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Last Post

rotate a FITS file and update the WCS...Started by:iraf_astro, 12/05/2015 07:17PM
Hi,

I had been struggling with the following
problem. I have a FITS image, which I
would like to compare to another FITS
image. I found the task " imrot" in IRAF
under wcstools, which performs this
task, but unfortunately only for
multiples of 90. I ...

1958

By: fitz

12/05/2015 07:41PM

implot DONOT show any diagram but mes...Started by:chaorun, 11/26/2015 12:10PM
Hey, guys

I am a new student of astronomy, I just
install IRAF this afternoon.
But I have a question about the command
‘implot’.I need ur help!
My enviroment is a new Ubuntu in Vitrual
BOX.
here is the messy codes:

implot fm920001.fits
s...

1141

By: fitz

11/26/2015 04:01PM

Analysing FITS files with WSTART1Started by:jsmoker, 11/17/2015 12:03PM
Hello,

I am working on some data reduced with
the UVES pipeline. The "merged" spectrum
produced by the pipeline has ripples in
it hence I am hoping to do the last part
of order merging "by hand" in IRAF.

The fits file contains 20 different
orders,...

2026

By: fitz

11/20/2015 04:55PM

Unable to start IRAF with login.clStarted by:wpbowman, 11/15/2015 01:31AM
I am unable to start IRAF with a
login.cl file. I run IRAF 2.16 on Linux
Fedora 19 and it has worked fine for
months. I was working in IRAF yesterday,
shutdown my computer when finished, and
received the following error today when
attempting to start IR...

5302

By: wpbowman

11/17/2015 08:22PM

mknobsfile errorStarted by:clobo, 11/05/2015 10:25AM
Hello,

I have installed IRAF v2.16.1 in Fedora
20 and used it to calibrate standard
star fields as usual (I've done this
before with previous IRAF versios
without any problem). However, now I am
stumbling upon an error while trying to
run mknobsfile....

1571

By: clobo

11/10/2015 12:11PM

Error : no release file Started by:AndyR, 10/22/2015 09:28PM
Greetings,

I was successful install IRAF on my mac.
Upon typing cl when it says welcome to
IRAF etc.

Along the lines it says, Error : No
release file

Does anybody know what this is and why?
I would appreciate any recommendations
to how to fi...

1690

By: fitz

10/23/2015 06:43PM

MSCIMAGE issueStarted by:mcp, 10/17/2015 08:53PM
Whenever I try to use MCSIMAGE I get
this: " ERROR: No input image data found
in 'input.fits' ". My input files are a
mosaic images and I can open them
normally using MSCDISPLAY. Following
http://www.noao.edu/noao/noaodeep/ReductionOpt/frames.html,
I us...

968

By: fitz

10/21/2015 05:10PM

Flatcombine acting Strange (?)Started by:AJH_IU, 10/21/2015 02:31PM
I'm having issues combining my flats
(already separated by filter) using
flatcombine. For full disclosure the
motivation for this is my A305 class and
we are supposed to be "getting our feet
wet" by reducing some data. I have
brought this to my AI's and...

935

By: fitz

10/21/2015 04:18PM

2D image change unitsStarted by:sscibell, 10/12/2015 10:38PM
Hello,

Is there a task in iraf that can convert
units of a 2D image? For example, from
deg vs. wavelength to arcsec vs.
velocity?

Thanks!
SS

662

By: fitz

10/21/2015 04:01PM

MSCRED Warning: Cannot open file (una...Started by:mcp, 10/05/2015 01:59AM
Hi,

I'm new to IRAF, and am reducing images
using mscred. When trying to use
mscskysub, it gives: "Warning: Cannot
open file (unavail)," and I'm unable to
open the outputs. Why is this
happening?? I get the same warning when
mscdisplaying my input im...

1596

By: fitz

10/05/2015 06:18PM

imarith help fixStarted by:Jason Quinn, 09/30/2015 09:40PM
In example 4 in imarith's help, the
pixtype and calctype values are
switched. The command should read

[code]
cl> imarith image1 / image2
image3 pixtype=short \
>>> calctype=real
title="Ratio of image1 and image2"
[/code]
...

697

By: fitz

09/30/2015 10:34PM

How to specify FITS extension for apa...Started by:jsb3r, 09/29/2015 04:29PM
I'm having trouble getting a script to
specify the fits extension for apall
within a huge ECHELLE reduction package.
Below is the error I keep getting.

***************************************************************
Resampling the spectrum by a fac...

2988

By: jsb3r

09/29/2015 08:17PM

n2gaussfitStarted by:sscibell, 09/25/2015 10:35PM
Hello,

I am new to using the n2gaussfit task
and I was wondering if, for example, if
when you type the command:

n2gaussfit image.fits[134:153,367:409]
out.dat

Is it creating a 19x42 box to then fit a
2D Gaussian to? So do the Xcent and
Ycent va...

828

By: fitz

09/29/2015 05:32PM

How to select objects which match the...Started by:constant, 09/26/2015 01:49PM
Hi,

I use noao.digiphot.daophot.psf task to
get psf image of a object. I want to
select objects which match the psf.

Which task or package can help me do
this job?

Thanks!!

Weida Hu

695

By: fitz

09/29/2015 05:04PM

SAOImage DS9 7.4b7 is availableStarted by:joye, 09/23/2015 04:43PM
SAOImage DS9 7.4b7 is available at
http://ds9.si.edu/site/Beta.html.

This version contains a number of bug
fixes addressing issues with IRAF. In
particular, a problem with imexamine
introduced in earlier beta versions has
been corrected.

Regards
...

795

By: joye

09/23/2015 04:43PM

Three computers in the same office no...Started by:andrej, 09/21/2015 08:10PM
Greetings.
There are three computers in my office
and I am in the process of testing IRAF
with it. I am working to get IRAF
installed on another laptop, and I am
testing a working copy on my linux box.

I noticed, however, that even my
"working" copy...

1487

By: fitz

09/21/2015 08:13PM

Getting rid of standing wavesStarted by:sscibell, 09/18/2015 08:46PM
Hello,

Is there is a way in iraf to get rid of
standing waves in spectra files?

Thanks!
S

674

By: fitz

09/18/2015 11:12PM

Setting daopars.maxnstar in PyRAF to ...Started by:debrunlm, 09/16/2015 02:28PM
Hi,

I have been having an issue trying to
set daopars.maxnstar to a higher value
than the default of 50000 in PyRAF. In
the script I have
iraf.daopars.maxnstar.p_max = 200000
this results in the following error.

Traceback (innermost last):
File...

741

By: fitz

09/16/2015 07:53PM

Procedure ErrorStarted by:sscibell, 09/14/2015 06:51PM
Hello,

I am trying to pass parameters to script
tasks and I keep getting an error saying
"ERROR: Illegal variable declarations."
I tried simply following a script from
'IRAF CL Script Tips & Tricks' :

ecl> procedure askit (question)
>>>bool ...

1011

By: fitz

09/15/2015 10:42PM

Can you automate an imexam task?Started by:sscibell, 09/06/2015 08:07PM
Hello,

Is it possible to automate a cursor
command in imexam so it can be
incorporated into a script? It seems
that you can do this if you give image x
and y positions and then the key stroke.

However, I am trying to determine the
y-location of a...

1023

By: fitz

09/10/2015 04:23PM

Need to find 2nd highest peak in a do...Started by:raybutler, 09/04/2015 08:10AM
Hi,

Normally I can script my way out of
trouble, but I've been struggling with
this for a while.

I need to be able to automatically find
the 2nd highest peak in a double-peaked
graph/histogram - like the peak at z ~
700 in the following screengrab...

2053

By: fitz

09/05/2015 10:03PM

imcopyStarted by:sscibell, 09/03/2015 04:50PM
Hello,

I am trying to use imcopy to copy a
portion of a file but when I do that,
for example:

imcopy big.fits[1:1201, 400:799]
small.fits

I get the following error:

ERROR: too many positional arguments for
'imcopy'

Any idea why I am getti...

1391

By: fitz

09/03/2015 04:52PM

Error 'Unable to open parameter file ...Started by:sscibell, 09/02/2015 10:19PM
Everything was working (that is the
parameter files were being written just
fine) but then I tried using the command
'epar mskexpr' and when I tried to
change dimensions I got an error saying
'Unable to open parameter file
`uparm$promskexr.par''. After ...

2185

By: sscibell

09/03/2015 04:51PM

IRAF running very slowly Started by:jsmoker, 08/26/2015 03:19PM
Hello,

I have a problem with IRAF that I wonder
if anyone could give me pointers to help
fix. Basically IRAF is running very
slowly (about 10 minutes to startup and
3 minutes to do an imhead. Doing an 'ls'
on the other hand is fast. I am running
IRAF...

1720

By: jsmoker

08/29/2015 09:09AM

Meta codeStarted by:stefano, 08/26/2015 12:05AM
Hello,

I would like to know if there is a way
to read the contents of a meta file. In
particular, I am interested in the meta
code generated by the task "FITPROS". It
shows the fit, continuum and data all in
the same plot. I would like a way to
read ...

625

By: fitz

08/26/2015 04:04PM

Cutting out postage stamps around giv...Started by:sa14722, 08/06/2015 12:46PM
Hi,

I have two images of a cluster taken
from two different filters. I've ran
photometry on the two images and have a
list of RA & DEC of objects that are
common in both images. I want to cut out
small postage stamps of these objects
with a user ...

1575

By: sa14722

08/12/2015 12:54PM

Cursor interaction broken in photcal....Started by:mjdrin, 12/06/2013 10:51PM
Hi.
Strange problem with new install of
2.16.1 on a Linux workstation.

photcal.fitparams will not let me select
points with the cursor to delete. It
deletes the left-most point independent
of where the cursor is. I ran
specred.splot on the same ma...

4566

By: Chuck Horst

07/27/2015 03:50AM

using imexam with ra/dec coordsStarted by:jcadien1, 07/21/2015 03:32PM
For a long time I have used imexam in
bash scripts, passing to it coords in
x,y format. I now would like to use
ra/dec instead. I have tried this and I
get garbage output. I have played with
the wcs parameter, as well as the
formats. Nothing works. Whe...

694

By: jcadien1

07/21/2015 03:32PM

trouble getting fc to compile my old ...Started by:buta, 07/20/2015 03:43PM
Hi,

I have a relatively new MAC OSX desktop
(with Yosemite 10.10.4 upgrade) and have
installed iraf using iraf-macosx.tar.gz.
As far as I have been able to tell, the
installation was successful. However, I
have had trouble getting task fc to
compile ...

950

By: buta

07/20/2015 03:43PM

List error on MacOSX 10.9.5 under V2.16Started by:ltacconi, 07/16/2015 12:39PM
I'm having weird problems (that I've
never seen before) when I'm now trying
to use IRAF (V2.16) on my iMac running
Mac OS X 10.9.5. Specifically, I'm
using the task 'cosmicrays' (which I've
used in the past a zillion times). I
haven't done further tes...

1198

By: ltacconi

07/17/2015 01:09PM

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