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Last Post

RGB Fits image reduction with iraf?Started by:ambrosc, 05/31/2018 11:55AM
Hi,

I got an observation run from a friend,
who tested his new SBIG STL-8300c
camera. It's the same camera like the
ST-8300m but with the color chip.
I got bias frames, flats and darks but
I'm not sure if I can do the reduction
in the same manner l...

837

By: ambrosc

06/05/2018 01:01PM

Scripting questionStarted by:massey, 05/29/2018 04:14PM
I’m calling “phot” within a
script, and I’d like to give it three
different aperture sizes. If I were
doing this with numbers I would say:

phot(s1,"default","default",datamax=dataxv,datamin=datanv,apertur=“3,5,7",calgori="none",interact-,...

670

By: fitz

05/29/2018 04:21PM

Daophot PSF: star is outside the imageStarted by:hbarker, 10/20/2017 02:29PM
I'm trying to build a psf for an image,
and successfully run daofind, daophot
and pstselect. I have >1000 detected
stars in my field, and told pstselect to
choose 100, which it does fine. Hoever,
when I try to run psf, I get an error
for each star "Star...

1081

By: fitz

11/02/2017 12:53AM

PyRAF doCmdline fail on startupStarted by:aeschneider714, 10/16/2017 03:39PM
Hi all,

I have been trying to figure this one
out all weekend, but I can't seem to
find a similar error online. I have the
anaconda environment with the legacy
IRAF/PyRAF installation. IRAF works
perfectly fine and I have installed
iraf-all and pyraf...

1000

By: fitz

10/16/2017 03:47PM

msccmatch interactively, deleting dat...Started by:mdcleir, 08/31/2017 08:59AM
Hi,

I am using the msccmatch tool to match
the WCS of different exposures.
I want to use this task interactively in
order to check if the fitting does a
good job.
When I run the task, the first plot
indeed pops up in the xgterm.
But, if I want to ...

1424

By: valdes

09/08/2017 03:51PM

Fitting balmer lines with emission+ab...Started by:Myrddin, 06/27/2017 12:48AM
Hi everyone,

I am dealing with a high S/N calibrated
1D spectrum of a star-forming galaxy. I
can see the emission in the balmer lines
(typical from SF galaxies) together
with the absorption in the same
wavelength from the underlying stellar
populat...

1618

By: valdes

07/06/2017 07:00PM

Trouble reading lists with some proce...Started by:jsb3r, 06/22/2017 04:59PM
I have IRAF running on two separate Mac
OSXs. One machine is running Mac OSX
10.8 and IRAF v2.16 and CCDPROC handles
lists without problem. However, when I
try to run CCDPROC on the Mac OSX 10.11
with the following call:

ccdproc images=@targets out...

1621

By: fitz

06/22/2017 05:10PM

cl script is not running on unix term...Started by:sapna, 06/06/2017 02:50PM
Dear all,

Does anyone know how to run *.cl scripts
on the normal unix terminal??

For eg. I am running a script from the
normal unix terminal as:

$ cl < /home/sap/Script/clean_photo.cl

and I am getting an error like:

astutil>astutil>astuti...

1368

By: olebole

08/20/2017 08:41AM

problem with scriptStarted by:fitz, 05/27/2017 03:21AM
[color=red][b][Moderator's Note:
forwarded from story
submission[/b][/color]

I am having problems with a script that
reduces to the following simple script
to change some parameters in photpars
and fitskypars and run
digiphot.apphot.phot. When I run ...

1466

By: fitz

05/27/2017 03:33AM

transformation equations for SDSS fil...Started by:iraf_astro, 05/09/2017 01:03AM
Hi,

I have been struggling lately to find
transformation equations to convert
instrumental magnitudes to calibrated
ones for the ugriz system. In IRAF,
landolt transformation equations
(photcal/catalogs package) are provided
for UBVRI system, but the...

691

By: fitz

05/09/2017 04:35PM

Streaks on image after geotranStarted by:dantes, 04/18/2017 06:11PM
Hi, I'm new to IRAF and I've run into a
bit of a problem. I'm geotranning an
image against another, but whenever I do
it comes out with these awful streaks
which are quite annoying. I've tried
messing with the value for "boundary"
and the value for "con...

850

By: valdes

04/25/2017 09:39PM

Problems with identify/reidentifyStarted by:grayro, 04/06/2017 03:46PM
Hi, I am writing an IRAF script for an
observational spectroscopy course that I
am teaching which takes a previous
wavelength solution and applies it to
comparison spectra for stars taken that
night. I have written and used scripts
like this many time...

895

By: grayro

04/07/2017 12:30AM

Syntax Error on procedure callStarted by:LukeD, 03/02/2017 07:51AM
I am trying to create my first procedure
script by creating a .cl script, placing
it in /home/iraf/listcreate.cl and then
running
task listcreate =
/home/iraf/listcreate.cl

but whenever I try to run it by typing
'listcreate' I get an error:
**: pr...

1166

By: fitz

03/08/2017 05:15PM

IRAF and XGterm on DebianStarted by:fitz, 01/23/2017 04:46PM
[b][color=darkred][Moderator's Note:
Forwarded from story
submission][/color][/b]

Hi, I am trying to install IRAF on a
64-bit Debian computer. IRAF seems to
have installed fine using the
instructions on
http://www.astronomy.ohio-state.edu/~khan/ir...

1787

By: fitz

01/23/2017 04:48PM

String manipulation in IRAFStarted by:grayro, 01/20/2017 09:58PM
Hi, I am having problems with some RA
and DEC keywords in fxcor. fxcor wants
the values to be delimited with colons,
such as "12:30:56", but I have some
spectra which have spaces instead: "12
30 56" and fxcor chokes on those. I
want to be able to edi...

1168

By: fitz

01/20/2017 10:37PM

missing dataStarted by:duvall, 12/13/2016 12:42PM
Running iraf on linux.

Is there some way to get routines that
use image interpolation to not use the
missing values? I have an image that
has some large negative numbers for
missing.
jan2.fits[1024,1024][real]:

From the header.
BLANK = ...

1307

By: valdes

04/25/2017 10:47PM

Error when running command cl Started by:Maria, 12/09/2016 05:03PM
I have just install IRAF in my computer
using the Cygwin but when I try to run
the command cl to open IRAF th following
error appears:

os.zgtenv: cannot open
`/usr/include/iraf.h'
task `cl' has no param file
Fatal startup error. CL dies.

I have...

1784

By: fitz

12/09/2016 07:46PM

agetcat on usnob1@noao gives not 404 ...Started by:Santiago, 12/08/2016 01:45PM
Hi, i'm trying to solve some plates with
agetcat, ccmap, etc, and i cannot
download the usnob1@noao region, i get
an html 404 not found page. Was this
task deprecated or some? Maybe my way is
not fancy, anyways to plate solve with
other iraf package? My...

907

By: fitz

12/08/2016 04:23PM

Error when running command clStarted by:Maria, 12/02/2016 10:00AM
I have installed Iraf in Cygwin but when
I try to run the cl command this error
appears:

os.zgtenv: cannot open
`/usr/include/iraf.h'
task `cl' has no param file
Fatal startup error. CL dies.

1243

By: fitz

12/06/2016 09:11AM

Rebin to simple wcs using output from...Started by:dmw8f, 11/29/2016 11:00PM
We have used ccmap to create a database
file (.db) containing 3rd order
polynomial coefficients to link CCD
pixel coordinates to sky RA DEC
coordinates using GAIA stars. We now
want to use this database file to rebin
the image into a linear image with s...

1347

By: valdes

12/06/2016 11:33PM

IRAF ExpressionsStarted by:blackhole612, 11/14/2016 08:02PM
Hello,

I am translating some IRAF code to
another programming language, but I
can't figure out this snippet of code
below.

n_expression="z"//n_i//"*(nclus=="//n_i//")+1000.*(nclus!="//n_i//")"
print(n_expression, >tmpexp)
tcalc(tmpall,"z"//n...

872

By: fitz

11/14/2016 08:52PM

ERROR: integer divide by zeroStarted by:mnmaulana, 11/06/2016 06:43AM
Hi all,
i'm new to iraf. i'm trying to display
1-D image i made but when i use display
command i get this error "ERROR: integer
divide by zero", anybody know why i get
this error and how to fix it?

thanks,
mnmaulana

1039

By: fitz

11/14/2016 05:17PM

fields task keeps asking Started by:Gaba_p, 11/04/2016 09:35PM
I can't seem to be able to run the
'fields' task without it asking me to
input the 'Fields to extract'.

This happens even with mode='h'.

Example:

ecl> fields.mode='h'
ecl> fields.fields='1,2'
ecl> fields.lines='1'
ecl> fields.files='test.dat...

762

By: fitz

11/14/2016 05:20PM

directory names with spacesStarted by:duvall, 10/18/2016 12:45PM
If I have a directory name with spaces,
I can't seem to cd to it:

(in a shell)
mkdir "test 2"
ls
test 2
cd "test 2"
(ok)

(in iraf)
dir
test 2
cd "test 2"
ERROR: Cannot change directory to 'test
2'
called as ...

This seems to happen on...

1027

By: fitz

10/18/2016 12:53PM

OSX SierraStarted by:fitz, 09/23/2016 05:23AM

FWIW, it appears that there are NO new
issues to report wrt IRAF, X11IRAF or
DS9 under the new OSX 'Sierra' release.
It is possible that if upgrading from
Yosemite (or earlier versions os OSX)
some of the problems experienced with
the El Capitan upgr...

1727

By: fitz

10/12/2016 09:32PM

tfitlin in IRAF helpStarted by:blackhole612, 09/15/2016 09:00AM
Hello,

I am working on converting some IRAF
scripts to Python, and I came across
this command that I couldn't find in the
docs, Google search, or on this forum.

What does the command tfitlin do
exactly? Or is there documentation on it
somewhere? ...

979

By: fitz

09/15/2016 05:41PM

imalign trouble Started by:Liz, 07/24/2016 01:23AM
So I am trying to align 17 files after
making all the corrections. I have a txt
file with the reference star coordinates
(I am only aligning with one star) that
looks like
416.3 230.5
and a txt file with all the shifts
starting with the reference f...

1182

By: fitz

07/24/2016 04:22AM

Help with a simple zerocombine scriptStarted by:tasso1db, 07/22/2016 05:38PM
Hello,

I am trying to write a very simple
reduction pipeline for my schools
observatory. However I am getting the
following error: "Too many positional
arguments for 'zerocombine'" on line 12.
I'm slightly confused as to how I could
have too many ar...

791

By: fitz

07/22/2016 05:45PM

imstack for different galaxiesStarted by:michgradstudent, 06/30/2016 04:30PM
I want to stack 50 different galaxies on
top of each other, each having different
central coordinates and in very
different parts of the sky.
I'm trying to calculate the cumulative
light from all of them, and stacking is
a nice way to do this.

Is th...

820

By: fitz

07/09/2016 03:36AM

Tasks not recoginzing subsections in ...Started by:dagorym, 06/17/2016 04:59PM
I'm trying to do a simple listpixels
command like this:

listpixels image1.fits[234:244,124:134]

and instead of giving me just the pixels
in the subsection specified, it's giving
me all the pixels in the file. It's
like it's not even recognizing t...

660

By: fitz

06/17/2016 08:48PM

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