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multicolor gkimosaic?Started by:Gordon, 05/03/2010 04:54PM
A journal referee has asked me to revise
a mosaic plot produced using gkimosaic
so that selected plots within it are in
different colors. Can this be done? If
it is actually or nearly impossible I'll
be happy to say so to the referee.

1147

By: fitz

05/03/2010 04:54PM

Scombine changes dimensionStarted by:rohit, 03/31/2010 11:25PM
I have two sets of two files which I
combine to create two individual files.
I have been using SCOMBINE task for
this. It has worked for most expect
this. I do not understand why the task
is changing the dimensions. Here is what
the imeader command give...

1333

By: fitz

03/31/2010 11:25PM

wcsctran and SIPStarted by:snd22, 03/30/2010 05:03PM
Hello,

I would like to use wcsctran (or an
equivalent task) to convert a list of
pixel coordinates on an image to a list
of RA/DEC sky coordinates using the WCS
defined in the image header. However, I
also need the conversion to respect the
SIP distor...

1382

By: fitz

03/30/2010 05:03PM

FORS2 data, problems with wavelength ...Started by:Serraph, 03/30/2010 12:36PM
I have some FORS2 data taken in the MOS
mode. I understood the ESO pipeline
reduces the data to the point where I
can extract the spectra without out the
need for a separate wavelength
calibration. However, when I extract
spectra from the image i get th...

2914

By: fitz

03/30/2010 12:36PM

Calling daoedit from within CL scriptStarted by:JanRap, 03/19/2010 02:39PM
Hi, I hope I'm posting this in the
correct forum.

I am trying to call the 'daoedit' task
from within a CL script, but I am
struggling with the syntax.

Firstly I created a .coo file containing
the coordinates and type (target,
comparison or standard) o...

1817

By: fitz

03/19/2010 02:39PM

help for the installationStarted by:Guest, 03/09/2010 01:10PM
Hello
I need some help about the instalation
to the package gmisc.
I download the readme, but the
instalation its not good because its
not work.
I'm working with Ubuntu 8.10 and the
IRAF 2.14.
My problem is in the point 3)
after the ftp, in the uncompr...

960

By: fitz

03/09/2010 01:10PM

Imsurfit scriptingStarted by:spacermase, 03/07/2010 02:40AM
Hello all,

So, this is probably a very simple
mistake I'm making, but I haven't been
able to figure out what it is.

I'm writing a script that involves
imsurfit. The relevant part of the
script is as follows:

imsurfit ("@input.list", "@fitted.list",
1...

1153

By: fitz

03/07/2010 02:40AM

polyphot aperture area calculation wr...Started by:mboquien, 03/06/2010 12:08AM
Hello,

I have noticed that the area calculated
by the polyphot task gives a result
which is different than what is computed
manually. For instance for this polygon
IRAF gives 125.4778 and computing
manually i get 123.969.

741.34 747.41
748.38 748....

1350

By: fitz

03/06/2010 12:08AM

Cosmic Rays and apall extraction of l...Started by:lchomiuk, 02/24/2010 04:14AM
I'm extracting some rather low
signal-to-noise spectra with apall, and
I've noticed that cosmic rays (either on
the source spectrum or in the background
region) have a very strong and
distorting effect on the extracted
spectrum. I get large narrow spike...

2855

By: valdes

02/24/2010 04:14AM

mkobjects nxgsubStarted by:Guest, 02/19/2010 08:30PM
Hello,

I'm using iraf for modelling some
galaxies using mkobjects. The help pages
say that through nxgsub and nygsub it is
possible to modify the number of
pixels subsamples in X and Y, but when
doing "epar mkobjects" I can't find
such parameters. Coul...

1041

By: fitz

02/19/2010 08:30PM

Extracting spectra from a fits cubeStarted by:astroumut, 02/19/2010 11:03AM
Hi,

I have spectral data cube in fits
format. But I need to extract each
spectra to individual fits files. I
would like to know how to do that?

Thanks

Umut

2828

By: fitz

02/19/2010 11:03AM

Error in WAT of multispec headerStarted by:dr.michi, 01/27/2010 02:29PM
There is a bug in dispcor, which appears
if using more than one reference
spectrum, thus having more than one
dispersion function. There is no space
between the last coefficient of the
first function and the weight value for
the next function. This is n...

1678

By: pskoda

01/27/2010 02:29PM

WCS Distortion ConventionsStarted by:snd22, 01/26/2010 10:34PM
Hello,

I have some distortion correction
parameters for a particular instrument
that are in the SIP format (stored in
the headers as "A_m_n", etc.). I would
like to convert these parameters to the
TNX format (header parameters named
"WAT*"). From wha...

2110

By: valdes

01/26/2010 10:34PM

AMPLIST 22Started by:cosmologist, 01/20/2010 08:15PM
I have some data from CTIO with AMPLIST
22

But some of them are AMPLIST 22 OG 530
and the others AMPLIST GG 495.
Does anyone know the difference between
these 2?

Thanks!

1242

By: fitz

01/20/2010 08:15PM

Problems with the installing x11iraf-...Started by:glsmen, 01/16/2010 01:36PM
Please help me!
When run the install file of the
x11iraf-v1.3.1. is given next the error
++++++++
System app-defaults directory (none
found):
Installing app-defaults in none ...[
FAIL ]
ERROR: Cannot copy 'none' to none
++++++++

Wherein my problem? ...

1422

By: fitz

01/16/2010 01:36PM

Gemini longslit MEF image arithemticStarted by:kkwitter, 01/15/2010 10:02PM
Hi Mike,

I need some help working with Gemini
GMOS longslit spectra - they are MEF
files, and I haven't been able to
successfully copy, move or perform image
arithmetic on them as a whole. I can do
some things extension-by-extension, but
I would like t...

1429

By: fitz

01/15/2010 10:02PM

continuum of a spectrumStarted by:kwkchan, 12/07/2009 09:10AM
Hi Does anyone know how to find the
continuum of a spectrum with iraf?

2004

By: fitz

12/07/2009 09:10AM

Combining two spectra from two differ...Started by:rohit, 12/01/2009 05:31PM
I would like to combine two spectra
taken on the same instrument with the
same setup of the same star but at two
different epochs (particularly 5 months
apart). How do I combine them?

1977

By: fitz

12/01/2009 05:31PM

HST ACS weight file and mask file?Started by:fornax, 12/01/2009 06:53AM
First, I am not an observer, hence may
not know common(trivial) tasks in Iraf.

I am trying to perform isophotal
analysis using the IRAF task "ellipse"
on ACS WFC images (that have NOT been
dithered but have been drizzled). The
resulting file is a mult...

2551

By: fitz

12/01/2009 06:53AM

wtextimage format=???Started by:elainahyde, 11/24/2009 04:00PM
Greetings Irafians,
I am trying to use iraf to convert a
2D .fits image (a picture) into an ascii
file that is of the format: x,y,value.
I hope to then plot this file in gnuplot
and draw functions on top of it. I know
I can use wtextimage. The pro...

1971

By: fitz

11/24/2009 04:00PM

2201

By: fitz

11/19/2009 03:35PM

Equivalent WidthStarted by:rohit, 11/05/2009 12:17AM
Hello All,

I would like to know more about the
equivalent width (EW) calculations that
IRAF does in the SPLOT task ( using the
"e" key). Were could I get information
of how it computes EW?

I looked up on the following URL:
(http://stsdas.stsci.edu/ge...

2608

By: fitz

11/05/2009 12:17AM

promoting data type when output fitsf...Started by:rclark, 11/03/2009 07:42PM
I'm having a problem with the convolve
task in the images.imfilter
package.

ERROR (502, "floating point invalid
operation")

I have placed 4 files in the ftp area to
show the problem.
rgx1.fits an image that
will pass through ok
rgx2.fi...

2273

By: fitz

11/03/2009 07:42PM

Transforming a 1x1 binned image to 2x...Started by:dschumac, 10/31/2009 08:57PM
Does anyone know if there is a way in
IRAF to take an image that is binned 1x1
(so say 1024x1024 pixels) and change it
into a 2x2 (in this case 512x512 pixel)
binned image?

My problem is that I have star images
binned 1x1, but I only have correction
im...

5101

By: fitz

10/31/2009 08:57PM

adding a field in the headerStarted by:pascale, 10/10/2009 11:22PM
Hi,

During combining frames with bad pixel
masks, using the mscred.combine task, I
obtain the following error message :
Warning: Image header parameter not
found (EXTVER)
and the output image is not created.

So I tried to add this field (EXTVER) to
th...

2611

By: fitz

10/10/2009 11:22PM

nifs RonchiStarted by:monikval, 09/28/2009 12:47PM
Hi,

Getting the s-curvature+distortion with
GEMINI-NIFS, after running the task
NSREDUCE, iraf produces this message:
"
WARNING - NSREDUCE: The slit for image
comNRonchiOn5s3 does not match
the flat image slit.
Proceeding anyway.
N...

1625

By: jturner

09/28/2009 12:47PM

gscalibrateStarted by:andrea, 09/16/2009 11:08PM
hi,

i am trying to flux calibrate my
spectra. i have a perfectly normal
looking sens.fits. however, when i use
gscalibrate the continuum of the output
looks very different than expected, it
is way to bright in the blue. when i
divide by hand my spectr...

1867

By: fitz

09/16/2009 11:08PM

Passing changing coordinates to the p...Started by:JanRap, 09/16/2009 08:51AM
Hi

I ran the imcentroid task on a sequence
of about 300 fits frames and I now have
the correct coordinates of the three
sources I am interested in for each of
these frames. (Due to tracking issues
the sources sometimes jumped
substantially from one fra...

1516

By: valdes

09/16/2009 08:51AM

autoidentify with non-linear dispersionStarted by:jacosta, 09/09/2009 01:32PM
Hi there,
I'm trying to set up a semi-automatic
wavelength calibration for near IR
spectra. The spectral formats are very
reproducible since the instrument is
based on grisms which produce only few
configurations. I mean the spectral
range and dispersio...

1886

By: valdes

09/09/2009 01:32PM

GIF output from IRAF graphing programStarted by:dougmink, 08/28/2009 08:54PM
I want to spit out a gif file to
standard output from a graphics program
like splot or one of my rvsao tasks to
serve over the Web. Is there a way to
do this using the g-gif graphcap entry
in some way? Ideally, I would like to
avoid creating an interm...

1559

By: fitz

08/28/2009 08:54PM

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