted, polynomial fit	gongcor
fitband	- Fit a passband model to data using Amoeba simplex method.	synphot
fitcoords	- Fit user coordinates to image coordinates	longslit
fitgrid	- Fit a spectrum model to a grid of spectral data.	synphot
fitize	- Convert all images in current directory to FITS files	mtools
fitoffsety	- Correct dispersion coeff. for wavelength offsets.	fos
fitparams	- Compute the parameters of the transformation equations	photcal
fitparams	- Compute the parameters of the transformation equations	xphotcal
fitpars	- Pset for specifying the fit algorithm, convergence criteria, etc.	aspec
fitprofs	- Fit gaussian profiles	onedspec
fitprofs	- Fit gaussian profiles	specred
fitpsf	- Model the stellar psf with an analytic function	apphot
fitrad	- Fit a function to circular image subrasters	ctio
fitring	- Perform least squares fit to ring data	fabry
fits2bin	- task to install spectral calibration files from fits	xinstall
fits2ephem	- task to install scc_to_utc & jdleap calibration files	xinstall
fits2qp	- convert from FITS TABLE format to PROS QPOE format	xdataio
fits2snr	- task to install xdemo files	xinstall
fitscopy	- Copy FITS files: disk <--> tape and disk <--> disk	fitsio
fitsky	- Compute sky values in a list of annular or circular regions	apphot
fitskypars	- Edit the sky fitting algorithm parameters	daophot
fitskypars	- Edit the sky fitting parameters	apphot
fitslogr	- Make a log of certain header parameters from a FITS tape.	vtel
fitslogr	- Make a log of certain header parameters from a FITS tape.	vtelold
fitspec	- Fit a spectrum model to data using Amoeba simplex method.	synphot
fitsread	- Read compressed FITS file	compression
fitswrite	- Write compressed FITS file	compression
fitting	- Curve fitting tools.	analysis
fitxy	- Compute four-parameter linear fit to X,Y vs V2,V3.	focgeom
fitxy	- fit a linear model to 2 sets of [x,y] coordinates	slalib
fixdiodes	- Fix spectra affected by dead or noisy diodes.	sobsolete
fixicm	- Fix an image to be sent to the Celco	sobsolete
fixnoisex	- Create a fixed-pattern noise image.	focphot
fixpix	- Fix bad pixels by linear interpolation from nearby pixels	proto
fixpix	- Fix pixels defined by a pixel mask	nmisc
fixsaoreg	- Convert an SAOIMAGE region file to PROS physical coords	xspatial
fixtail	- Fix last image lines or columns	ctio
fk425	- convert equatorial FK4 to FK5 coordinates	slalib
fk45z	- convert equatorial FK4 to FK5 coordinates excluding proper motion	slalib
fk524	- convert equatorial FK5 to FK4 coordinates	slalib
fk52h	- convert equatorial FK5 to ICRS coordinates	slalib
fk54z	- convert equatorial FK5 to FK4 coordinates excluding proper motion	slalib
fk5hz	- Convert equatorial FK5 to ICRS coordinates (0 ICRS proper motions)	slalib
fkeyprint	- Display keyword(s) in FITS header(s)	futils
fkeytab	- Copy a FITS header keyword to a FITS table element	futils
flagflat	- Flag WF/PC flat field pixels which are abnormally high or low	w_calib
flamingos	- Reduction tasks for Flamingos-I data	gemini
flamingosinfo	- General help and information on reduction of Flamingos data	flamingos
flat1d	- Make flat field by fitting a 1D func. to the lines or columns	generic
flatcombine	- Combine and process flat field images	ccdred
flatcombine	- Combine and process flat field images	quad
flatcombine	- Combine and process flat field images	quadred
flatcombine	- Combine and process flat field images	xccdred
flatcombine	- Combine and process mosaic flat field exposures	mscred
flatcombine	- Combine and process mosaic flat field exposures	mscred
flatcombine	- Combine and process mosaic flat field exposures	multampccd
flatcombine	- Combine and process mosaic flat field exposures	multampccd
flatfield	- Compute flat field response.	y_calib
flatfields	- Discussion of CCD flat field calibrations	ccdred
flatfields	- Discussion of CCD flat field calibrations	quad
flatfields	- Discussion of CCD flat field calibrations	quadred
flatfields	- Discussion of CCD flat field calibrations	xccdred
flatfit	- Sum and normalize flat field spectra	iids
flatfit	- Sum and normalize flat field spectra	irs
flats	- make a series of flat observations	ccdacq
flatten	- Flatten images using a flat field	generic
flatten	- Flatten images using a flat field	irred
flborder	- Replace border by extrapolating from nearest pixel.	foccs
flcol	- List column information in a FITS table extension	futils
flcorner	- Replace corner of f/48 internal flat with external flat.	foccs
fldplot	- plot a fld table (output of fold)	xtiming
flex	- Calibrate HSP optical bench flexure as functions	hsp
flist	- List contents of a FITS table to an ASCII file	futils
flnorm	- Normalize a flat field by dividing by average of middle region.	foccs
flookup	- Filter a FITS file from selection based on a lookup table	futils
florentz	- Convolve a FITS image with an elliptical Lorentzian function	fimage
flotin	- convert a character string to a floating point number	slalib
flprcache	- Flush the process cache	language
fltime	- Filter an event list within given time intervals (GTIs)	time
fltstrm	- filter values in an input text stream	ifocas
flush	- Flush any buffered output to a file	fio
fluxcalib	- Apply flux calibration to images (obsolete)	longslit
fluxcols	- Pset for line flux column names	nebular
flvmask	- Apply a mask table to interpolate along vertical lines.	foccs
fmaskfilt	- Filter an event list based on an input mask image	fimage
fmedian	- Quantize and box median filter a list of 1D or 2D images	imfilter
fmerge	- Merge rows from several FITS tables into one FITS table	futils
fmode	- Quantize and box modal filter a list of 1D or 2D images	imfilter
fmodhead	- Modify the header keywords in a FITS file	futils
fndlmb	- Determine the figure of the limb of the solar image	gongcor
fnextn	- Extract the extension field of a filename	fio
fnldir	- Extract the logical directory field of a filename	fio
fnroot	- Extract the root field of a filename	fio
fntcls	- Close unbuffered list	fio
fntclsb	- Close buffered list	fio
fntgfn	- Get next filename from unbuffered list	fio
fntgfnb	- Get next filename from buffered list	fio
fntlenb	- Get number of filenames in a buffered list	fio
fntopn	- Open an unbuffered filename list	fio
fntopnb	- Expand template and open a buffered filename list	fio
fntrewb	- Rewind the list	fio
foc	- Tasks for calibrating FOC data.	hst_calib
focas	- Faint object classification and analysis package	noao
focas	- Load the focas package	nlocal
focusv	- Determine electronic focus calibration.	hsp
fold	- fold time data on a period and compute statistics	xtiming
fopnbf	- Open a binary file on a special device	fio
fopntx	- Open a text file on a special device	fio
format	- Format the standard input and pass it to the standard output	mtools
formatdepx	- Create a format-dependent nonuniformity image.	focphot
forward	- Compute forward Fourier transform of an image.	fourier
fos	- Tasks for calibrating FOS data.	hst_calib
fos1	- FOS1 data reduction	spec1
fos2	- FOS2 data reduction	spec1
fos2	- Quick-look FOS2 data reduction	quickie
foswcorr	- Correct calibrated wavelengths (BLUE) for systematic shifts.	fos
fourier	- Fourier analysis.	analysis
fowner	- Get the name of the owner of a file	fio
fparse	- Parse file specifications and leave results in parameters.	tools
fpartab	- Copy a parameter value to a FITS table element	futils
fpathname	- Get the full pathname of a file	fio
fplot	- Plot columns in a FITS file using QDP/PLT package ***	futils
fprepare	- Convert Flamingos data to MEF; attach VAR and DQ extensions	flamingos
fprintf	- Formatted print to any file	fmtio
freq	- Calculate guess frequency given n,l,m.	grtools
freq2pix	- Determine pixel value for a frequency in GPS or LNU image.	grtools
frmedian	- Quantize and ring median filter a list of 1D or 2D images	imfilter
frmode	- Quantize and ring modal filter a list of 1D or 2D images	imfilter
frompolar	- Convert amplitude & phase to real & imaginary parts.	fourier
frozen	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
fsaoi	- Translate an SAOImage region file to an input file for fselect	fimage
fscan	- Scan a file	fmtio
fselect	- Create a new table from selected rows of a table	futils
fseti	- Set an integer FIO parameter	fio
fsort	- Sort a FITS table in place	futils
fsquares	- Compute sum-of-squares sharpness criterion.	foccs
fstati	- Get the value of an integer FIO parameter	fio
fstatistic	- Calculate mean, standard deviation, min, and max for a column	futils
fstatl	- Get the value of a long integer FIO parameter	fio
fstats	- Get the value of a string valued FIO parameter	fio
fstruct	- List a description of the structure of a FITS file	futils
ftabcopy	- Copy specified columns of a FITS table to a new table	futils
ftabkey	- Copy a FITS table element to a FITS header keyword	futils
ftabpar	- Copy a FITS table element to a parameter value	futils
ftp	- VII.I Using the Computers at CTIO (appendix)	index
ftplot	- View 4-way data and FTs.	sobsolete
ftpplot	- plot a ftp table (output of fft)	xtiming
fts	- Fourier Transform Spectrometer reductions, analysis, and db	nso
function	- Generate functions as images, tables or lists.	fitting
futils	- General FITS data manipulations package	ftools
fvec2img	- Create an image from a column of vectors	fimage
fverify	- Verify that a FITS file conforms to the FITS Standard	futils
fweight	- Compute weights using smoothed flux data, for use with splice.	ctools
fwplot	- Plot calibrated flux versus wavelength.	ctools
fxcopy	- Copy FITS files or FITS extension to an output FITS file	fitsutil
fxcor	- Radial velocities via Fourier cross correlation	rv
fxdelete	- Delete FITS extensions in place	fitsutil
fxdummyh	- Create a dataless single FITS file	fitsutil
fxheader	- List one line of header description per FITS unit	fitsutil
fxinsert	- Insert FITS files or extensions into another MEF file	fitsutil
fxplf	- Converts a pixel list file into a BINTABLE extension	fitsutil
fxsplit	- Split a multiple extension FITS file into single FITS files	fitsutil
gainfac	- Calculate analog gain factors.	hsp
gainmeasure	- Measure gains in quadformat images	quadred
galactic	- Convert ra, dec to galactic coordinates	astutil
galeq	- convert IAU 1958 galactic to equatorial FK5 coordinates	slalib
gallist	- Make an artificial galaxies list	artdata
galprofpars	- Pset with parameters for galaxy profile function.	fitting
galsup	- convert IAU 1958 galactic to deVaucouleurs supergalactic coordinates	slalib
games	- VII.I Using the Computers at CTIO (appendix)	index
gapfill	- Fill gaps in GONG time series.	grtools
garg[bcsilrdx]	- Get scan argument	fmtio
gargrad	- Get scan argument in any numerical radix	fmtio
gargstr	- Get scan argument of type string	fmtio
gargtok	- Get scan argument of type token	fmtio
gargwrd	- Get scan argument of type word	fmtio
gasp	- Access the HST Guide Star Catalog on CD-ROM.	analysis
gauss	- Convolve a list of 1 or 2-D images with an elliptical Gaussian	imfilter
gaussfit	- Least squares and robust estimation program.	contrib
gausspars	- Pset with parameters for Gaussians function.	fitting
gbias	- Process and combine GMOS bias images	gmos
gcombine	- Combine a set of GEIS images into one image	imgtools
gcopy	- Generic multi-group copy utility.	imgtools
gctod	- General character to double	fmtio
gctol	- General character to long (any radix)	fmtio
gdevices	- List available imaging or other graphics devices	plot
ge50	- convert IAU 1958 galactic to equatorial FK4 coordinates	slalib
geis	- Provide background information about GEIS format files	fitsio
gemarith	- Generic arithmetic on MEF images or spectra	gemtools
gemcombine	- Combine MEF files	gemtools
gemhedit	- Add header keyword, value and comment	gemtools
gemoffsetlist	- List processing for offsets (normally not used by the user)	gemtools
gemqa	- Gemini data quality assessment	gemtools
gemseeing	- Determine the image quality for imaging data	gemtools
gemtools	- Generic tools developed for Gemini observations	gemini
gemvsample	- Verify sky sample (hidden task)	gemtools
gencal	- generates synthetic calibration image from polynomial	velcal
generic	- Generic image reductions tools	imred
generic	- Preprocess a generic source file	softools
genvim	- Generate velocity, intensity, and modulation images	model
genwave	- Interactively generate a wavelength set.	synphot
geoc	- convert geodetic to geocentric position	slalib
geom	- A more robust fndlmb program	gongcor
geomap	- Compute geometric transforms using matched coordinate lists	immatch
geotran	- Transform 1-D or 2-D images using various mappinng transforms	immatch
geoxytran	- Transform coordinate lists using the geomap transforms	immatch
get_global	- Extract the value of a parameter for all components in a db	aspec
getc	- Get the next character from a file	fio
getcal	- calculates the wide-band and narrow-band correction images	velcal
getcal	- Populate a pset with calibration parameter values.	ctools
getdatatype	- Convert type suffix character to TY_ type code	xtools
getimage	- get an image from the CD-ROM all sky survey	gasp
getline	- Get the next line from a text file	fio
getpds	- Transfer pds files with TFTP	nlocal
getpix	- VII.I Using the Computers at CTIO (appendix)	index
getsqib	- Extract the squibby brightness image from a full disk scan.	vtel
getsqib	- Extract the squibby brightness image from a full disk scan.	vtelold
getuid	- Get the name of the runtime user of a program	etc
gevt2rdf	- Converts a German _events dataset to RDF _bas format	rosat
gextverify	- Verify extension input (hidden task)	gemtools
gfapsum	- Combine GMOS IFU spectra over a spatial region	gmos
gfcube	- Resample extracted IFU spectra onto an x-y-lambda datacube	gmos
gfdisplay	- Reconstruct, display and analyse extracted GMOS IFU spectra	gmos
gfextract	- Extract GMOS IFU spectra with optional correction for	gmos
gfit1d	- Interactive 1-d linear curve fit to images, tables or lists.	fitting
gflush	- Flush any buffered graphics output	language
gfquick	- Quick reconstruction of GMOS IFU images of acquisition	gmos
gfreduce	- Apply processing steps to GMOS IFU data	gmos
gfresponse	- Derive relative fiber throughputs for the GMOS IFU	gmos
gftoxdim	- Convert a GEIS file to one with xtra dimension plus a table	fitsio
gftransform	- Wavelength calibrate GMOS IFU spectra	gmos
ggain	- Correct gain and read-noise for GMOS images (hidden task)	gmos
ghkdump	- Display GIS housekeeping parameters of the GIS HK file	asca
giflat	- Derive flat field for GMOS images (IMAGING mode only)	gmos
gimpcor	- Show magnitude of the calfos gimp correction.	fos
gimverify	- Verify input/output image names (hidden task)	gemtools
gireduce	- Reduce images from GMOS (overscan, trim, bias, dark, flat)	gmos
gisrti	- Compute Rise Time Invariant value in GIS PH mode science file	asca
gki2cad	- Convert GKI metacode files into autoCAD DXF files	ctio
gki2mng	- Convert a GKI metacode file to MONGO input	mtools
gkidecode	- Decode metacode on the standard output	plot
gkidir	- Directory listing of metacode file	plot
gkiextract	- Extract individual frames from metacode file	plot
gkimosaic	- Condense metacode frames to fit on one page	plot
gltoc	- General long to character (any radix)	fmtio
gmos	- Reduction tasks for GMOS data	gemini
gmosaic	- Mosaic the 3 GMOS CCDs into one image	gmos
gmosexamples	- Print reduction examples to the screen	gmos
gmosinfo	- Generic tasks and general information about GMOS	gmos
gmosinfoifu	- Reduction of IFU data from GMOS	gmos
gmosinfoimag	- Reduction of imaging data from GMOS	gmos
gmosinfospec	- Reduction of longslit and MOS data from GMOS	gmos
gmst	- convert from UT1 to GMST	slalib
gmsta	- convert from UT1 to GMST while minimizing rounding errors	slalib
gnsskysub	- Nod-and-Shuffle shift and sky-subtraction of GMOS spectra	gmos
gongcor	- GONG instrument and atmosphere corrections (jp)	grasp
gpflat	- Flat field GONG+ intensity images	gongcor
gprep	- Transform shifts for one WFPC2 chip into parameters for mosaicing all four chips.	dither
gprepare	- Prepare raw GMOS data for reductions	gmos
gqaplot	- ASCA GIS quick analysis ftool ***	asca
gradient	- Convolve a list of 1 or 2-D images with a gradient operator	imfilter
grafcheck	- Check an instrument graph table for bad rows.	synphot
graflist	- List the components downstream from a given component.	synphot
grafpath	- Print keywords and component names for a path through	synphot
grafplot	- Plot the components downstream from a given component.	sobsolete
grafplot	- Plot the components downstream from a given component.	synphot
graph	- Graph one or more image sections or lists	plot
gratings	- Compute and print grating parameters	astutil
gregister	- Register 1-D or 2-D images using the geomap transforms	immatch
grflat	- Flat field intensity images	gongcor
grhistory	- Write GRASP history into image header (ea)	grasp
grid	- Create a grid to take frame distortion into account.	taucal
grid_file	- description of grid and trimming limits file	suntrans
grid_plot	- Plot the chisquared grid with contour lines.	xspectral
gripes	- Send suggestions, complaints, etc. to the system	system
grlist	- Parse a group format image section.	stplot
gro	- Compton Gamma Ray Observatory specific package	ftools
growthcurve	- Correct magnitudes using the growth curve for them	ctio
grppha	- Manipulates OGIP standard PHA FITS file	heasarc
grspec	- Interactively plot several images from a group format file.	stplot
grtools	- GONG Image and Spectral Analysis tools (ea)	grasp
gsacpts	- Accumulate points into a data set	gsurfit
gsappwave	- Add approximate wavelength calibration to the headers of	gmos
gscalibrate	- Apply flux calibration and extinction correction to	gmos
gscoeff	- Get coefficients	gsurfit
gscopy	- Copy one surface to another	gsurfit
gscrmask	- Make mask file for gscrrej (hidden task)	gmos
gscrrej	- Clean spectroscopic data for cosmic ray hits	gmos
gscut	- Cut GMOS MOS spectra into 2D pieces	gmos
gsetsec	- Update datasec header keyword (hidden task)	gemtools
gsextract	- Extract GMOS MOS or longslit spectra to 1D	gmos
gsflat	- Derive flat field for GMOS spectra based on GCAL lamp exposures	gmos
gsfree	- Free space allocated by gsinit	gsurfit
gsinit	- Make ready to fit a surface; set up parameters of fit	gsurfit
gsreduce	- Reduce spectra from GMOS (overscan, trim, bias, dark, mosaic,	gmos
gsrestore	- Restore surface parameters and coefficients	gsurfit
gssave	- Save surface parameters and coefficients	gsurfit
gsskysub	- Skysubtract GMOS spectra (longslit or MOS)	gmos
gsstandard	- Establish spectrophotometric calibration for GMOS spectra	gmos
gsstati	- Get integer parameter	gsurfit
gssub	- Subtract one surface from another	gsurfit
gstatistics	- Compute and print image pixel statistics for all groups.	imgtools
gstransform	- Rectify and/or wavelength calibrate GMOS spectra	gmos
gstrcat	- String concatenation returning length of output string	fmtio
gstrcpy	- String copy returning length of output string	fmtio
gstrdetab	- Remove tabs from a string	xtools
gstrentab	- Put tabs in a string where possible	xtools
gstrsettab	- Set tab stops for gstrdetab, entab.	xtools
gsurfit	- IRAF general surface fitting package	math
gsvector	- Evaluate surface at an array of x and y	gsurfit
gswavelength	- Establish wavelength calibration for GMOS spectra	gmos
gszero	- Zero arrays for new fit	gsurfit
guesspar	- Estimate freq., FWHM & amplitude of a mode given n,l,m.	grtools
guide	- Guide to using DIMSUM with the REDUCE task	dimsum
guide	- Guide to using xdimsum with the xmosaic task	xdimsum
guide	- Guide to using xdimsum with the xmosaic task	xirred
guide	- Introductory guide to using the CCDRED package	ccdred
guide	- Introductory guide to using the CCDRED package	quad
guide	- Introductory guide to using the CCDRED package	quadred
guide	- Introductory guide to using the CCDRED package	xccdred
h2e	- convert azimuth and elevation to hour angle and declination (s.p.)	slalib
h2fk5	- Convert equatorial ICRS to FK5 coordinates	slalib
hafton	- Generate half-tone plots of an image	plot
hangs	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
hdbexamine	- Examine a help database	softools
hdfit	- Fit a curve to density, log exposure values	dtoi
hdiff	- Display the differences between two image headers.	headers
hdshift	- Align related HD curves	dtoi
hdtoi	- Apply DTOI transformation to density image	dtoi
head	- Print the first few lines of a text file	system
head_remake	- remake image headers for different instrument's data (SRCsupport)	suntrans
heasarc	- High Energy/Astro-D Mission data manipulation package	ftools
helio	- Compute heliocentric Julian date	ctio
helio_image	- description of images on a heliographic coordinate system.	suntrans
help	- I.4 Tutorial #1 IRAF Structure (irafintro)	index
help	- I.6 Tutorial #3 Handling Images (irafintro)	index
help	- Print online documentation	system
hfilter	- Adaptive low-pass filter based on H-transform.	restore
hfix	- Fix image headers with a user specified command	proto
hfk5z	- Convert equatorial ICRS to FK5 coordinates (0 ICRS proper motions)	slalib
hgeom	- Determine figure of the limb using Hankel geometry routine	gongcor
hidetask	- Make a task invisible to the user	language
histed	- Help page for the history and ehistory commands	manuals
histogram	- Plot or list the histogram of a table column, image, or list.	stplot
histogram_file	- description of histogram files (help file only-no task)	suntrans
history	- Display commands previously executed	language
hkexpand	- Expand a compressed format housekeeping (HK) data file	heasarc
hkfilter	- generate a QPOE time filter from an input housekeeping filter	xdataio
hkscale	- Scales a FITS housekeeping data file into physical values	heasarc
hkunexpand	- Compress an expanded format houskeeping (HK) data file	heasarc
hltorgb	- Transform brightness and hue to red, green, and blue.	sdisplay
hriexpmap	- Creates exposure map for given ROSAT HRI observational dataset	rosat
hrs	- Tasks for calibrating HRS data.	hst_calib
hselect	- Select a subset of images satisfying a boolean expression	imutil
hstephem	- Convert ST orbit ephemeris file to an STSDAS table.	ctools
hstpos	- Plot the position of HST on a map of the world	playpen
hsubtract	- Baade-Lucy background subtraction algorithm.	playpen
htranslate	-	fts
hxflux	- Calculates the flux and luminosity for a ROSAT HRI source.	xspectral
hydra	- KPNO HYDRA (and NESSIE) reduction package	imred
i2gaussfit	- Iterative 2-d Gaussian fit to noisy images (script).	fitting
i2sun	- Convert IRAF images to Sun rasterfiles	vol
icfit	- Interactive curve fitting package	xtools
icntr	- Create center coordinate file	fabry
idcombine	- Create calibration darks using IR dark group files	xirred
identify	- Identify arc lines and determine a dispersion function	ctioslit
identify	- Identify arc lines and determine a dispersion function	kpnocoude
identify	- Identify arc lines and determine a dispersion function	kpnoslit
identify	- Identify features	longslit
identify	- Identify features in spectrum for dispersion solution	argus
identify	- Identify features in spectrum for dispersion solution	hydra
identify	- Identify features in spectrum for dispersion solution	iids
identify	- Identify features in spectrum for dispersion solution	irs
identify	- Identify features in spectrum for dispersion solution	onedspec
identify	- Identify features in spectrum for dispersion solution	specred
idmeans	- Do statistics for IR dark images	xirred
ids	- IDS data reduction	spec1
ids	- IDS data reduction	spec2
ids	- Quick-look IDS data reduction	quickie
ieee	- IEEE signal processing routines	math
ifcombine	- Create calibration flats using IR flat group files	xirred
ifgroup	- Group dark and linearity corrected IR flat images	xirred
iflatdiv	- Flat field dark and linearity corrected IR images	xirred
ifmeans	- Do statistics for dark and linearity corrected IR flat images	xirred
igi	- Interactive Graphics Interpreter.	stplot
igi	- Interactive Graphics Interpreter.	tbplot
iids	- KPNO IIDS spectral reductions	imred
iii	- transforms phase velocity, modulation amplitude, and mean	velcal
iiivim	- Transform 3 phase intensity images to	gongcor
iis	- IIS image display control package	tv
ilincor	- Linearity correct dark corrected IR images	xirred
illumination	- Determine illumination calibration	ctioslit
illumination	- Determine illumination calibration	kpnocoude
illumination	- Determine illumination calibration	kpnoslit
illumination	- Determine illumination calibration	longslit
illumination	- Determine illumination calibration	specred
ils	- Iterative Least Squares image restoration.	playpen
im2gki	- Send an image to a IRAF GIO graphics device.	sdisplay
im3dtran	- 3d image transpose (used for rotates as well)	vol
im3dtran	- Transpose a list of 3-D images	imgeom
im3dtrans	- change the subscript ordering in the ttrans output files	suntrans
images	- General image processing package	clpackage
images	- I.6 Tutorial #3 Handling Images (irafintro)	index
imagfe	- Register using common features of image data.	registration
imagree	- Change header keywords to agree with the image name.	sobsolete
imalign	- Align and register 2-D images using a reference pixel list	immatch
imcalc	- Perform general arithmetic operations on images.	imgtools
imcctran	- Transform image header from one celestial wcs to another	imcoords
imcentroid	- Compute and print relative shifts for a list of 2-D images	immatch
imcntr	- Locate the center of a stellar image	proto
imcnts	- count photons (with bkgd subtraction) in regions	xspatial
imcombine	- Combine images pixel-by-pixel using various algorithms	immatch
imcompress	- Compress IRAF image pixel file	compression
imcompress	- Compress an IRAF image by pixel summation	ximages
imcontour	- display a contour map of an image using wcs	xplot
imcoords	- Image coordinates package	images
imcopy	- Copy an image	imutil
imcreate	- Create an image	ctio
imcreate	- Create an image from a binary file or a constant value	ximages
imdetect	- determine rough positions of sources in the field	xproto
imdisp	- display pixel values in regions	xspatial
imdisp_pos	- Determine image location in image display.	sdisplay
imdivide	- Image division with zero checking and rescaling	imutil
imdkern	- Image display device (IMD) graphics kernel	plot
imedit	- Examine and edit pixels in images	tv
imedit	- VII.H Using IMEDIT to Fix Pixels (appendix)	index
imexamine	- Examine images using image display, graphics, and text	tv
imexamine	- I.7 Tutorial #5 Displaying Images (irafintro)	index
imexpr	- Evaluate a general image expression	imutil
imexpr	- Image Expressions in the CL	doc
imextensions	- Make a list of image extensions	proto
imextract	- Extract a list of image sections from an image	ctio
imextreme	- Locates the maximum and minimum pixels in an image.	dither
imfill	- Set fill value in image according to a mask.	imgtools
imfilter	- Image filtering package	images
imfit	- Image fitting package	images
imfunction	- Apply a single argument function to a list of images	imutil
img2us	- Converts from German Image file format to US RFITS format	rosat
imgeom	- Image geometric transformation package	images
imgets	- Return the value of an image header parameter as a string	imutil
imgscale	- Calibrate aperture plate scale (location phase II).	hsp
imheader	- Print an image header	imutil
imhistogram	- Compute and plot or print an image histogram	imutil
iminfo	- Print an instrument-specific header for a list of GEIS images	headers
iminsert	- Insert an image into another by either adding,	imgtools
imio	- Introduction to IRAF Image I/O	doc
imjoin	- Join images along a given dimension	imutil
imjoin	- N-dimensional image join along arbitrary axis	vol
imkbadpix	- Create new bad pixel mask from calibration flats	xirred
imkdarks	- Create calibration darks from raw IR darks	xirred
imkeyname	- Rename an image using a name from a header keyword.	sobsolete
imkflats	- Create calibration flats from raw IR flats	xirred
imlintran	- Linearly transform a list of 2-D images	imgeom
immatch	- Image matching and combining package	images
immatch	- Match one or two dimensional images	ctio
immean	- Compute mean of an image and save value as task parameter.	playpen
imnode	- Remove node information from a IRAF image pixfile pathname	ximages
implot	- I.7 Tutorial #4 Implot Task (irafintro)	index
implot	- Plot lines and columns of images using cursors	plot
import	- Convert some other format to an IRAF image	dataio
imprnt	- Print image pixel values or image statistics	gongcor
improj	- perform rectangular projections on an image	xspatial
improject	- Project image along one axis decreasing the	imgtools
imred	- Image reductions package [up]	noao
imrename	- Rename one or more images	imutil
imreplace	- Replace a range of pixel values with a constant	imutil
imreplace	- Replace pixels in a range by a constant	misc
imreplicate	- Expand an IRAF image by pixel replication	ximages
imscale	- Scale an image to a specified (windowed) mean	proto
imslice	- Slice images into images of lower dimension	imutil
imsmooth	- smooth an image	xspatial
imspace	- Determine disk space used by IRAF images	ctio
imspec	- Convert an image to a synphot spectrum or vice versa.	synphot
imstack	- Stack images into a single image of higher dimension	imutil
imstatistics	- Compute and print statistics for a list of images	imutil
imsum	- Compute the sum, average, or median of a set of images	imutil
imtab	- Copy an image to a table column.	ttools
imtest	- Image headers and pixel files test	ctio
imtile	- Tile same sized 2D images into a 2D mosaic	imutil
imtitle	- Change the title of an image (noao.proto V2.9)	obsolete
imtranspose	- Transpose a list of 2-D images	imgeom
imuncompress	- Uncompress IRAF image pixel file	compression
imverify	- Verify that an image was copied correctly.	sobsolete
imxv	- apply a 3D reverse rotation to a 3-vector (s.p.)	slalib
incidence	- Calibrate incidence angle.	z_calib
info	- list catalog header information	ifocas
infostis	- Print information about STIS FITS files.	stis
inlfit	- Interactive non-linear least squares fitting package	xtools
install	- System Installation Guide	doc
instrpars	- edit instrument parameters	ccdacq
instrument	- access instrument	ccdacq
instruments	- Instrument specific data files	ccdred
instruments	- Instrument specific data files	quad
instruments	- Instrument specific data files	quadred
instruments	- Instrument specific data files	xccdred
int_qual	- intensity quality assurance parameter calculation	qasun
interf	- Compute interferometer numerator, denominator, brightness	model
interp	- Interpolate for a value in a table of X,Y pairs	proto
interp	- Old 1D image interpolation routines	math
intin	- convert a character string into an integer	slalib
intrep	- Find coordinates at the cursor.	gasp
intrinsicspecplot	- Plot the emitted and observed spectrum	xspectral
intro	- A brief introduction to IRAF	language
inttag	- Convert an events table of TIMETAG into an integrated	stis
intvel	- Interactive average velocity evaluation	fabry
inverse	- Compute inverse Fourier transform of an image.	fourier
invertfit	- Compute the standard indices by inverting the fit	photcal
invertfit	- Compute the standard indices by inverting the fit	xphotcal
invf	- invert the linear model computed from 2 sets of [x,y] coordinates	slalib
invmetric	- Translate RA & Dec to WF/PC pixel coordinates with geometric	wfpc
ionic	- Determine ionic abundance relative to H+	nebular
iraf2bin	- Convert IRAF images into binary files	ctio
irafil	- Create an IRAF image from a binary data file	proto
irafintro	- Manual Introduction and IRAF Tutorials	manuals
irafpacks	- IRAF Package Requirements	doc
irafplan	- IRAF Project Plan	doc
iralign	- Align the image produced by irmosaic	irred
iralign	- Align the mosaiced image produced by irmosaic	nproto
irdlfcor	- Dark subtract, linearity correct, and flat field IR images	xirred
irlincor	- Correct IR imager frames for non-linearity	ctio
irlincor	- Correct IR imager frames for non-linearity	irred
irlincor	- Correct frames for non-linearity	ared
irman	- Infrared Reduction Manual (in progress)	manuals
irmatch1d	- Align and intensity match image produced by irmosaic (1D)	nproto
irmatch1d	- Align and intensity match the image produced by irmosaic (1D)	irred
irmatch2d	- Align and intensity match image produced by irmosaic (2D)	nproto
irmatch2d	- Align and intensity match the image produced by irmosaic (2D)	irred
irmfringe	- Remove fringe pattern, possibly interactively, by scaling	mscred
irmfringe	- Remove fringe pattern, possibly interactively, by scaling	mscred
irmosaic	- Mosaic an ordered list of images onto a grid	irred
irmosaic	- Mosaic an ordered list of images onto a grid	nproto
irmpupil	- Remove pupil image, possibly interactively, by scaling	mscred
irmpupil	- Remove pupil image, possibly interactively, by scaling	mscred
ironphot	- Create a 2m ONIS IR standard star observations file	xphotred
ironsets	- Group 2m ONIS IR standard star images by filter	xphotred
irred	- KPNO IR camera reductions	imred
irs	- KPNO IRS spectral reductions	imred
isaac	- Interactive Spectral Analysis And Computation.	fts
iscoeff	- get coefficients of surface	surfit
iseval	- evaluate the surface at a point	surfit
isgroup	- Group one night's IR standard star observations	xirred
isinit	- initialize surface descriptor	surfit
isis	- ISIS data reduction	spec1
isis	- ISIS data reduction	spec2
isis	- Quick-look ISIS data reduction (either arm or both)	quickie
iskymeans	- Compute skymeans for a set of IR observations	xirred
islaccum	- accumulate surface at a given line number	surfit
islfit	- fit the surface at a given line number	surfit
islist	- List the IR standard star processing information	xirred
islrefit	- refit the surface at a given line number, same columns	surfit
islsolve	- solve the surface at a given line number	surfit
islzero	- zero the fit for a given line number	surfit
ismosaic	- Reduce a single IR standard star observation	xirred
isoexam	- Plot ellipses on the image display (interactive).	isophote
isomap	- Plot ellipses superposed over image contours.	isophote
isopall	- Plot summary of all results from isophotal analysis.	isophote
isophote	- Elliptical isophote image analysis.	analysis
isoplot	- Plot results of isophotal analysis.	isophote
isoreg	- create region mask by applying intensity levels to image data	xspatial
isred	- Reduce a single night of IR standard star observations	xirred
isresolve	- resolve surface, same lines	surfit
isshifts	- Compute shifts for a single IR standard star observation	xirred
itarr	- Read a tar file and extract contents	somtlocal
itart	- Read a tar file and list contents	somtlocal
iterstat	- Compute image statistics using iterative rejection	xdimsum
iterstat	- Compute image statistics using iterative rejection	xirred
iterstat	- Iteratively compute and print image statistics	nicmos
itob	- Convert integer to boolean	etc
itoc	- Integer to character	fmtio
jimage	- Create a jitter image from U2,U3 coordinates in a table.	playpen
jobs	- Display status of background jobs	language
jobs	- I.3 A Quick View of IRAF (irafintro)	index
joinlines	- Join text files line by line	proto
keep	- Make recent set, task, etc. declarations permanent	language
keypar	- Copy an image or table header keyword to an IRAF parameter.	ttools
keytab	- Copy an image or table header keyword to a table element.	ttools
keywpars	- Translate the image header keywords used in ASTUTIL package	astutil
keywpars	- Translate the image header keywords used in RV package	rv
ki	- Kernel interface (networking)	sys
kill	- Kill a background job	language
kmestimate	- Compute the Kaplan-Meier estimator of a randomly censored	statistics
kolmov	- Kolmogorov-Smirnov test for goodness of fit.	statistics
kpnocoude	- KPNO coude reduction package (slit and 3 fiber)	imred
kpnofocus	- Determine the best focus from KPNO focus images	nmisc
kpnoslit	- KPNO low/moderate dispersion slits (Goldcam, RCspec, Whitecam)	imred
ksplot	- plot observed & model cdf's and their difference	xtiming
lambda	- List wavlength and pixel values	ctio
lan4mphot	- Create a 4m MOSAIC Landolt standard star observations file	xphotred
lan4msets	- Group 4m MOSAIC Landolt standard star images by filter	xphotred
language	- The command language itself	clpackage
laplace	- Laplacian filter a list of 1 or 2-D images	imfilter
lat_sin	- interpolate registered image onto a different lat-long grid (SRCsupport)	suntrans
latex	- VII.I Using the Computers at CTIO (appendix)	index
lbmap	- makes a local background map	detect
lcalib	- List calibration file data	iids
lcalib	- List calibration file data	irs
lcalib	- List calibration file data	longslit
lcalib	- List calibration file data	onedspec
lcase	- Convert a file to lower case	utilities
lcode	- Report statistics on SPP or Fortran programs	nlocal
ldetect	- 'canned' local detect task	detect
ldumpf	- List the permanent files on a Cyber DUMPF tape	mtlocal
lexnum	- Lexically analyze a string to determine if it is a number	fmtio
lgaperloc	- Calibrate location of a large aperture (location phase III).	hsp
lgrlist	- Expand a list of images and group numbers	playpen
line_sel	- Build a db of lines from a line list	aspec
linebias	- Fit and subtract an average line bias	bias
lineclean	- Replace deviant pixels in image lines	imfit
linefind	- Find spectral lines for wavelength calibration.	y_calib
linelists	- Description of the spectral line list library in	onedspec
linenum	- Prepend an integer to each line of a file	nlocal
link	- Help page for linking between computers at CTIO	manuals
linmatch	- Match the linear intensity scales of 1-D or 2-D images	immatch
linpol	- Calculate polarization frames and Stoke's parameters	nproto
lintran	- Linearly transform a coordinate list	apphot
lintran	- Perform linear transformation of a list	lists
list_col	- list collator for qa output	qasun
list_file	- description of ts_merge input list (help file only-no task)	merge
listarea	- Print an area of an image.	imgtools
listpixels	- Convert an image section into a list of pixels	imutil
listprimes	- Display first N prime numbers.	fourier
lists	- List processing package	clpackage
llsq	- Lawson's & Hanson's linear least squares package	math
lm_file	- description of l-m pair file for extract	suntrans
lmap	- Compute the photocathode mapping function	z_calib
lmatchsrc	- match sources between and within different detect cell sizes	detect
lmbcor	- Correct the figure of the limb of the solar image	gongcor
lmbsta	- Calculate statistics for an elliptic data window	gongcor
lnudiagram	- Produce an L-Nu diagram from power spectra.	grtools
load	- I.3 A Quick View of IRAF (irafintro)	index
load	- I.4 Tutorial #1 IRAF Structure (irafintro)	index
logging	- Discussion of CL logging	language
login	- I.2 Login and logout (irafintro)	index
login	- VII.I Using the Computers at CTIO (appendix)	index
logout	- I.2 Login and logout (irafintro)	index
logout	- Log out of the CL	language
logout	- VII.I Using the Computers at CTIO (appendix)	index
logtex	- Convert running log into a LaTeX file	spec1
logtex	- Convert running log into a LaTeX file	spec2
longplot	- Make a long, accurately scaled plot	nlocal
longslit	- Longslit Package	twodspec
loop_blot	- Runs blot for a given list of input and output images.	dither
loop_driz	- Runs drizzle for a list of input, output, and mask images.	dither
lowpars	- Pset for setting the low-pass filter parameters used in the	restore
lparam	- I.3 A Quick View of IRAF (irafintro)	index
lparam	- List the parameters of a task	language
lpeaks	- determine the rough source positions from a snrmap	detect
lpopen	- Open the line printer as a file	etc
lprint	- Print a file on the line printer device	system
lroff	- Lroff (line-roff) text formatter	softools
ltcplot	- plot a ltc table (output of ltcurv)	xtiming
ltcurv	- compute count rates of binned source and bkgd	xtiming
ltoc	- Long to character	fmtio
lucy	- Deconvolve an image using Leon Lucy's algorithm.	restore
lutreplace	- Replace (short integer) pixel values from a lookup table	nlocal
m2av	- convert a rotation matrix to an axial vector (s.p.)	slalib
mag	- Calculate magnetogram	velcal
magavg	- Average output from MAGBAND for a single object	ctio
magband	- Compute the average magnitude for a list of bandpasses	ctio
magnify	- Magnify a list of 1-D or 2-D images	imgeom
magshiftfix	- Mosaicing program using sub-pixel replication and masking	dimsum
mail	- Help page for sending mail to the States	manuals
mail	- VII.I Using the Computers at CTIO (appendix)	index
main	- The IRAF Main	etc
makehelium	- Cl script for processing destreaked 10830 grams(second pass).	vtel
makehelium	- Cl script for processing destreaked 10830 grams(second pass).	vtelold
makeimages	- Cl script for processing magnetograms into projected maps	vtel
makeimages	- Cl script for processing magnetograms into projected maps	vtelold
makemask	- Make an object mask for a single image	xdimsum
makemask	- Make an object mask for a single image	xirred
maketime	- Calculate time intervals (GTIs) from housekeeping (HK) data	time
makevig	- generate a vignetting mask file from calibration data	xspatial
makewcs	- Write the WCS on the image header based on the plate sol.	gasp
manuals	- CTIO manuals	ctio
map	- convert a post IAU 1976 mean to geocentric apparent place	slalib
mappa	- precompute the set of mean to geocentric apparent place parameters	slalib
mapqk	- convert a post IAU 1976 mean to geocentric apparent place	slalib
mapqkz	- convert a post IAU 1976 mean to geocentric apparent place	slalib
marfrmf	- Multiplies an ancillary response file by a redist matrix	caltools
markdq	- Mark DQ flags on a displayed image.	nicmos
marx2qpoe	- convert MARX EVENT FITS to QPOE file	xproto
mask_head	- Attach mask names to image headers; invert mask if requested	dither
maskalign	- Take JLC-style input, derive alignment solution (superceded)	ucsclris
maskdereg	- Deregister master object mask to individual object masks	xdimsum
maskdereg	- Deregister master object mask to individual object masks	xirred
maskdereg	- Deregister master object mask to many masks for individual frames	dimsum
maskdisk	- mask image on a heliographic coordinate system with (SRCpiece)	suntrans
maskfix	- Fix bad pixel in images using a bad pixel mask	xdimsum
maskfix	- Fix bad pixel in images using a bad pixel mask	xirred
maskstat	- Compute mask statistics using iterative rejection	xdimsum
maskstat	- Compute mask statistics using iterative rejection	xirred
match	- Print all lines in a file that match a pattern	system
mathfcns	- Mathematical routines	language
mathpha	- Performs mathematical operations on PHA files	heasarc
matphot	- CCD stellar photometric reduction using a MATPHOT PSF file.	mxtools
matrix	- How to make slides and photos with the matrix camera	nlocal
mboxfind	- Find box and star positions; putput in JLC form (superceded)	ucsclris
mchmag	- change magnitude zero points in matched catalog	ifocas
median	- Median box filter a list of 1D or 2D images	imfilter
mem	- Deconvolve an image by the Maximum Entrophy Method (MEM).	restore
memio	- Memory i/o (dynamic memory allocation)	sys
merge	- Merge daily grams into a Carrington map.	vtel
merge	- Merge daily grams into a Carrington map.	vtelold
mergecar	- Merge and bin spectra from different carrousel positions.	z_calib
metric	- Translate WF/PC pixel coordinates to RA & Dec with geometric	wfpc
mextract	- extract a single catalog from a matched catalog	ifocas
mfit	- Anitia's a-coefficient fitting routine.	grtools
mgtime	- Merge 2 or more time interval (GTI) files	time
midut	- Compute UT at midpoint of observation	ctio
minfo	- list matched catalog header information	ifocas
minmax	- Compute the minimum and maximum pixel values in an image	imutil
missions	- list of missions and instruments support by PROS	xray
mjoin	- Join lines in text files by matching them	ctio
mk(n)obsfile	- Prepare an oservations file from apphot/daophot output	photcal
mk(n)obsfile	- Prepare an oservations file from apphot/daophot output	xphotcal
mk2dspec	- Make/add artificial 2D spectra using 1D spectra templates	artdata
mka2d	- Create or modify an A-to-D correction reference file for WF/PC.	w_calib
mkapfile	- Prepare aperture corrections file from apphot/daophot output	photcal
mkapfile	- Prepare aperture corrections file from apphot/daophot output	xphotcal
mkcaldb	- Create a Calibration Database	caltools
mkcalinit	- Create a caldbinit file	caltools
mkcatalog	- Type in a standard star catalog or observations file	photcal
mkcatalog	- Type in a standard star catalog or observations file	xphotcal
mkconfig	- Prepare a configuration file	photcal
mkconfig	- Prepare a configuration file	xphotcal
mkcube	- Combine 2D images into a cube	fabry
mkdark	- Create a dark by combining images to get rid of cosmic rays.	wfpc
mkdir	- Create a new directory	system
mkdtime	- Calculates the deadtime fractions for the GIS	asca
mkechelle	- Make artificial 1D and 2D echelle spectra	artdata
mkerr	- Make an error file for an input frame	sam
mkfringecor	- Make fringe correction images from sky images	ccdred
mkfringecor	- Make fringe correction images from sky images	quad
mkfringecor	- Make fringe correction images from sky images	quadred
mkfringecor	- Make fringe correction images from sky images	xccdred
mkfringeflat	- Matching fringes in STIS fringe flat to those in science data.	stis
mkfunc	- Create analytic form test data (image).	sobsolete
mkgauss	- Generate a 2-D image having an object of Gaussian type.	imgtools
mkheader	- Append/replace header parameters	artdata
mkhistogram	- List or plot the histogram of a data stream (noao.proto V2.9)	obsolete
mkhkscr	- generate a housekeeping (TSI) filter	xdataio
mkillumcor	- Make flat field illumination correction images	ccdred
mkillumcor	- Make flat field illumination correction images	quad
mkillumcor	- Make flat field illumination correction images	quadred
mkillumcor	- Make flat field illumination correction images	xccdred
mkillumflat	- Make illumination corrected flat fields	ccdred
mkillumflat	- Make illumination corrected flat fields	quad
mkillumflat	- Make illumination corrected flat fields	quadred
mkillumflat	- Make illumination corrected flat fields	xccdred
mkimsets	- Prepare an image set file for input to (mk)(n)obsfile	photcal
mkimsets	- Prepare an image set file for input to (mk)(n)obsfile	xphotcal
mklorentz	- Make a smooth Lorentzian spectrum.	grtools
mklut	- Generate a lookup table for image display.	sdisplay
mkmanpage	- Make a manual page	softools
mkmask	- Create the initial master object mask	xdimsum
mkmask	- Create the initial master object mask	xirred
mkmnu	- Make a smooth M-Nu spectrum.	grtools
mkms	- Create multispec from 1D spectra including associated bands	nproto
mkmsc	- Make multiextension mosaic format from flat formats	mscred
mkmsc	- Make multiextension mosaic format from flat formats	mscred
mkmultispec	- Combine wavelength and data with the MULTISPEC MWCS.	ctools
mknoise	- Make/add noise and cosmic rays to 1D/2D images	artdata
mkobjects	- Make/add artificial stars and galaxies to 2D images	artdata
mkpattern	- Make/add patterns to images	artdata
mkphotcors	- Prepare the photometric corrections files	photcal
mkphotcors	- Prepare the photometric corrections files	xphotcal
mkphottb	- Create a synthetic photometry lookup table for WF/PC.	w_calib
mkpkg	- Make or update an object library or package	softools
mkqsrc	- Adds extra fields for quality screening to ROSAT source file	rosat
mkscript	- Make a command script	system
mksens	- Create a sensitivity file	spec1
mksens	- Create a sensitivity file	spec2
mkshift	- Make a script to shift images to common positions	fabry
mkskycor	- Make sky illumination correction images	ccdred
mkskycor	- Make sky illumination correction images	quad
mkskycor	- Make sky illumination correction images	quadred
mkskycor	- Make sky illumination correction images	xccdred
mkspec	- Make an artificial power spectrum [and time series].	grtools
mkspec	- Generate an artificial spectrum	iids
mkspec	- Generate an artificial spectrum	irs
mkspec	- Generate an artificial spectrum (obsolete)	onedspec
mktags	- Tag all procedure declarations in a set of files	softools
mktemp	- Make a temporary (unique) file name	language
mktemp	- Make a unique temporary filename	fio
mkthru	- Create a throughput table for installation in CDBS	synphot
mkttydata	- Build cache for termcap/graphcap device entries	softools
mkvmw	- Make a window function image for a times series data set.	grtools
mkwave	- Make a time series of a sampled sine wave.	grtools
mkweight	- Make a simple weighting file for use in task specalign.	ctools
mod_qual	- modulation quality assurance parameter calculation	qasun
modalid	- Print the space craft modal configuration	asca
modecoef_file	- description of mode coefficient file (help file only-no task)	suntrans
modediag	- make separate real and imaginary mode coefficient files (SRCsupport)	suntrans
model	- Solar and Instrument modelling programs (jp)	grasp
modelpars	- Pset for setting model parameters used in the wiener task.	restore
models_spectral	- for information about spectral models	xspectral
modeone	- Restore and display mode I target acquisition images.	sobsolete
mongo	- VII.I Using the Computers at CTIO (appendix)	index
monitor	- Reduce particle monitor data obtained from HSP.	hsp
monochrome	- Select monochrome enhancement	iis
moon	- compute approximate geocentric position/velocity of moon	slalib
mores	- make a series of observations with current parameters	ccdacq
mosaic_display	- Display many images in a single image display buffer.	sdisplay
mosdisplay	- Display a mosaic of MultiAccum image readouts.	nicmos
mosproc	- Prepare images for quick look mosaicing	irred
mostools	- Package for GMOS mask preparation	gmos
moveheader	- Combine the header and pixels from two images,	imgtools
movie	- Display successive planes from a 3d SLDC	ndprogs
mpeakfind	- Find peaks in a power spectrum (user supplied guessing)	grtools
mperfits	- convert from MPE/MIDAS FITS IMAGE to IRAF image format w/ WCS	xdataio
mrotlogr	- Log some header parameters from a FITS rotation map tape.	vtel
mrotlogr	- Log some header parameters from a FITS rotation map tape.	vtelold
msarith	- Image arithmetic with NICMOS and STIS files	mstools
msbadpix	- Detects bad pixels in STIS and NICMOS images.	ctools
msbadpix	- Detects bad pixels in STIS and NICMOS images.	nicmos
mscan	- Read all sector scans on a tape and put them into images.	vtel
mscan	- Read all sector scans on a tape and put them into images.	vtelold
mscblkavg	- Block average mosaic exposures with header keyword updating	mscred
mscblkavg	- Block average mosaic exposures with header keyword updating	mscred
mscblkavg	- Block average mosaic exposures with header keyword updating	multampccd
mscblkavg	- Block average mosaic exposures with header keyword updating	multampccd
msccmatch	- Match coordinates from list by adjusting WCS	mscred
msccmatch	- Match coordinates from list by adjusting WCS	mscred
msccmd	- Execute general command with image extension expansion	mscred
msccmd	- Execute general command with image extension expansion	mscred
msccmd	- Execute general command with image extension expansion	multampccd
msccmd	- Execute general command with image extension expansion	multampccd
mscctran	- Celestial coordinate transformation using plate solution	mscred
mscctran	- Celestial coordinate transformation using plate solution	mscred
mscdisplay	- Display mosaic exposures in single frames	mscred
mscdisplay	- Display mosaic exposures in single frames	mscred
mscdisplay	- Display mosaic exposures in single frames	multampccd
mscdisplay	- Display mosaic exposures in single frames	multampccd
mscexamine	- Examine mosaic exposures displayed as single frames	mscred
mscexamine	- Examine mosaic exposures displayed as single frames	mscred
mscexamine	- Examine mosaic exposures displayed as single frames	multampccd
mscexamine	- Examine mosaic exposures displayed as single frames	multampccd
mscfinder	- Package to do astrometry on mosaic data	mscred
mscfinder	- Package to do astrometry on mosaic data	mscred
mscfindgain	- Calculate the gain and readout noise of a mosaic of CCD	mscred
mscfindgain	- Calculate the gain and readout noise of a mosaic of CCD	mscred
mscgetcatalog	- Get coordinates from a Web server covering mosaic exposures	mscred
mscgetcatalog	- Get coordinates from a Web server covering mosaic exposures	mscred
mscguide	- Introductory guide to using the MSCRED package	mscred
mscguide	- Introductory guide to using the MSCRED package	mscred
mscguide	- Introductory guide to using the MSCRED package	multampccd
mscguide	- Introductory guide to using the MSCRED package	multampccd
mscimage	- Reconstruct single images from a mosaic exposures	mscred
mscimage	- Reconstruct single images from a mosaic exposures	mscred
mscimatch	- Match intensity scales in reconstructed mosaic images	mscred
mscimatch	- Match intensity scales in reconstructed mosaic images	mscred
mscjoin	- Join separate images into MEF files	mscred
mscjoin	- Join separate images into MEF files	mscred
mscmedian	- Median filter mosaic exposures	mscred
mscmedian	- Median filter mosaic exposures	mscred
mscombine	- Combine NICMOS or STIS files using gcombine	mstools
mscopy	- Copy image sets of a multi-extension FITS file.	mstools
mscotfflat	- Built on-the-fly flat field calibrations	mscred
mscotfflat	- Built on-the-fly flat field calibrations	mscred
mscotfflat	- Built on-the-fly flat field calibrations	multampccd
mscotfflat	- Built on-the-fly flat field calibrations	multampccd
mscpixarea	- Compute and apply pixel area correction using WCS	mscred
mscpixarea	- Compute and apply pixel area correction using WCS	mscred
mscpupil	- Fit and remove pupil ghost from mosaic images	mscred
mscpupil	- Fit and remove pupil ghost from mosaic images	mscred
mscred	- Mosaic reduction package (development version = xmscred)	xdwred
mscsetwcs	- Reset WCS using astrometry database and/or RA/DEC keywords	mscred
mscsetwcs	- Reset WCS using astrometry database and/or RA/DEC keywords	mscred
mscskysub	- Fit a sky surface and subtract all but the mean	mscred
mscskysub	- Fit a sky surface and subtract all but the mean	mscred
mscsplit	- Split MEF files into separate images	mscred
mscsplit	- Split MEF files into separate images	mscred
mscstack	- Combine multiple reconstructed mosaic images	mscred
mscstack	- Combine multiple reconstructed mosaic images	mscred
mscstat	- Image statistics on mosaic image extensions	mscred
mscstat	- Image statistics on mosaic image extensions	mscred
mscstat	- Image statistics on mosaic image extensions	multampccd
mscstat	- Image statistics on mosaic image extensions	multampccd
msctvmark	- Mark coordinates from file on previous MSCDISPLAY	mscred
msctvmark	- Mark coordinates from file on previous MSCDISPLAY	mscred
mscwcs	- Set and adjust mosaic WCS	mscred
mscwcs	- Set and adjust mosaic WCS	mscred
msczero	- Display, measure coordinates, set WCS zeropoint offsets	mscred
msczero	- Display, measure coordinates, set WCS zeropoint offsets	mscred
msdel	- This script removes one (1) entire FITS imset from a FITS file.	mstools
mshift	- Quick solution of mask translation	ucsclris
msigeti	- Fetch an integer parameter	iminterp
msigetr	- Fetch a real parameter	iminterp
msisqgrl	- Calculate the integral inside a rectangle	iminterp
msitype	- Decode string into interpolant type and parameters	iminterp
msivector	- Evaluate interpolant at an array of x and y	iminterp
msjoin	- Joins files containing single IMSETs into one file	mstools
mskexpr	- Create masks using an expression and reference images	proto
mskregions	- Create or modify masks using regions lists	proto
msreadnoise	- Measures readout noise in STIS and NICMOS images.	ctools
msreadnoise	- Measures readout noise in STIS and NICMOS images.	nicmos
msresp1d	- Create 1D response spectra from flat field and sky spectra	argus
msresp1d	- Create 1D response spectra from flat field and sky spectra	hydra
msresp1d	- Create 1D response spectra from flat field and sky spectra	specred
msresp1d	- Create fiber response spectra from flat field and sky spectra	kpnocoude
mssort	- Sort a FITS file to get all extensions of like version number	mstools
mssplit	- Splits NICMOS or STIS IMSETs out into separate files	mstools
msstatistics	- "Extended" gstatistics for OIF, GEIS, NICMOS and STIS files	mstools
msstreakflat	- Processing of Earth streaked images for WFPC and NICMOS.	ctools
msstreakflat	- Processing of Earth streaked images for WFPC and NICMOS.	nicmos
mstat	- compute matching statistics from a matched catalog	ifocas
mstools	- General-purpose tasks that handle NICMOS IMSETs.	nicmos
mstools	- Tasks to handle STIS/NICMOS IMSETs.	imgtools
mtexamine	- Examine the structure of a magnetic tape	dataio
mtfcal	- compute mtf function and error for merge from k-r files	merge
mtlocal	- Magtape i/o for special NOAO format tapes [up]	noao
mvrefer	- Move reference files between systems	sobsolete
mxdemo	- A simple peak detector written in C using the MX & CVOS APIs	mxtools
mxv	- multiply a 3-vector by a rotation matrix (s.p.)	slalib
mysplot	- Version of SPLOT with line identifying features	mtools
n2gaussfit	- 2-d Gaussian fit to images.	fitting
names	- Generate a list of image names from a string	iids
names	- Generate a list of image names from a string	irs
names	- Generate a list of image names from a string	onedspec
nbcalc	- calculates narrow-band correction image	velcal
ndark	- Build NICMOS DARKFILE calibration reference file.	nicmos
ndisplay	- Display a science image with DQ flags superimposed.	nicmos
ndprep	- Make neutral density filter calibration image	onedspec
ndprogs	- nD and spectral line data cube manipulation package [down]	rgo
ndrift	- Process a set of noon drifts	drift
ndtrans	- Transpose the axes of an nD array	ndprogs
ndwfsget	- Extract FITS cutout images from the NDWFS survey	xastcat
nebular	- Tasks for analyzing nebular emission lines	analysis
netstatus	- Print the status of the local network	system
network_stat	- network window statistics	qasun
networking	- Provide background information about IRAF networking	sobsolete
newcont	- Draw contours of two-dimensional data.	stplot
newgeom	- Geometrically correct an image.	foc
newgeom	- Geometrically correct an image.	focgeom
newimexamine	- IMEXAMINE with new FWHM measurements	nmisc
newredshift	- Change the redshift of spectra	tools
newres	- new resolution classifier	ifocas
news	- Announcements of general interest	doc
news	- Page through the system news file	system
nfit1d	- Interactive 1-d non-linear curve fit to images, tables or lists.	fitting
ngaussfit	- Interactive 1-d multiple Gaussian fit to images, tables or lists.	fitting
nicmos	- Tasks for calibrating NICMOS data.	hst_calib
nicpipe	- Process images through various stages of CALNICA.	nicmos
nifastsky	- Derive sky image for NIRI, median or min/max filtering	niri
niflat	- Derive flat field and bad pixel mask for NIRI images	niri
nireduce	- Reduce images from NIRI (dark or sky subtraction, flat)	niri
niri	- Reduction tasks for NIRI data	gemini
niriexamples	- Print examples of reduction scripts to screen	niri
niriinfo	- General help and information for the NIRI package	niri
nisky	- Derive sky image for NIRI, includes masking of objects	niri
nlerrors	- Compute the fits statistics and errors in the parameters	nlfit
nleval	- Evaluate the curve at a given point	nlfit
nlevel	- Documentation on the N-level atom approximation	nebular
nlfit	- Fit the function	nlfit
nlfit	- IRAF Levenberg-Marquardt non-linear least squares package	math
nlfree	- Free memory allocated by nlinit	nlfit
nlincorr	- Build NICMOS NLINFILE calibration reference file.	nicmos
nlinit	- Initialize the fitting routines	nlfit
nlpget	- Get the values of the fitted parameters	nlfit
nlstat	- Get the value of an NLFIT parameter	nlfit
nlvector	- Evaluate the curve at an array of points	nlfit
noao	- The NOAO optical astronomy packages	clpackage
nobjects	- list the number of objects in categories from a catalog	ifocas
nobsolete	- Obsolete tasks to be phased out in a future release [up]	noao
noise	- Solve for noise model for a ccd chip	scp
noisemodel	- Determine noise model parameters from CCD frames.	wfpc
noisepars	- Pset for setting noise parameters used in the wiener task.	restore
normalize	- Enter normalization factors into cube image header	fabry
normalize	- Normalize images	generic
normclip	- Normalize WF/PC flat fields among chips.	w_calib
normflat	- Create a flat field by normalizing and replacing low values	generic
normspflat	- Normalize STIS CCD fringe flat.	stis
north	- Print the position angles of images.	ctools
note	- Note the long integer position in a file for a later seek	fio
nprepare	- Prepare NIRI data for reductions	niri
nproto	- Prototype (temporary, contributed) tasks [up]	noao
nsappwave	- Add approximate wavelength calibration to the headers	niri
nscan	- Get number of arguments successfully converted in last scan	fmtio
nscombine	- Combine NIRI spectra	niri
nscut	- Cut spectrum out of image frame	niri
nsextract	- Extract 1D and 2D NIRI spectra	niri
nsflat	- Derive flat field for NIRI spectra based on GCAL lamp exposures	niri
nslots	- Number of time slots between two epochs.	grtools
nsppkern	- Plot metacode on a NSPP (NCAR) plotter device	plot
nsreduce	- Reduce spectra from NIRI (dark, sky, flat, trim)	niri
nssdist	- Establish S-distortion for NIRI spectra	niri
nsstack	- Group NIRI data taken at the same offset position	niri
nstar	- Fit the psf to predefined groups of stars	daophot
nstransform	- Rectify longslit NIRI spectra	niri
nswavelength	- Establish wavelength calibration for NIRI spectra	niri
ntcontour	- Plot contours of N_e- or T_e-sensitive line ratios	nebular
ntplot	- Construct N_e vs. T_e plot for observed diagnostic ratios	nebular
nut	- compute the nutation matrix for a given date	slalib
nutc	- compute the nutation components for a given date	slalib
nwlimits	-	fts
nws	- Get the current National Weather Service forecast	nlocal
oap	- convert from observed to apparent place	slalib
oapqk	- convert from observed to apparent place	slalib
obackground	- View and plot statistics of reference frames	oscir
objcalib	- Photometrically calibrate an objective prism image.	focprism
objimages	- extract object images to individual subimages	ifocas
objmasks	- Detect objects in images and make masks	nproto
obs	- look up an entry in a list of groundbased observing stations	slalib
observatory	- Examine and define observatory parameters [up]	noao
observe	- Make an observation	ccdacq
obsfile	- Prepare an observations file from a text file	photcal
obsfile	- Prepare an observations file from a text file	xphotcal
obsmode	- A short explanation of the observation mode keywords	synphot
obspars	- edit observing parameters	ccdacq
obsum	- Produce brief, time-ordered summary of groups in data.	hrs
obsutil	- Observing utilities (planning or evaluation) [up]	noao
ocrreject	- Generate a STIS CCD image (images and spectra) free of	stis
odeadtimez	- Compute the HRS paired-pulse coefficients.	z_calib
offsets	- Builds cross-correlation image (shift only).	dither
ofixpix	- Fix bad pixels using text file (proto V2.10.4)	obsolete
ohead	- Print header information for OSCIR images	oscir
oimcombine	- IMCOMBINE from V2.11-V2.11.3	obsolete
olddither	- Older version (1.2) of dither	sobsolete
onedspec	- One dimensional spectral red & analysis package [up]	noao
onedstds	- Description of the spectral calibration library in the	onedspec
onerror	- Post a procedure to be executed if error recovery occurs	etc
onexit	- Post a procedure to be executed upon process shutdown	etc
open	- Open or create a text or binary file	fio
opstrm	- operate on an input text stream	ifocas
orderphase	- Order time series observations by fractional phases.	timeseries
orfits	- Convert a FITS image into an IRAF image (dataio V2.10.4)	obsolete
orient	- Reorient image to N up and E left or undo re-orientation	xdimsum
orient	- Reorient image to N up and E left or undo re-orientation	xirred
orient	- Reorient image to have N up and E left, or undo re-orientation	dimsum
orphan	- List images whose pixel files have been deleted	nlocal
osb	- Bit and byte primitives	sys
oscir	- Reduction tasks for OSCIR data	gemini
oscirinfo	- General help and information for the OSCIR package	oscir
oscmd	- Send a command to the host operating system	etc
osfn	- Return the host system equivalent of an IRAF filename	language
otr_burst	- spherical harmonic transform then burst files (SRCstream)	suntrans
otrans	- spherical harmonic transform the interpolated images (SRCpiece)	suntrans
ovac2air	- Convert wavelengths from vacuum to air.	stis
overflowx	- Correct an image for 8-bit overflow.	focutility
overlap	- Overlap two images by a certain amount of lines or columns.	sdisplay
overscan	- Simulate the effect of overscanning in an image.	testdata
oview	- Quick view of select frames in OSCIR image	oscir
owfits	- Convert an IRAF image into a FITS image (dataio V2.10.4)	obsolete
p2geo	- Evaluate polynomial fit file and make a GEO image for 'newgeom'.	focgeom
pa	- compute the parallactic angle from the hour angle and declination	slalib
package	- CCD image reduction package	ccdred
package	- CCD image reduction package	quad
package	- CCD image reduction package	xccdred
package	- Define a new package, or print the current package names	language
package	- Discussion and overview of package including sections on:	onedspec
package	- I.4 Tutorial #1 IRAF Structure (irafintro)	index
package	- Package parameters and general description of package	apextract
package	- Package parameters and overview	quadred
packages	- I.3 A Quick View of IRAF (irafintro)	index
pairmass	- Plot airmass vs time for a given coordinate	obsutil
pairmass	- Plot the airmass as a function of zenith distance	nlocal
panic	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
paperprod	- Tasks for generating paper products.	hst_calib
parameter	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
parameters	- Discussion of parameter attributes	language
parg[bcsilrdx]	- Pass an argument to a printf	fmtio
pargstr	- Pass a string type argument to a printf	fmtio
parkey	- Put an IRAF parameter into an image or table header keyword.	ttools
partab	- Transfer an IRAF parameter to a table element.	ttools
parthitv	- Remove particle event.	hsp
parthity	- Find particle hits and compute dark rate.	y_calib
parthitz	- Locate particle events and compute dark rate.	z_calib
paste	- Paste files side-by-side with formatting options	nlocal
pathnames	- Expand a file template into a list of OS pathnames	system
patmatch	- General pattern matching	fmtio
pav	- compute the bearing of a point on a sphere w.r.t. another	slalib
pavg	- Plot the average of the lines of an image or image section	nlocal
pca	- Principal components analysis	mtools
pcalc	- Do arithmetic on a list of apphot/daophot tables databases	ptools
pcalc	- Do arithmetic operations on a list of apphot databases	apphot
pcalc	- Do arithmetic operations on a list of daophot databases	daophot
pcarf	- Generates a ROSAT PSPC ARF for an input PHA file	rosat
pcd	- apply pincushion/barrel distortion to tangent plane coordinates	slalib
pcexpmap	- Creates exposure map for ROSAT PSPC observation	rosat
pcol	- Plot a column of an image	plot
pcols	- Plot the average of a range of image columns	plot
pcombine	- Combine flux calibrated datasets.	spec_polar
pcomputer	- Help page for users of CTIO pc terminals	manuals
pconcat	- Concatenate a list of apphot/daophot databases	ptools
pconcat	- Concatenate a list of daophot databases	daophot
pconvert	- Convert a text database to a tables database	apphot
pconvert	- Convert from an apphot/daophot text to tables database	ptools
pcparpha	- Generates a background PHA spectrum for ROSAT PSPC	rosat
pda2h	- compute the hour angle corresponding to a given azimuth	slalib
pdm	- Find periods in light curves by Phase Dispersion Minimization	astutil
pdq2h	- compute the hour angle corresponding to a given parallactic angle	slalib
pdr	- Preliminary Design Review; software engineering	doc
pdump	- Print selected columns of a list of daophot/apphot databases	ptools
pdump	- Print selected fields from a list of apphot databases	apphot
pdump	- Print selected fields from a list of daophot databases	daophot
peakfind	- Fit peaks in a power spectrum (automatic initial guessing).	grtools
peaks	- Find peaks in x and y data points	xtools
pedsky	- Subtract pedestal and sky from NICMOS images.	nicmos
pedsub	- Subtract pedestal from NICMOS images.	nicmos
perdgrm	- Adds a sine curve and/or pulse-profile to a light curve.	xte
period	- determine the period using epoch folding	xtiming
pertel	- update osculating orbital elements by applying perturbations	slalib
pertue	- update universal elements by applying perturbations	slalib
pexamine	- Interactively examine and edit a daophot database	daophot
pexamine	- Interactively examine and edit an apphot database	apphot
pexamine	- Interactively examine and edit an apphot/daophot database	ptools
ph4mphot	- Do aperture photometry on combined 4m mosaic images	xphotred
pha_center	- Plot histogram of PHA results for all diodes.	z_calib
pha_sig2rms	- Plot histogram of PHA signal-to-noise ratio for all diodes.	z_calib
pha_summary	- Produce report on results of PHA observations.	z_calib
pha_text	- Print text summary of PHA results.	z_calib
phav	- Calibrate discriminator threshold setting.	hsp
phay	- Pulse height analysis.	y_calib
phaz	- Perform a Pulse Height Distribution analysis (PHA).	z_calib
phelp	- Paged HELP: collects and pages the output of HELP	system
phfiltpars	- Edit the catalog file filtering parameters	xphotred
phimfind	- Select catalog images and / or create catalog object lists	xphotred
phimsets	- Group standard star or program images by filter	xphotred
phistogram	- Plot or print the histogram of an image or list	plot
phlist	- List the photometric processing information	xphotred
phlshifts	- Compute the relative shifts of images by group using coordinates	xphotred
phmark	- Mark standard stars on displayed images	xphotred
phobsfile	- Prepare a photometric observations file	xphotred
phonphot	- Do aperture photometry on combined 2m ONIS images	xphotred
phot	- Compute sky values and initial magnitudes for a list of stars	daophot
phot	- Measure magnitudes for a list of stars	apphot
photcal	- Photometric Calibration Package	digiphot
photcheck	- Utility for monitoring photometric stability of a data set	dimsum
photdiff	- Calculate photometric variability using photcheck output data	dimsum
photman	- Photometry Manual	manuals
phphot	- Do general aperture photometry on images	xphotred
phwshifts	- Compute the relative shifts of images by group using wcs info	xphotred
pickfile	- Get the file name picked from the input file template.	imgtools
pimtext	- Put text directly into images using a pixel font.	vtel
pimtext	- Put text directly into images using a pixel font.	vtelold
pipeline	- GONG pipeline processing programs (ea)	grasp
pipeline	- ING instrument full reduction [up]	rgo
pixcoord	- Compute pixel coordinates of stars in an image.	wfpc
pixedit	- Screen editor for image pixels	imgtools
pixfix	- Resurrect a header for an orphaned pixel file	nlocal
pixheader	- Read internal headers from pixel files	nlocal
pixlocate	- Print positions of all points inside (or outside) a	imgtools
pixselect	- List pixel values within a certain range	ctio
pixupdate	- Update the internal pixel headers with the header pathnames	nlocal
pkanalyse	- Analyse PEAKFIND output tables.	grtools
planel	- compute the approximate heliocentric position/velocity of a planet	slalib
planet	- compute the approximate heliocentric position/velocity of a planet	slalib
plante	- compute approximate topocentric apparent position of a planet	slalib
plband	- Plot a set of passbands.	synphot
plbias	- Correct linear polarization for bias in Q and U	spec_polar
plcreate	- create a pixel list from a region	ximages
plm_trim	- generate trimming limits for spherical harmonic transform (SRCstream)	suntrans
plotting	- I.7 Tutorial #4 Implot Task (irafintro)	index
plr2rec	- transforms vector from polar (velocity,modulation) into	velcal
plratio	- Plot the ratio of observed to synthetic spectral or	synphot
plspec	- Plot spectral and photometric data.	synphot
pltrans	- Plot photometric transformation diagrams (e.g., color-color	synphot
pltsol	- Calculate plate solution from table of positions.	gasp
plucy	- Multiple channel photometric image restoration.	contrib
pm	- apply the correction for proper motion to a star	slalib
poffsets	- Find pixel offsets using cross-correlation.	ctools
polbin	- Rebin Stokes and polarization spectra.	spec_polar
polcalc	- Calculate polarization from Stokes IQUV spectra.	spec_polar
poleffv	- Calculate polarization efficiency.	hsp
polmo	- correct site longitude and latitude for polar motion	slalib
polnorm	- Normalize Stokes QUV spectra by Stokes I.	spec_polar
polpav	- Calibrate position angle offset.	hsp
polplot	- Stacked plot of flux and polarization spectra.	spec_polar
polverify	- Verify polarimetry calibrations.	hsp
polyepoch	- Fit polynomials to coefficients as functions of the epoch.	hsp
polyeval	- Evaluate calibration corrections.	hsp
polyfit	- Fit a polynomial to a specified quantity.	hsp
polyfit	- Fit polynomial to list of X,Y data	utilities
polymark	- Create polygon lists for polyphot	apphot
polyphot	- Measure magnitudes inside a list of polygonal regions	apphot
ponpars	- Edit the 2m ONIS aperture photometry parameters	xphotred
populate	- Populate a db with a new component	aspec
posvel	- Calculate position and velocity vector of the spacecraft.	hsp
powercor	- Apply power law correction to mountain reduced spectra	iids
powerpars	- Pset with parameters for powerlaw function.	fitting
powerspec	- Compute the power spectrum of an image.	fourier
pp_dads	- Paper products generation	paperprod
ppars	- Edit the general photometry parameters	xphotred
pprofile	- Plot or print radial profile or encircled energy.	ctools
prcache	- Show process cache, or lock a process into the cache	language
prebn	- compute the FK4 matrix of precession between two epochs	slalib
prec	- compute the FK5 matrix of precession between two epochs	slalib
preces	- precess coordinates in either the FK4 or FK5 systems	slalib
precess	- Precess a list of astronomical coordinates	astutil
precl	- compute the longterm matrix of precession between two epochs	slalib
precor	- Cosmic-ray processing.	dither
precss	- precess coordinates in either the FK4 or FK5 systems	slalib
prekeep	- Save the most recent previewed spectrum	sam
prenumber	- Renumber a list of apphot/daophot databases	ptools
prenumber	- Renumber stars in a daophot database	daophot
prenumber	- Renumber stars in an apphot database	apphot
prenut	- compute the FK5 matrix of precession and nutation	slalib
prepspec	- Prepare a spectrum for subsequent de-fringing procedures.	stis
prering	- Set up first guess ring parameters.	taucal
preview	- Preview spectra with extraction and rough	sam
prf	- information on the Point Response Function (or psf)	xray
prf	- Point Response Function (or psf) information	xspatial
prfit	- Print contents of fit tables created by fitting task.	fitting
print	- Print a line on the standard output	language
printf	- Formatted print to STDOUT	fmtio
printf	- Formatted print to the standard output	language
printing	- VII.I Using the Computers at CTIO (appendix)	index
printlog	- Logfile task (hidden task)	gemtools
problems	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
problems	- Submit an STSDAS software problem report to STScI.	stsdas
proc	- Combine find, sky, profile, whole and extract	sam
process	- A task generated by BATCHRED	iids
process	- A task generated by BATCHRED	irs
profile	- Fit optimal extraction profile	sam
protect	- Protect a file from deletion	fio
protect	- Protect a file from deletion	system
proto	- Prototype or interim tasks	clpackage
prow	- Plot a line (row) of an image	plot
prows	- Plot the average of a range of image lines	plot
pscor	- Correct Power Spectrum for 2pt difference filter.	grtools
pselect	- Select records from an apphot database	apphot
pseudocolor	- Select pseudocolor enhancement	iis
psf	- Compute the point spread function	daophot
psfextr	- Extract a subsection of an image to be put in the PSF library.	w_calib
psfg2d	- Create a MATPHOT PSF file with a 2-d Gaussian PSF.	mxtools
psfmatch	- Match the point-spread functions of 1-D or 2-D images	immatch
psfmeasure	- Measure PSF sizes from stellar images	nmisc
psfobs	- Simulate a CCD stellar observation using a MATPHOT PSF file.	mxtools
psfpars	- Pset for setting psf parameters used in the wiener task.	restore
psfprep	- Convert a PSF image into the MATPHOT PSF format.	mxtools
psfstar	- Add a star to an image using a MATPHOT PSF file.	mxtools
psikern	- IRAF GIO Kernel to produce PostScript output.	stplot
psort	- Sort an apphot database	apphot
pspc_fitting	- for more information on ROSAT/PSPC spectral fitting	xspectral
pspc_hrcolor	- compute an image which reflects the xray color of a PSPC observation	xplot
pstack	- Plot a stack of pixel values from a MultiAccum image.	nicmos
pstats	- Plot a stack of MultiAccum image statistics.	nicmos
pstselect	- Select candidate psf stars based on proximity	daophot
ptox	- Convert a power/phase image to a complex image.	grtools
pttest	- Run basic tests on the ptoolsx package tasks	ptools
put_global	- Set the value of a parameter for all components in the db	aspec
putcal	- Place parameter values from a calibration pset into data files	ctools
putcc	- Put only printable characters to a file	fio
putline	- Put a line to to a text file	fio
putlog	- Put a message to the logfile	language
putsqib	- Merge a squibby brightness image into a full disk image.	vtel
putsqib	- Merge a squibby brightness image into a full disk image.	vtelold
pv2el	- convert J2000 position and velocity to osculating elements	slalib
pv2ue	- convert instantaneous position and velocity to universal element set	slalib
pvector	- Plot an arbitrary vector in a 2D image	plot
pvobs	- compute the geocentric position / velocity of an observing station	slalib
pvol	- Project volume image (generates 'rotating' volume images)	vol
pweight	- Compute weights using phottab, for use with splice.	ctools
pwindow	- Calculate window function power spectrum.	grtools
pxcoord	- List pixel coordinates of guide stars.	gasp
pxy	- apply a linear model to a set of expected and measured [x,y]	slalib
qasun	- GONG image quality assessment tasks (ww)	grasp
qbox	- An older script version of xbox (superceded)	ucsclris
qcgong	- GONG image quality control tasks (da)	grasp
qcplot	- 1 to 4 row and/or column plots of images	qcgong
qdarkcombine	- Combine and process dark count images using quadproc	quadred
qdcmd	- Show WFPC2COLOR results as a color-magnitude diagram	mxtools
qdisplay	- Display the 4 separate mosaic quadrant images	nlocal
qdwfpc2	- QDPHOT analysis of 2 HST WFPC2 images	mxtools
qfastsky	- Derive sky image for QUIRC, median or min/max filtering	quirc
qflat	- Derive flat field and bad pixel mask for QUIRC	quirc
qflatcombine	- Combine and process flat field images using quadproc	quadred
qhdisplay	- Display the 4 separate mosaic quadrant images (harcon)	nlocal
qmosaic	- Quick mosaic of the four WFPC or WFPC2 frames into one image.	wfpc
qp2fits	- convert from PROS QPOE format to BINTABLE FITS format	xdataio
qpaddaux	- add additional BINTABLEs to existing QPOE file	xdataio
qpappend	- append a list of input QPOEs to produce a single QPOE file	xdataio
qpcalc	- Modify/Create event attributes with calculator	xproto
qpcopy	- copy a qpoe file to another qpoe file	ximages
qpcreate	- Convert an ASCII event-list to PROS/QPOE format	xproto
qpgapmap	- calculate the de-gapped HRI coordinates (detx,dety)	xdataio
qphedit	- edit header parameters in a qpoe or image file	ximages
qphot	- Measure quick magnitudes for a list of stars	apphot
qplintran	- apply a linear transformation to a QPOE file (like IMLINTRAN)	ximages
qplist	- list individual photon records in regions and aux. records	ximages
qpoe	- description of the QPOE data file and user interface	xray
qpphase	- Generate a QPOE file, adding a new element attribute - phase	xtiming
qprotate	- apply a rotation angle to a QPOE file	ximages
qpshift	- apply a linear shift to a QPOE file	ximages
qpsim	- event simulation task	xspatial
qsky	- Derive sky image for QUIRC, includes flagging of objects	quirc
qsort	- General quick sort for any data structure	etc
quad	- Demultiplex a raw mosaic into a single tiled output image	nlocal
quad	- quad CCD processing package	ared
quadjoin	- Rejoin single amplifer images produced by quadsplit	quadred
quadred	- CCD reductions for QUAD amplifier data	imred
quadscale	- Scale sections by gain factors	quadred
quadsections	- Produce image section list for sections of quadformat images	quadred
quadsplit	- Split quadformat data into individual single amplifer images	quadred
quality	- Generate HRS diode quality image.	z_calib
queue	- Show a queue's status (printer by default)	nlocal
quickfit	- Fit an ellipse to the solar limb.	vtel
quickfit	- Fit an ellipse to the solar limb.	vtelold
quickhelp	- Quick Introduction to the IRAF system	manuals
quickie	- Quick data reduction [up]	rgo
quirc	- Reduction tasks for Hokupa'a/QUIRC data	gemini
quircinfo	- General help and information for the QUIRC package	quirc
quzcif	- Interrogates Caldb for location of a dataset	caltools
qzerocombine	- Combine and process zero level images using quadproc	quadred
r2df	- Convert a CTIO 2-d frutti image into an IRAF image	mtlocal
r49fits	- A fits reader for obsolete versions of iraf.	tobsolete
radix	- Encode a number in the specified radix	language
radlist	- List an azimuthally averaged radial profile	nlocal
radplt	- PLot the radial profile of an object (noao.proto V2.9)	obsolete
ramps	- make a series of ramp observations	ccdacq
random	- Generate an image of random numbers	model
range	- normalize an angle to the range -pi <= angle <= pi (s.p.)	slalib
ranges	- Expand a range specification into a list	nlocal
ranges	- Parse a list of ranges "1,3,5-7,.."	xtools
ranorm	- normalize an angle to the range 0 <= angle <= 2pi (s.p.)	slalib
rappendx	- Append reseau entries from one file to another.	focgeom
rarc2pros	- convert ROSAT archive files to PROS format(root_ext.fits)	xdataio
rarc2pros_c	- convert ROSAT archive files to PROS format(root_EXT.FITS)	xdataio
rashead	- Show rasterfile header information.	sobsolete
rastoim	- Convert rasterfile to IRAF image.	sobsolete
ratiox	- Divide two or more images prior to relative DE corrections.	focphot
rbinary	- Create an image from a binary file.	imgtools
rbkmap_make	- script to create rotated background map from QPOE file	eintools
rbnpha	- Compresses a PHA dataset	heasarc
rbnrmf	- Physically compresses a RMF file	caltools
rbnrpsf	- Rebins a radial point spread function	caltools
rbs	- Quick-look RBS data reduction	quickie
rc	- Interactively label a plot with text strings.	stplot
rcamera	- Convert a CAMERA image into an IRAF image	mtlocal
rcardimage	- Convert a cardimage file into a text file	dataio
rcc	- compute the difference between TDB and TT in seconds	slalib
rccd	- Convert an IFA CCD image into an IRAF image	nlocal
rccd4th	- Convert a CCD FORTH image into an IRAF image	somtlocal
rcombine	- Average or sum rapid-readout data with propagation of errors.	ctools
rcp	- VII.I Using the Computers at CTIO (appendix)	index
rd2xy	- Translate RA/Dec to the pixel coordinate.	imgtools
rdifferx	- Plot histogram of differences between entries in separate files.	focgeom
rdirectoryx	- Print directory of all entries in a reseau file.	focgeom
rdplan	- compute approximate topocentric apparent position of a planet	slalib
rdprint	- Print difference between two reseau entries.	focgeom
rdssa	- Convert the PDB SVDF.DAT file into an STSDAS table.	ctools
rdumpf	- Convert IPPS rasters from a DUMPF tape to IRAF images	mtlocal
read	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
read	- Read a binary block of data from a file	fio
read5	- Read Grammy type 5 disk files into an IRAF image.	fts
read6	- Read Grammy type 6 disk files into an IRAF image.	fts
reading	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
readvt	- Read a full disk tape and produce an IRAF image.	vtel
readvt	- Read a full disk tape and produce an IRAF image.	vtelold
rearcfts	- Read entire FTS archive tapes.	fts
reblock	- Copy a binary file, optionally reblocking	dataio
rec2plr	- transforms from rectangular coordinates into polar	velcal
redcorr	- Correct line flux for interstellar reddening	nebular
redefine	- Redefine a task	language
redshift	- Tasks for determining redshifts and dispersions.	contrib
reduce	- Driver script for firstpass, interactive shift measurements, maskpass	dimsum
reduce	- Parameter description of main reduction task	dimsum
refco	- compute the refraction coefficients	slalib
refcoq	- compute the refraction coefficients (fast version)	slalib
refdata	- Pset to specify common synphot parameters.	synphot
references	- Find all help database references for a given topic	system
reflresamp	- Resample or reflect an image or vector using	registration
reflux	- Apply new absolute sensitivity corrections to HRS spectra.	hrs
reformat	- change image on heliographic coordinate system between unfolded	suntrans
refro	- compute the atmospheric refraction for optical and radio wavelengths	slalib
refspectra	- Assign reference spectra to object spectra	iids
refspectra	- Assign reference spectra to object spectra	irs
refspectra	- Assign reference spectra to observations	ctioslit
refspectra	- Assign reference spectra to observations	kpnocoude
refspectra	- Assign reference spectra to observations	kpnoslit
refspectra	- Assign wavelength reference spectra to other spectra	argus
refspectra	- Assign wavelength reference spectra to other spectra	echelle
refspectra	- Assign wavelength reference spectra to other spectra	hydra
refspectra	- Assign wavelength reference spectra to other spectra	onedspec
refspectra	- Assign wavelength reference spectra to other spectra	specred
refv	- apply the refraction correction to a Cartesian 3-vector	slalib
refz	- apply the refraction correction to a zenith distance	slalib
regions	- description of PROS region masks	xray
regions	- Produce guide star region files (as STSDAS tables).	gasp
registar	- (intentionally misspelled), combines shiftfix & magshiftfix	dimsum
reidentify	- Automatically identify features in spectra	argus
reidentify	- Automatically identify features in spectra	hydra
reidentify	- Automatically identify features in spectra	iids
reidentify	- Automatically identify features in spectra	irs
reidentify	- Automatically identify features in spectra	onedspec
reidentify	- Automatically reidentify features in spectra	specred
reidentify	- Reidentify arc lines and determine new dispersion functions	ctioslit
reidentify	- Reidentify arc lines and determine new dispersion functions	kpnocoude
reidentify	- Reidentify arc lines and determine new dispersion functions	kpnoslit
reidentify	- Reidentify features	longslit
release_xray	- release notes for this build	xray
relsen	- Calculate relative sensitivity (including instrumental	hsp
remap	- Remap the input image using bicubic interpolation	gongcor
remap	- register disk image onto a latitude-longitude grid (SRCpiece)	suntrans
rename	- Change the name of a file	fio
rename	- Rename a file	system
reopen	- Reopen a file on another file descriptor	fio
resample	- Resample calibrated fluxes to a linear wavelength scale.	ctools
resavg	- Average reseau entries.	focgeom
reset	- Reset the value of an environment variable	language
resfind	- Automatically find reseau marks.	focgeom
resize	- Update the IRAF stty terminal size manually	nlocal
resolution	- resolution classifier	ifocas
respar	- User specified resampling parameters pset.	registration
response	- Determine response calibration	ctioslit
response	- Determine response calibration	kpnocoude
response	- Determine response calibration	kpnoslit
response	- Determine response calibration	longslit
response	- Determine response calibration	specred
restore	- Deconvolve or filter 1- or 2-dimensional images.	analysis
revalfitx	- Evaluate, at certain points, fit produced by 'rfitx'.	focgeom
revisions	- Revisions to installed software	doc
rewind	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
rewind	- Rewind a device (magtape)	system
rextrap	- Extrapolate a reseau grid by one row or column on all sides.	focgeom
rfindx	- Locate reseau marks in an image.	focgeom
rfits	- Convert FITS image data into a list of IRAF images	dataio
rfits	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
rfits	- VII.I Using the Computers at CTIO (appendix)	index
rfits2pros	- convert ROSAT PI data tapes to PROS format(root00n)	xdataio
rfitx	- Calculate fit of distorted coordinates to reference coordinates.	focgeom
rfixx	- Fix holes in reseau file entries.	focgeom
rftsarc	- Read sections of FTS archive tapes.	fts
rgb	- Select true color mode (red, green, and blue frames)	iis
rgbdisplay	- Display an RGB image	color
rgbdither	- Create an 8-bit RGB dithered image	color
rgbsun	- Create a Sun 24-bit RGB rasterfile	color
rgbto8	- Create an 8-bit RGB image with special color map	color
rgenx	- Generate a reseau file or entry.	focgeom
rh_fits2pros	- task to install HRI RDF sample data	xinstall
rheaders	- Register using FITS coordinate parameters.	registration
ridsfile	- Convert IDSFILES from a DUMPF tape to IRAF images	mtlocal
ridsmtn	- Convert mountain format IDS/IRS data to IRAF images	mtlocal
ridsout	- Convert a text file in IDSOUT format to IRAF images	mtlocal
ringavg	- Compute pixel averages in concentric rings about given center	proto
ringpars	- Compute ring parameters for a series of images	fabry
rinterx	- Perform simple interpolation between reseau grids.	focgeom
ripple	- Compute the HRS ripple function coefficients.	z_calib
rlogin	- VII.I Using the Computers at CTIO (appendix)	index
rmap	- Map a full disk image into a 180 by 180 flat image.	vtel
rmap	- Map a full disk image into a 180 by 180 flat image.	vtelold
rmarkerx	- Interactively modify the positions in a reseau table.	focgeom
rmbin	- Find/delete binary files in subdirectories	softools
rmedian	- Ring median filter a list of 1D or 2D images	imfilter
rmfiles	- Find/delete files in subdirectories	softools
rmfringe	- Remove fringe pattern	mscred
rmfringe	- Remove fringe pattern	mscred
rmode	- Ring modal filter a list of 1D or 2D images	imfilter
rosat	- ROSAT mission specific package	ftools
rosat_files	- description of ROSAT data files which can be input	xray
rosprf	- generate images that model ROSAT PRF (PSF)	xspatial
rotate	- Rotate and shift a list of 2-D images	imgeom
rotcor	- Rotation correct a m-nu diagram.	grtools
rotfind	- Finds rotation angle from a set of cross-correlation images.	dither
rp_fits2pros	- task to install PSPC RDF sample data	xinstall
rpds	- Convert a PDS image into an IRAF image	mtlocal
rplotx	- Plot magnified vector differences between reseau grids.	focgeom
rprintx	- Print out reseau mark coordinates.	focgeom
rpsfqdp	- Converts OGIP format radial profile file to ASCII QDP	caltools
rrcopy	- Convert IPPS rasters from an RCOPY tape to IRAF images	mtlocal
rremovex	- Fill in reseau marks with cosmetic data.	focphot
rretmmt	- Convert an MMT Reticon image into an IRAF image	somtlocal
rrotat	- Rotate an image	model
rsdpunix	- Create RSDP format UNI file for FOC.	focutility
rskysub	- Sky subtract images using running mean or median	proto
rsp2rmf	- Converts SF format response matrices to OGIP FITS format	caltools
rspectext	- Convert ascii text spectra to image spectra	onedspec
rstat	- Print statistics about one or two reseau entries.	focgeom
rsubset	- Extract or print a subset of a reseau grid.	focgeom
rtextimage	- Convert text files to IRAF images	dataio
rtodbx	- Put reseau data in a form suitable for geometry tasks in	focgeom
rtransformx	- Perform linear transformations on reseau coordinates.	focgeom
runmean	- make running mean images for detrending, filtering allowed (SRCpiece)	suntrans
rv	- Radial velocity analysis package [up]	noao
rvcorrect	- Compute radial velocity corrections	astutil
rvcorrect	- Compute radial velocity corrections	rv
rverot	- compute the earth rotation velocity component in a given direction	slalib
rvgalc	- compute the dynamical LSR velocity component in a given direction	slalib
rvidlines	- Measure radial velocities from spectral lines	rv
rvlg	- compute the solar velocity component in a given direction	slalib
rvlsrd	- compute the peculiar solar velocity component in a given direction	slalib
rvlsrk	- compute the standard solar velocity component in a given direction	slalib
rvreidlines	- Reidentify spectral lines and measure radial velocities	rv
rvxcor	- Compute radial velocities via cross correlation	ctio
s2tp	- project spherical coordinates onto the tangent plane (s.p.)	slalib
s4mpars	- Edit the 4m MOSAIC sky fitting parameters	xphotred
saexpd	- Reads science array vectors and outputs generic FITS files.	xte
saextrct	- Creates lightcurve and/or spectrum from science array vectors.	xte
sam	- Package for extraction of spectra from 2d frames [up]	rgo
sampcum	- Accumulate a MultiAccum image from a set of sample differences.	nicmos
sampdiff	- Compute first differences of samples in a MultiAccum image.	nicmos
sampinfo	- Print sample information for a MultiAccum image.	nicmos
samplepars	- Pset with data sampling parameters.	fitting
saodump	- Make image and colormap files from SAOimage display	sobsolete
saolpr	- Print an image from an SAOImage display.	playpen
sapertures	- Set or change aperture header information	argus
sapertures	- Set or change aperture header information	echelle
sapertures	- Set or change aperture header information	hydra
sapertures	- Set or change aperture header information	kpnocoude
sapertures	- Set or change aperture header information	onedspec
sapertures	- Set or change aperture header information	specred
sarith	- Spectrum arithmetic	kpnocoude
sarith	- Spectrum arithmetic	kpnoslit
sarith	- Spectrum arithmetic	longslit
sarith	- Spectrum arithmetic	onedspec
satlink	- Help page for use of the Satellite Link to the US	manuals
sbands	- Bandpass spectrophotometry of spectra	onedspec
sc2dref	- Add to the file header all required keywords necessary to	stis
scanc	- Get the next character from a scan	fmtio
scatterv	- Calculate scattered light contribution.	hsp
scc_to_utc	- convert from ROSAT spacecraft clock time to UTC	timcor
schmittbin	- Compute regression coefficients by Schmitt's method.	statistics
sclean	- Sigma-CLEAN deconvolution of 2-d images.	restore
scombine	- Combine spectra	ctioslit
scombine	- Combine spectra	echelle
scombine	- Combine spectra	kpnocoude
scombine	- Combine spectra	kpnoslit
scombine	- Combine spectra	specred
scombine	- Combine spectra having different wavelength ranges	argus
scombine	- Combine spectra having different wavelength ranges	hydra
scombine	- Combine spectra having different wavelength ranges	iids
scombine	- Combine spectra having different wavelength ranges	irs
scombine	- Combine spectra having different wavelength ranges	onedspec
scoords	- Set spectral coordinates as a pixel array (1D spectra only)	onedspec
scopy	- Copy spectra including aperture selection and format changes	ctioslit
scopy	- Copy spectra including aperture selection and format changes	kpnocoude
scopy	- Copy spectra including aperture selection and format changes	kpnoslit
scopy	- Select and copy apertures in different spectral formats	argus
scopy	- Select and copy apertures in different spectral formats	echelle
scopy	- Select and copy apertures in different spectral formats	hydra
scopy	- Select and copy apertures in different spectral formats	iids
scopy	- Select and copy apertures in different spectral formats	irs
scopy	- Select and copy apertures in different spectral formats	onedspec
scopy	- Select and copy apertures in different spectral formats	specred
scopy	- Sum and extract spectra from long slit to 1D format	longslit
scp	- Simple CCD processing package [up]	rgo
sdqflags	- Print sum of data quality flags.	stis
sdtst	- calculates the standard deviation of an image using a template	velcal
seam	- Smooth the boundaries between mosaicked WF/PC frames.	wfpc
sec2time	- Convert time offset to absolute time	time
sections	- Expand an image template on the standard output	imutil
seek	- Set the file offset of the next char to be read or written	fio
seepsf	- Compute an image from the point spread function	daophot
seexpd	- Reads science events data and outputs generic FITS files.	xte
seextrct	- Creates lightcurve and/or spectrum from science events data.	xte
select	- select objects by identifier from a catalog	ifocas
select_list	- make list from window	qasun
selftest	- Self test program to check DTOI transformation	dtoi
sensfunc	- Compute instrumental sensitivity from standard stars	specred
sensfunc	- Create sensitivity function	ctioslit
sensfunc	- Create sensitivity function	echelle
sensfunc	- Create sensitivity function	iids
sensfunc	- Create sensitivity function	irs
sensfunc	- Create sensitivity function	kpnocoude
sensfunc	- Create sensitivity function	kpnoslit
sensfunc	- Create sensitivity function	longslit
sensfunc	- Create sensitivity function	onedspec
sep	- compute the angle between two points on a sphere (s.p.)	slalib
service	- Service a query from a background job	language
set	- Set an environment variable	language
setairmass	- Compute effective airmass and middle UT for an exposure	argus
setairmass	- Compute effective airmass and middle UT for an exposure	astutil
setairmass	- Compute effective airmass and middle UT for an exposure	ctioslit
setairmass	- Compute effective airmass and middle UT for an exposure	echelle
setairmass	- Compute effective airmass and middle UT for an exposure	hydra
setairmass	- Compute effective airmass and middle UT for an exposure	iids
setairmass	- Compute effective airmass and middle UT for an exposure	irs
setairmass	- Compute effective airmass and middle UT for an exposure	kpnocoude
setairmass	- Compute effective airmass and middle UT for an exposure	kpnoslit
setairmass	- Compute effective airmass and middle UT for an exposure	longslit
setairmass	- Compute effective airmass and middle UT for an exposure	onedspec
setairmass	- Compute effective airmass and middle UT for an exposure	specred
setcat	- create or modify catalog interactively	ifocas
setinstrument	- Set instrument parameters	ccdred
setinstrument	- Set instrument parameters	mscred
setinstrument	- Set instrument parameters	mscred
setinstrument	- Set instrument parameters	multampccd
setinstrument	- Set instrument parameters	multampccd
setinstrument	- Set instrument parameters	quad
setinstrument	- Set instrument parameters	quadred
setinstrument	- Set instrument parameters	xccdred
setjd	- Compute and set Julian dates in images	argus
setjd	- Compute and set Julian dates in images	astutil
setjd	- Compute and set Julian dates in images	ctioslit
setjd	- Compute and set Julian dates in images	echelle
setjd	- Compute and set Julian dates in images	hydra
setjd	- Compute and set Julian dates in images	iids
setjd	- Compute and set Julian dates in images	irs
setjd	- Compute and set Julian dates in images	kpnocoude
setjd	- Compute and set Julian dates in images	kpnoslit
setjd	- Compute and set Julian dates in images	longslit
setjd	- Compute and set Julian dates in images	onedspec
setjd	- Compute and set Julian dates in images	specred
setmwcs	- Edit the MWCS of an image (for data not produced by GONG).	grtools
setpsf	- set the PSF description in a catalog from a text file	ifocas
setsize	- Determine the size of a TS or PS dataset.	grtools
setup	- Setup the SPEC1 package for a particular instrument	spec1
setup	- Setup the SPEC2 package for a particular instrument	spec2
sf2pha	- Converts SF format PHA file to OGIP FITS format	heasarc
sfit	- Fit spectra and output fit, ratio, or difference	onedspec
sfit	- Fit spectra and output fit, ratio, or difference	specred
sflatcombine	- Combine and process mosaic sky flat field exposures	mscred
sflatcombine	- Combine and process mosaic sky flat field exposures	mscred
sflatcombine	- Combine and process mosaic sky flat field exposures	multampccd
sflatcombine	- Combine and process mosaic sky flat field exposures	multampccd
sflip	- Flip data and/or dispersion coordinates in spectra	argus
sflip	- Flip data and/or dispersion coordinates in spectra	ctioslit
sflip	- Flip data and/or dispersion coordinates in spectra	echelle
sflip	- Flip data and/or dispersion coordinates in spectra	hydra
sflip	- Flip data and/or dispersion coordinates in spectra	iids
sflip	- Flip data and/or dispersion coordinates in spectra	irs
sflip	- Flip data and/or dispersion coordinates in spectra	kpnocoude
sflip	- Flip data and/or dispersion coordinates in spectra	kpnoslit
sflip	- Flip data and/or dispersion coordinates in spectra	longslit
sflip	- Flip data and/or dispersion coordinates in spectra	specred
sflip	- Flip data ano/or dispersion coordinates in spectra	onedspec
sflux	- Combine flux data and fit a continuum, to use with fweight.	ctools
sgidecode	- Decode an SGI format metacode file	plot
sgikern	- Simple graphics interface (SGI) graphics kernel	plot
sgraph	- Graph one or more image sections or lists.	stplot
sgraph	- Graph one or more image sections or lists.	tbplot
sgscind	- Search the guide star catalog index.	gasp
sharp	- Measure the sharpness of star images of WFPC1/2	w_calib
shift	- Shift an image by a specified number of pixels.	fourier
shiftfind	- Finds X,Y shifts in a cross-corelation image.	dither
shiftfix	- Basic image mosaicing routine; no sub-pixel replication	dimsum
shiftlines	- Shift the lines of a list of N-D images	imgeom
shiftlist	- Make a rough list of shifts by pointing at images	nlocal
shiftset	- Combine two DIMSUM-produced mosaics with proper exposure weighting	dimsum
show	- Show an environment variable	language
show_models	- Display the current model parameters.	xspectral
showcap	- Show and decode graphcap entries	plot
showfiles	- Print a list of filenames used in a synphot expression	synphot
showme	- Show locations of sky bands and spectra on 2d image	sam
showspiral	- Build and display spiral-search map.	hrs
shutcor	- Shutter correction from images of varying exposure times	obsutil
siaper	- Plot the science instrument apertures of HST.	stplot
side1_offset	- Task to convert side 1 carrousel positions to side 2 positions.	z_calib
sigmanorm	- Renormalize mosaic image to uniform pixel-to-pixel rms	xdimsum
sigmanorm	- Renormalize mosaic image to uniform pixel-to-pixel rms	xirred
sigmanorm	- Utility for renormalizing mosaic to uniform pixel-to-pixel rms	dimsum
simbackgd	- Two-dimensional HST background simulator	simulators
simimg	- Two-dimensional HST imaging instrument simulator	simulators
simnoise	- Two-dimensional HST noise simulator	simulators
simspec	- Two-dimensional HST spectral instrument simulator	simulators
singlefit	- Compare fixed-parameter model with data.	xspectral
sinterp	- Interpolate a table of x,y pairs to create a spectrum	iids
sinterp	- Interpolate a table of x,y pairs to create a spectrum	irs
sinterp	- Interpolate a table of x,y pairs to create a spectrum	onedspec
sisclean	- Plot frequency histogram of an SIS image file and apply an	asca
sishist	- Frequency histogram of an image created from an SIS event file	asca
sispi	- Fills PI column of ASCA SIS event files.	asca
sisrmg	- Generate SIS instrument response matrix	asca
skclose	- Close the sky coordinate descriptor	skywcs
skcopy	- Copy a sky coordinate descriptor	skywcs
skdecim	- Open a sky coordinate descriptor using an image descriptor	skywcs
skdecwcs	- Open a sky coordinate descriptor usning an image or system name	skywcs
skdecwstr	- Open a sky coordinate descriptor using a system name	skywcs
skenwcs	- Encode a system name using a sky coordinate descriptor	skywcs
skequatorial	- Apply pm and transform between equatorial coordinate systems	skywcs
skiiprint	- Print a sky coordinate descriptor summary	skywcs
skiiwrite	- Write a sky coordinate descriptor summary	skywcs
skip	- select fields in a text stream skipping some fields	ifocas
sklltran	- Apply pm and transform between coordinates systems	skywcs
sksaveim	- Update image header using sky coordinate descriptor	skywcs
skset[ids]	- Set a sky coordinate descriptor parameter value	skywcs
skstat[ids]	- Get a sky coordinate descriptor parameter value	skywcs
skultran	- Transform between coordinate systems	skywcs
sky	- Sky processing by "crrej-like" algorithm.	dither
sky	- evaluate the sky for objects in a catalog	ifocas
sky2xy	- Transform from sky to pixel coordinates using WCS keywords	heasarc
skyctran	- Transform coordinates from one celestial wcs to another	imcoords
skymap	- Compute geometric transforms using the image celestial wcs	immatch
skypix	- precess and convert between astronimical coordinate systems	xspatial
skytweak	- Sky subtract 1D spectra after tweaking sky spectra	onedspec
skytweak	- Sky subtract 1D spectra after tweaking sky spectra	specred
skywcs	- Celestial coordinates transformation package	xtools
skyxymatch	- Generate matched pixel lists using the image celestial wcs	immatch
slalib	- Starlink positional astronomy library	math
sleep	- Hibernate for a specified time	language
slist	- List spectrum header parameters	onedspec
slist	- List spectrum headers	kpnocoude
slist	- List spectrum headers	kpnoslit
slist1d	- List spectral header elements	iids
slist1d	- List spectral header elements	irs
slitanglex	- Measure the angle of long slit spectrum to AXIS1.	focgeom
slitless	- Extract a spectrum from a direct/GRISM image pair	contrib
slitpic	- Generate IRAF image of aperture slit mask	nproto
slot_fix	- put time series slot no's, UT time & date into image headers (SRCstream)	suntrans
smap	- Compute the photocathode mapping function (i.e., the	z_calib
smaperloc	- Calibrate location of a small aperture (location phase III).	hsp
smat	- solve a set of simultaneous equations (s.p.)	slalib
snrmap	- determine the signal-to-noise of a given image	detect
sol_ephem	- compute p, camera and derotation angles for image headers (SRCstream)	suntrans
solrot	- Apply solar rotation and red shift velocity corrections	gongcor
sonpars	- Edit the 2m ONIS sky fitting parameters	xphotred
soproto	- Prototype (temporary, contributed) tasks	steward
spars	- Edit the general sky fitting parameters	xphotred
spcombine	- Intercative combine task	ctio
spearman	- Compute the generalized Spearman's rho correlation.	statistics
spec_polar	- Tasks for reducing and analyzing FOS polarimetry observations.	fos
specalign	- Combine spectra such as FP-SPLIT Observations.	ctools
specfit	- Fitting spectra with non-linear chi-square minimization	spfitpkg
specflat	- Create a mean residual flat field for spectra.	scp
specfocus	- Determine spectral focus and alignment variations	nlocal
specfocus	- Determine spectral focus and alignment variations	nmisc
specfocus	- Determine spectral focus and alignment variations	obsutil
specpars	- Spectrograph instrument parameters for sptime	obsutil
specpars	- spectrograph instrument parameters	spectime
specplot	- Scale, stack, and plot multiple spectra	specred
specplot	- Stack and plot multiple spectra	argus
specplot	- Stack and plot multiple spectra	ctioslit
specplot	- Stack and plot multiple spectra	echelle
specplot	- Stack and plot multiple spectra	hydra
specplot	- Stack and plot multiple spectra	iids
specplot	- Stack and plot multiple spectra	irs
specplot	- Stack and plot multiple spectra	kpnocoude
specplot	- Stack and plot multiple spectra	kpnoslit
specplot	- Stack and plot multiple spectra	longslit
specplot	- Stack and plot multiple spectra	onedspec
specred	- Generic slit and fiber spectral reduction package	imred
specshift	- Shift spectral dispersion coordinate systems	argus
specshift	- Shift spectral dispersion coordinate systems	ctioslit
specshift	- Shift spectral dispersion coordinate systems	echelle
specshift	- Shift spectral dispersion coordinate systems	hydra
specshift	- Shift spectral dispersion coordinate systems	iids
specshift	- Shift spectral dispersion coordinate systems	irs
specshift	- Shift spectral dispersion coordinate systems	kpnocoude
specshift	- Shift spectral dispersion coordinate systems	kpnoslit
specshift	- Shift spectral dispersion coordinate systems	longslit
specshift	- Shift spectral dispersion coordinate systems	onedspec
specshift	- Shift spectral dispersion coordinate systems	specred
spectool	- Spectrum display and analysis tool	spt
spectra	- Select and extract spectra from ADC CD-ROM catalogs	adccdrom
specwcs	- Discussion and description of the spectral image formats	onedspec
spfitpkg	- Tasks for fitting spectra with non-linear chi-square	contrib
sphinv	- Spherical harmonic inverse transform	model
sphlos	- Convert from spherical to line of sight coordinates	model
sphspc	- Generate a random spherical harmonic spectrum	model
spiopars	- Pset for specifying columnor file names of input spectrum fields	aspec
splist	- List a 1D spectrum to an intensity vs. wavelength textfile	nlocal
split	- Split a large file into smaller segments	utilities
splits	- split merged catalog objects in an image	ifocas
splot	- Plot and analyze spectra	ctioslit
splot	- Plot and analyze spectra	kpnocoude
splot	- Plot and analyze spectra	kpnoslit
splot	- Preliminary spectral plot/analysis	argus
splot	- Preliminary spectral plot/analysis	echelle
splot	- Preliminary spectral plot/analysis	hydra
splot	- Preliminary spectral plot/analysis	iids
splot	- Preliminary spectral plot/analysis	irs
splot	- Preliminary spectral plot/analysis	longslit
splot	- Preliminary spectral plot/analysis	onedspec
splot	- Preliminary spectral plot/analysis	specred
spotlist	- Generate a list of calibration spot values	dtoi
spp	- SPP reference manual	doc
sprintf	- Formatted print to a string buffer	fmtio
spterrors	- Error calculation parameters	spt
spticfit	- Curve fitting parameters	spt
sptlabels	- Labeling parameters	spt
sptlines	- Line parameters	spt
sptmodel	- Line profile fitting parameters	spt
sptsigclip	- Sigma clipping parameters	spt
sptstack	- Stacking parameters	spt
sqaplot	- ASCA SIS quick analysis ftool ***	asca
src2pha	- Creates a PHA file from specified extensions in an RDF src file	rosat
src_cnts	- calculate number of counts due to sources in QPOE file	eintools
srcinten	- compute the count rate of a given source region	xspatial
sregister	- Register 1-D or 2-D images using the image celestial wcs	immatch
sscan	- Scan a string buffer	fmtio
st2rpsf	- Reads STWFITS file and writes an OGIP RPSF file	caltools
stack	- Stack images to form a new image with one more dimension.	imgtools
standard	- Identify standard stars to be used in sensitivity calc	ctioslit
standard	- Identify standard stars to be used in sensitivity calc	echelle
standard	- Identify standard stars to be used in sensitivity calc	iids
standard	- Identify standard stars to be used in sensitivity calc	irs
standard	- Identify standard stars to be used in sensitivity calc	kpnocoude
standard	- Identify standard stars to be used in sensitivity calc	kpnoslit
standard	- Identify standard stars to be used in sensitivity calc	longslit
standard	- Identify standard stars to be used in sensitivity calc	onedspec
standard	- Tabuluate standard star counts and fluxes	specred
standards	- IRAF programming standards	doc
starfind	- Automatically detect stellar objects in a list of images	imcoords
starfocus	- Determine direct focus variations from stellar images	nmisc
starfocus	- Determine direct focus variations from stellar images	obsutil
starlist	- Make an artificial star list	artdata
statistics	- Statistical analysis software.	analysis
statspec	- Compute statistical error from object and sky spectra	ctio
statstrm	- compute statistics from an input text stream	ifocas
stcal	- Stores one or more calibration files in the Caldb	caltools
stdgraph	- Plot metacode on the standard graphics device	plot
stdphot	- Create a generic standard star observations file	xphotred
stdplot	- Plot metacode on the standard plotter device	plot
stdsets	- Group generic standard star images by filter	xphotred
step	- Take an image and divide the data between different groups.	sobsolete
stepdisp	- tv images of a list of 3-plane images	qcgong
stfhistory	- Add history records to an STSDAS image header.	headers
stfov	- Plot HST science instrument apertures over an image.	stplot
stgindx	- Copy the catalog index to an STSDAS table.	gasp
stis	- Tasks for calibrating STIS data.	hst_calib
stphot	- Photometry Manual for PHOTRED (in progress)	manuals
stplot	- General plotting utilities.	graphics
strcat	- String concatentation	fmtio
strcpy	- String copy	fmtio
strdic	- Look a string up in a dictionary	fmtio
streakflat	- Generate WF/PC flat field from streak exposures of the Earth.	w_calib
strentab	- Simplified entab	xtools
streq	- Compare strings for equality	fmtio
strfits	- Convert FITS files to tables or to GEIS files	fitsio
strge	- Is string A greater than or equal to string B	fmtio
strgt	- Is string A greater than string B	fmtio
stridx	- First occurrence of a character in a string	fmtio
strings	- String manipulation routines	language
strldx	- Last occurrence of a character in a string	fmtio
strle	- Is string A less than or equal to string B	fmtio
strlen	- Length of a string	fmtio
strlt	- Is string A less than string B	fmtio
strlwr	- Convert string to lower case	fmtio
strmatch	- Search a string for a pattern	fmtio
strncmp	- Compare the first N characters of two strings	fmtio
strne	- Is string A not equal to string B	fmtio
stropen	- Open a character string as a file	fio
strsearch	- Fast string search, no metacharacters	fmtio
strt	- Straighten a curved spectrum	sam
strtbl	- Print a list of strings in a table	fmtio
structure	- I.4 Tutorial #1 IRAF Structure (irafintro)	index
strupr	- Convert a string to upper case	fmtio
stty	- Set/show terminal characteristics	language
stw2pha	- Converts stw PHA file to OGIP FITS format	caltools
stwfits	- Convert tables and/or GEIS files to FITS files	fitsio
subet	- remove the E-terms from a pre IAU 1976 catalog position	slalib
subsets	- Description of CCD subsets	ccdred
subsets	- Description of CCD subsets	quad
subsets	- Description of CCD subsets	quadred
subsets	- Description of CCD subsets	xccdred
subsets	- Substract pairs in strings of spectra	iids
subsets	- Substract pairs in strings of spectra	irs
subsky	- Subtract background flux from target+background flux.	timeseries
substar	- Subtract the fitted stars from the original image	daophot
sums	- Generate sums of object and sky spectra by aperture	iids
sums	- Generate sums of object and sky spectra by aperture	irs
sun2vax	- Convert GEIS images from Sun to Vax binary format	convfile
sunmail	- Help page for the UNIX/SUN mailer	manuals
sunpipe	- template script for automated processing	suntrans
sunsetup	- Setup a remote node to use a local sun for image display	nlocal
suntoiraf	- Convert Sun rasters into IRAF images	proto
suntrans	- Spherical Harmonic Transform tasks (ww)	grasp
supgal	- convert deVaucouleurs supergalactic to IAU 1958 galactic coordinates	slalib
surface	- Make a surface plot of an image	plot
surfit	- Fit a surface, z=f(x,y), to a set of x, y, z points	utilities
surfit	- IRAF image surface fitting package	math
surfphot	- Galaxy isophotal analysis package	noao
surfview	- Make a 3-D vector list of an image for use with viewwld	nlocal
survival	- Provide background & overview of survival analysis.	statistics
svd	- compute the SVD factorization of a matrix	slalib
svdcov	- compute the covariance matrix from the SVD factorization	slalib
svdsol	- solve a set of simultaneous equations using SVD factorization	slalib
syndico	- Make dicomed print of daily grams 18 cm across.	vtel
syndico	- Make dicomed print of daily grams 18 cm across.	vtelold
synftach	- Generate synthetic response of Fourier Tach	model
synphot	- Tasks for synthetic photometry and modelling instrument response.	hst_calib
sys_mtime	- Mark the time (for timing programs)	etc
sys_ptime	- Print the elapsed time since last mark	etc
syserr	- Post a system error and take an error action	etc
system	- VII.I Using the Computers at CTIO (appendix)	index
tabfilter	- Generate time filters based on engineering values	xproto
tabim	- Copy a table column to an image.	ttools
tabkey	- Copy a table element to an image or table header keyword.	ttools
table	- Format a list of words into a table	lists
tabpar	- Transfer a table element to an IRAF parameter.	ttools
tabplot	- Graph one or more table files	xplot
tacarrousel	- Perform target acquisition carrousel calibration.	z_calib
tacount	- Calculate observed count rate for target acquisition.	hrs
tadiodepos	- Find a target acquistion image on the main diode array.	z_calib
taextract	- Copy an array entry to a column of scalars in another table.	ttools
taflat	- Calculate target acquisition aperture flat field.	hsp
tail	- Print the last few lines of a file	system
tainsert	- Copy a column of scalars to an array entry in another table.	ttools
tamode	- Analyze a target acquisition field map.	z_calib
tape	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
taperedge	- Apply a cosine bell or linear taper to image edges.	fourier
tarestore	- Restore mode I target acquisition images.	sobsolete
targets	- Find target coordinates based on guide stars.	gasp
task	- Define a new task	language
tasks	- I.3 A Quick View of IRAF (irafintro)	index
tastis	- Analyze STIS target acquisition images.	stis
taucal	- TAURUS Fabry-Perot phase calibration package [down]	rgo
tbcalc	- Do arithmetic on a list of apphot/daophot tables databases	ptools
tbconcat	- Concatenate a list of apphot/daophot tables databases	ptools
tbdump	- Print selected columns of a list of tables databases	ptools
tbrenumber	- Renumber a list of apphot/daophot tables databases	ptools
tcalc	- Perform arithmetic operations on table columns.	ttools
tchcol	- Change column name, print format, or units.	ttools
tcheck	- Check STSDAS table element values.	ttools
tchsize	- Change allocated sizes of various sections of a table.	ttools
tchtype	- Change table type (e.g. from column to row ordered).	sobsolete
tconvert	- Convert table format between Vax and Sun binary format	convfile
tcopy	- Tape to tape copy routine.	vtel
tcopy	- Tape to tape copy routine.	vtelold
tcreate	- Create a STSDAS table from an ASCII descriptor table.	ttools
tdiffer	- Form a table which is the difference of two tables.	ttools
tdump	- Dump the contents of a table to an ASCII file.	ttools
tee	- Tee the standard output into a file	system
telluric	- Remove telluric features from 1D spectra	onedspec
telnet	- VII.I Using the Computers at CTIO (appendix)	index
temden	- Determine electron temperature or density from diagnostic ratio	nebular
templates	- I.3 A Quick View of IRAF (irafintro)	index
templates	- I.6 Tutorial #3 Handling Images (irafintro)	index
testfunc	- Generate analytic form test data (ASCII).	sobsolete
testimx	- Generate FOC test data images with RSDP-like headers.	focutility
tests	- make a series of test observations	ccdacq
tevalfit	- Evaluate a surface fit on positions in an ASCII file.	focgeom
tex	- VII.I Using the Computers at CTIO (appendix)	index
texpand	- Expand tables according to a set of rules.	ttools
text2mask	- Convert text description to pixel mask	nmisc
text2mask	- Convert text description to pixel mask	proto
tgausspars	- Pset with parameters for two-dim Gaussian function.	fitting
thedit	- Edit or print table header keywords.	ttools
thistogram	- Make a histogram of a column in a table.	ttools
thselect	- Select tables satisfying an expression; print keywords.	ttools
tiimage	- Insert images into rows of a 3-D table.	ttools
timcor	- calculate ROSAT timing corrections ( SC/UT/BARYCENTER)	xtiming
time	- Print the current time	language
time	- Timing specific package	ftools
time2sec	- Convert absolute time to a time offset	time
timeconv	- Convert from satellite to barycentric (use with caution on SUN)	asca
timeser_file	- description of time series files (help file only-no task)	suntrans
timplot	- strip plot of table format data	xtiming
timprint	- display timing table data	xtiming
timsort	- create a time-sorted qpoe file for timing analysis	xtiming
tinfo	- Display table size information.	ttools
tintegrate	- Numerically integrate one column with respect to another.	ttools
titable	- Insert 2-D tables into rows of a 3-D table.	ttools
tjoin	- Perform a relational join of two tables.	ttools
tlcol	- List column information for a table.	ttools
tlinear	- Use linear regression to fit one or two table columns.	ttools
tmask	- Do fit to peak positions to find frame distortion.	taucal
tmatch	- Find closest match between rows in two tables	ttools
tmerge	- Either merge or append tables.	ttools
tokens	- Break a file up into a stream of tokens	lists
tomultispec	- Create an OIF MULTISPEC file for data from FITS BINTABLEs.	ctools
topolar	- Convert real & imaginary parts to amplitude & phase.	fourier
totmag	- evaluate the "total" magnitudes for split objects	ifocas
tp2s	- convert tangent plane to spherical coordinates (s.p.)	slalib
tp2v	- convert tangent plane coordinates to direction cosines (s.p.)	slalib
tprecess	- Precess images, tables, or lists of coordinates.	tools
tprint	- Print tables--both headers and data.	ttools
tproduct	- Form the Cartesian product of two tables.	ttools
tproject	- Create new table from selected columns in a table.	ttools
tps2c	- compute the spherical coordinates of the tangent point (s.p.)	slalib
tpv2c	- compute the direction cosines of the tangent point (s.p.)	slalib
tquery	- Create a new table from selected rows and columns in a table.	ttools
trace	- Map out the distortion of a curved spectum	sam
transform	- Transform longslit images to user coordinates	longslit
translit	- Replace or delete specified characters in a file	utilities
transm	- Calculate the transmission of fibres in a frame	wyffos
trebin	- Resample a table to uniform spacing.	ttools
trename	- Rename table files	tobsolete
trendr	- Fit and remove a 2nd order polynomial from the solar disk	gongcor
trendt	- Fit a 2nd order polynomial to the solar disk	gongcor
ts_make	- time transpose the mode coefficients from small l files (SRCstream)	suntrans
ts_mean	- make the means of the registered images into an alternate l=0	suntrans
ts_merge	- merge time series from several sites into one time stream	merge
ts_stat	- histogram, mean and standard dev. of time series mode coefs	qasun
tsclean	- Clean time series of deviant pixels.	grtools
tscopy	- Copy row/column subsets of tables using selectors.	ttools
tselect	- Create a new table from selected rows of a table.	ttools
tsextract	- Extract a portion of a time series.	grtools
tsleep	- Delay process execution	etc
tstat	- Get mean, standard deviation, min, and max for a column.	ttools
ttranspose	- Transpose or flip a table.	ttools
tty	- Device independent terminal control	sys
tunits	- Convert table column from one set of units to another	ttools
tvimcontour	- Load an image & overlay a contour map into the display window	xplot
tvlabel	- Display an image with WCS cursor readback in hh:mm:ss, dd:mm:ss	xplot
tvmark	- Mark objects on the image display	tv
tvproj	- Display an image with x and y projections	xplot
twobbpars	- Pset with parameters for two-black-body function.	fitting
twodpolyfit	- Two dimensional polynomial fit of temperature and epoch.	hsp
twodspec	- Two dimensional spectral red & analysis package [up]	noao
twosampt	- Determine if two sets of data are from the same population.	statistics
txcalc	- Do arithmetic on a list of apphot/daophot text databases	ptools
txconcat	- Concatenate a list of apphot/daophot text databases	ptools
txdump	- Print selected columns of a list of apphot/daophot text databases	ptools
txdump	- Select fields from the center task output text file	irred
txrenumber	- Renumber a list of apphot/daophot text databases	ptools
txtbin	- Convert an IRAF text file to a binary file	dataio
type	- Type a text file on the standard output	system
ucase	- Convert a file to upper case	utilities
uchcoord	- Update plate scale, shift, and rotation of WFPC2 images.	wfpc
uchscale	- Update plate scales of WFPC2 (and WFPC) images.	wfpc
ucor	- transforms three- or six-phase intensity images into	velcal
udcif	- Adds a calibration file to a CIF	caltools
ue2el	- convert universal elements into heliocentric osculating elements	slalib
ue2pv	- compute heliocentric position and velocity from universal form	slalib
ues	- Quick-look UES data reduction	quickie
uniqfile	- Give a file a unique name prior to archiving.	tools
uniqid	- Create a unique character string identifier.	tools
uniqname	- Create a unique file name for archiving.	tools
uniqtab	- Give all the files in an STSDAS table unique names.	tools
unique	- Delete redundant elements from a list	lists
unlearn	- I.3 A Quick View of IRAF (irafintro)	index
unlearn	- Restore the default parameters for a task or package	language
unload	- I.3 A Quick View of IRAF (irafintro)	index
unpcd	- remove pincushion/barrel distortion from distorted coordinates	slalib
unprotect	- Remove delete protection from a file	system
unsplit	- remove split objects and reset object flags in a catalog	ifocas
unstep	- Consolidate several groups in an image into one group.	sobsolete
unwrap	- Remove effects of data wraparound on continuum scans.	vtel
unwrap	- Remove effects of data wraparound on continuum scans.	vtelold
unwrap	- Remove the 'wrap' from data that has exceeded the internal	fos
update	- Update a task's parameters (flush to disk)	language
upimgrdf	- convert a list of IRAF image files to RDF compatible format	xdataio
upqpoerdf	- convert a list of QPOE files to RDF compatible format	xdataio
upreffile	- Update calibration reference files names in image headers	headers
urand	- Uniform random number generator	etc
urand	- Uniform random number generator	utilities
userpars	- Pset with parameters for user-defined function.	fitting
using_detect	- describes the tasks available in the detect package	detect
using_spectral	- for more information about the spectral package	xspectral
using_timcor	- description of ROSAT timing correction tasks	timcor
using_xplot	- guide to plotting tasks available to display Xray data	xplot
utc	- ROSAT spacecraft clock to universal time data point description	timcor
utilities	- Miscellaneous utilities package	clpackage
utntrp	- Expand UT time.	ephem
v2tp	- convert direction cosines to tangent plane coordinates (s.p.)	slalib
vac2air	- Convert wavelength scales from vacuum to air.	ctools
vartst	- non-parametric statistical tests for source variability	xtiming
vax2sun	- Convert GEIS images from Vax to Sun binary format	convfile
vcor	- transforms three-phase intensity images into phase velocity,	velcal
vdv	- convert the scale production of two 3-vectors (s.p.)	slalib
vecfea	- Register using common features of vector data.	registration
vel_qual	- velocity quality assurance parameter calculation	qasun
velcal	- GONG Instrument Calibration tasks (rt)	grasp
velfit	- Determine correction from ephemeris to calibrated velocities	ephem
velocity	- Generate velocity maps from a cube	fabry
velvect	- Plot representation of a velocity field	plot
vfit	- Determine correction from ephemeris to calibrated velocities	ephem
vi	- VII.I Using the Computers at CTIO (appendix)	index
vigcompute	- Compute the HRS vignetting function.	z_calib
vigdata	- apply vignetting correction to image data	xspatial
vigfit	- Smooth HRS vignetting function.	z_calib
vigmodel	- apply vignetting effect to an image model	xspatial
vla	- Spectral image reduction for VLA data.	contrib
vlascor	- calibrates oscillation phase velocity with laser phase	velcal
vmi	- transforms three-phase intensity images into phase velocity,	velcal
vmi2pmi	- converts velocity, modulation, intensity into	velcal
vn	- normalize a 3-vector and compute the modulus (s.p.)	slalib
vtblink	- Blink daily grams on the IIS to check for registration.	vtel
vtblink	- Blink daily grams on the IIS to check for registration.	vtelold
vtel	- NSO Solar vacuum telescope image reductions	imred
vtel	- Vacuum telescope reductions	nso
vtelold	- Vacuum telescope reductions for old magnetograph	nso
vtexamine	- Examine a vacuum telescope tape, print headers and profile.	vtel
vtexamine	- Examine a vacuum telescope tape, print headers and profile.	vtelold
vuespec	- Interactive task for fitting model components to spectra	aspec
wait	- Wait for all background jobs to complete	language
warmpix	- Flag an/or correct hot pixels in WFPC2 images.	wfpc
warmup	- Calculate dark signal as a function of warmup time.	hsp
wavecal	- Update science header with MSM offset value from wavecal.	stis
waveoff	- Determine offset between calibrated wavelength and WAVE spectra.	hrs
waveoffset	- Compute wavelength offset between two spectra.	fos
wcardimage	- Convert text files to cardimage files	dataio
wconvolve	- Convolve power spectrum with window function.	grtools
wcsbug	- Logical/physical coordinate conversion incorrect	xray
wcscoords	- use WCS to convert between IRAF coordinate systems (logical,physical)	xspatial
wcscopy	- Copy the wcs from one image to another	immatch
wcsctran	- Transform coordinates from one iraf image wcs to another	imcoords
wcsedit	- Edit an image wcs parameter	imcoords
wcsfix	- Fix a non-standard WCS	xastcat
wcslab	- Overlay a displayed image with a world coordinate grid	tv
wcsmap	- Compute geometric transforms using the image wcs	immatch
wcsqpedit	- Modify the WCS parameters in a QPOE file.	xproto
wcsxymatch	- Generate matched pixel lists using the image wcs	immatch
wdecon	- Deconvolve window from power spectrum using FFT.	grtools
wdisplay	- Display the current GOES weather pictures	nlocal
weather	- How to access weather pictures and forecasts	nlocal
weights	- insert weights in image or time series files	merge
wfits	- Convert a list of IRAF images into FITS image data	dataio
wfits	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
wfits	- VII.I Using the Computers at CTIO (appendix)	index
wfixup	- Interpolate over bad columns in a WF/PC frame.	wfpc
wfpc	- Tasks for calibrating WFPC and WFPC-2 data.	hst_calib
wfpc2color	- Transform QDWFPC2 instrumental magnitudes to standard colors	mxtools
whole	- Fix header information to extract the whole slit	sam
widstape	- Convert ONEDSPEC spectra to IDSOUT text format	mtlocal
width	- Esimate power spectrum line width mode frequency and l.	grtools
wiener	- Deconvolve a 2-dimensional image using a noniterative	restore
windecon	- Deconvolve window from power spectrum using brute force.	grtools
window	- Adjust the contrast and dc offset of the current frame	iis
window_stat	- window statistics for individual site days	qasun
wlmcalc	- calculates spurious modulation (i.e. wide-band) correction image	velcal
wlmcor	- corrects oscillation image for spurious (i.e. wide-band) effects	velcal
wmef	- Create MEF file from data, variance and DQ images	gemtools
wmosaic	- Mosaic the four WF/PC frames into one image.	wfpc
woffsets	- Find the wavelength offsets using cross-correlation.	z_calib
words	- Break a file up into a stream of words	lists
wphot	- Measure magnitudes for a list of stars with weighting	apphot
wregister	- Register 1-D or 2-D images using the image wcs	immatch
write	- I.5 Tutorial #2 Reading and Writing Data to Tape (irafintro)	index
write	- Write a binary block of data to a file	fio
writevt	- Write an IRAF image to tape in vacuum telescope format.	vtel
writevt	- Write an IRAF image to tape in vacuum telescope format.	vtelold
writing	- I.8 Common Problems: Their Cause and Cure (irafintro)	index
wshift	- Find wavelength offset from the spectral line template.	z_calib
wspectext	- Convert 1D image spectra to ascii text spectra	onedspec
wstatistics	- Compute & print WF/PC image pixel statistics.	wfpc
wtextimage	- Convert an IRAF image to a text file	dataio
wyf_red	- CCD process and extract spectra from a wyffos frame	wyffos
wyffos	- WYFFOS data reduction [up]	rgo
wyfgeom	- Define the order of fibres and direction of dispersion	wyffos
x1d	- Extract a collection of 1-D spectra from a calibrated 2-D	stis
x2d	- Perform 2-D rectification of calibrated STIS images.	stis
xapphot	- Experimental aperture photometry package	xdwred
xapropos	- List all tasks related to a given subject	xray
xastcat	- Experimental catalog access package	xdwred
xbox	- Quick solution of mask alignment (using boxes)	ucsclris
xc	- Compile and/or link a program	softools
xcmap	- Calculate a mapping function using crosscorrelation	gongcor
xdataio	- Tasks to convert data to/from FITS format	xray
xdimsum	- Experimental dimsum package	xdwred
xdimtogf	- Convert a GEIS file with xtra dimension plus a table to GEIS	fitsio
xdisplay	- Load an Xray image into the display window	xplot
xdshifts	- Compute shifts using image display and centroiding techniques	xdimsum
xdshifts	- Compute shifts using image display and centroiding techniques	xirred
xexamine	- Examine a Qpoe using the image display and WCS coordinates	xplot
xexamine_r	- Examine a Qpoe using the image display and WCS coordinates	xproto
xfirstpass	- Driver script for first pass processing steps	dimsum
xfirstpass	- Driver script for first pass processing steps	xdimsum
xfirstpass	- Driver script for first pass processing steps	xirred
xfshifts	- Compute shifts using star finding and centroiding techniques	xdimsum
xfshifts	- Compute shifts using star finding and centroiding techniques	xirred
xhadd	- add an X-ray history record to an image or qpoe	ximages
xhda	- Build input list for EPHVEL.	ephem
ximages	- Additions to IRAF images package	xray
ximtool	- Invoke SAOIMAGE for use with IRAF/XDISPLAY	xplot
xirred	- Experimental Deep Wide IR reduction package	xdwred
xlist	- Utility for generating file lists used by subloc and slm	dimsum
xmaskpass	- Driver script for mask pass processing steps	xdimsum
xmaskpass	- Driver script for mask pass processing steps	xirred
xmaskpass	- Driver script for second pass processing steps (with masking)	dimsum
xmosaic	- Driver sript for first pass and mask pass processing steps	xdimsum
xmosaic	- Driver sript for first pass and mask pass processing steps	xirred
xmshifts	- Compute shifts using star finding and list matching techniques	xdimsum
xmshifts	- Compute shifts using star finding and list matching techniques	xirred
xnregistar	- Mosaic the images using sub-pixel replication and masking	xdimsum
xnregistar	- Mosaic the images using sub-pixel replication and masking	xirred
xnzap	- Remove cosmis rays from images using average filtering	xirred
xnzap	- Remove cosmis rays from images using averaging filter	xdimsum
xobsolete	- Tasks that will soon be removed from the system	xray
xphotcal	- Experimental photometric calibration package	xdwred
xphotred	- Experimental Deep Wide photometric calibration package	xdwred
xplot	- Plotting routines for XRAY data	xray
xproto	- Crude tasks, currently under development	xray
xregister	- Register 1-D or 2-D images using x-correlation techniques	immatch
xregister	- Register 1-D pr 2-D images using x-correlation techniques	nmisc
xrfits	- read a fits file into IRAF IMAGE (imh) or TABLE (tab) format	xdataio
xrshifts	- Compute shifts using x-correlation techniques	xdimsum
xrshifts	- Compute shifts using x-correlation techniques	xirred
xrv	- GUI Version of the RV Package	guiapps
xrvf	- Examine the RVF to determine FSR and gap.	taucal
xslm	- Sky subtract images using a local minmax combined sky, w/ or w/o masking	dimsum
xslm	- Sky subtract images using running mean	xdimsum
xslm	- Sky subtract images using running mean	xirred
xspatial	- X-ray spatial analysis package	xray
xspec_interface	- for information on how to convert PROS spectral data	xspectral
xspectral	- X-ray spectral analysis package	xray
xt_csum	- Sum of image columns using column access procedure	xtools
xt_csumb	- Buffered sum of image columns using column access procedure	xtools
xt_lsum	- Sum of image lines	xtools
xt_lsumb	- Buffered sum of image lines for moving sums	xtools
xtalkcor	- Apply crosstalk corrections	mscred
xtalkcor	- Apply crosstalk corrections	mscred
xtcoeff	- Compute crosstalk coefficients	mscred
xtcoeff	- Compute crosstalk coefficients	mscred
xte	- X-ray timing explorer package	ftools
xtiming	- X-ray timing analysis package	xray
xtop	- Convert a complex image to Power/Phase.	grtools
xwhen	- Post an exception handler	etc
xy2rd	- Translate a 2-D image pixel coordinate to right ascension	imgtools
xy2sky	- Transform from pixel to sky coordinates using WCS keywords	heasarc
xy2xy	- apply a computed linear model to a set of [x,y]	slalib
xyacc	- Build an SPP language parser	softools
xyeq	- Get (ra,dec) from a table of (x,y) given the pltsol coeff.	gasp
xyxymatch	- Match pixel coordinate lists	immatch
xyztable	- Interpolate table values, writing results to a table.	imgtools
xyztoim	- Interpolate table values, writing results to an image.	imgtools
xzap	- Remove cosmic rays from images using median filtering	xdimsum
xzap	- Remove cosmic rays from images using median filtering	xirred
ybase	- Compute Y-base for aperture centers.	y_calib
yddintplot	- Interactively examine dead diode locations.	fos
yfind	- Find Y-deflections of HRS spectral orders.	z_calib
yfit	- Compute Y-deflection calibration coefficients.	z_calib
ymkmu	- Place wavelength information into headers.	fos
ypeakup	- Analyse ACQ/PEAK observations.	fos
yratio	- Take ratios between ACCUM observation bins.	fos
zd	- convert hour angle and declination to zenith distance	slalib
zerocombine	- Combine and process mosaic zero level exposures	mscred
zerocombine	- Combine and process mosaic zero level exposures	mscred
zerocombine	- Combine and process mosaic zero level exposures	multampccd
zerocombine	- Combine and process mosaic zero level exposures	multampccd
zerocombine	- Combine and process zero level images	ccdred
zerocombine	- Combine and process zero level images	quad
zerocombine	- Combine and process zero level images	quadred
zerocombine	- Combine and process zero level images	xccdred
zeropt	- Enter the zero point constants into a cube header	fabry
zeros	- make a series of zero observations	ccdacq
zflatfield	- Determine a flat field.	z_calib
zones	- Determine electron temps & densities in 3-zone nebula	nebular
zoom	- Zoom in on the image (change magnification)	iis
zwavecal	- Create new wavelength dispersion based on WAVE spectra.	hrs