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Last Post

Imarith error - is not an image or nu...Started by:fergusjm, 06/09/2015 02:56PM
Hello, while trying to flatten my data I
keep running into a problem.
The command I'm running is as follows:

imarith trim_18 / flat_hk_mar28_2015
trim_data_flat_18

However I keep receiving an error:

trim_18 is not an image or a number, I
kno...

3939

By: fitz

06/09/2015 06:34PM

IRAF Development Roadmap UpdateStarted by:Jason Quinn, 06/08/2015 10:20PM
The original IRAF Development Roadmap
was posted back on September 30, 2013.
It's now mid-2015 and approaching the
2016 change of development priority. Is
it possible to get an update on the
roadmap? For instance, which features
were chosen for develope...

1049

By: fitz

06/10/2015 05:20PM

FEROS DRSStarted by:giannicatanzaro, 04/09/2015 08:02AM
hello guys

I downloaded a FEROS tarball with data
like those ones:

r.FEROS.2006-06-20T04:16:45.241.1051.fits
r.FEROS.2006-06-20T04:16:45.241.1052.fits
r.FEROS.2006-06-20T04:16:45.241.1061.fits
r.FEROS.2006-06-20T04:16:45.241.1062.fits
r.FEROS....

1111

By: gmaravel

06/16/2015 04:19PM

SNR calculation in splotStarted by:gmaravel, 06/16/2015 04:59PM
Hi!

I know that the "m" keystroke in splot
gives the rms and snr of a spectrum.
However, I would like to understand how
this is calculated, but there is nothing
(obvious at least) at the help page of
splot.

I did a searvh in the forum to see if
...

3473

By: fitz

06/16/2015 05:05PM

Conversion of fits to txtStarted by:shruthi, 06/19/2015 06:18AM
Hello everyone,

I am having trouble converting my
spectra which is in fits to txt file.
I used wspectext but what I want is
instead of wavelength, I want velocity.

So description of what I am doing:
1. splot the spectra.fits
2. used keystroke v ...

3598

By: shruthi

06/19/2015 07:01AM

Cursor file problemStarted by:Sidh, 06/15/2015 08:47PM
Hi everyone,

I am a new IRAF user, and I have some
problem with the splot command.

I try to use it to save some
informations in a .log file but there is
no .log file registered at the end of
the operation.
Here is the line I use ;
[code]splot(nb...

1480

By: Sidh

06/19/2015 07:16PM

EUV Package - detpos not finding dete...Started by:DamianJC, 06/23/2015 10:19AM
Hi All,

This may be obscure and outdated, but
I am trying to make some EUVE light
curves with the
EUV package (v 1.9 from 2/1/00 on a mac
with IRAF 2.16) and one of the
functions, detpos (detector position)
is not finding the reference data,
eve...

930

By: DamianJC

06/26/2015 06:43AM

Imarirth outputting an MEFStarted by:jbs045, 06/18/2015 03:43PM
I'm a Pyraf user, and I think that it
may have something to do with my
problem, but I am using imarith to
multiply a constant by a non MEF fits
file, and for whatever reason, it is
outputting a MEF when I don't want to
it. Here is my surrounding code:
...

947

By: fitz

06/30/2015 05:47PM

segmentation violationStarted by:wuxiaohan, 06/29/2015 11:54AM
I was doing photometry for a star
cluster, with ds9 opened. When I ran
daofind, the file image.coo.* appeared
in the process but vanished when it
ended, while den*.fits remained. And I
got this "segmentation violation". I
didn't find out what the proble...

2346

By: wuxiaohan

07/03/2015 07:23AM

dispersion axis in iraf of UrekaStarted by:haha, 07/06/2015 11:52AM
It seems there is no effect if I use
noao.twodspec
apextract
apextract.dispaxis=2
when the dispersion axis is along
columns.

I am using IRAF in Ureka.
How to set the dispersion axis exactly?

794

By: haha

07/06/2015 12:53PM

ds9 issue (saving image with coordina...Started by:TheWonderer1, 07/06/2015 07:11PM
Hi there,

I am not using this for any true kind
of publication but more so we can
reference material. However, it is very
important that I have a coordinate
system where I can plot the WCS.
Whenever I try to save as a PNG or JPEG
it does not functio...

1348

By: TheWonderer1

07/06/2015 07:11PM

Extremely large pixel valuesStarted by:fergusjm, 07/09/2015 03:46PM
Hello, I'm having a problem after
dividing my trimmed frames by the
response to the combined flat field.

# IMAGE NPIX
MEAN STDDEV MIN MAX
trim_26_1354 1890304
848.7 1204. -2591. 498...

1097

By: fitz

07/09/2015 06:15PM

arc/standard star/object comsbination...Started by:haha, 07/10/2015 09:22AM
Hi all,
If there are two different exposures
along two different columns for one
object, one has to process them
independently, and at last combine the
two spectra to remove cosmic rays?

If arc lines are taken independently,
for example, He/Ne/Ar ar...

793

By: haha

07/10/2015 09:22AM

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...

1202

By: ltacconi

07/17/2015 01:09PM

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 ...

953

By: buta

07/20/2015 03:43PM

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...

696

By: jcadien1

07/21/2015 03:32PM

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...

4568

By: Chuck Horst

07/27/2015 03:50AM

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 ...

1582

By: sa14722

08/12/2015 12:54PM

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 ...

628

By: fitz

08/26/2015 04:04PM

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...

1727

By: jsmoker

08/29/2015 09:09AM

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 ...

2191

By: sscibell

09/03/2015 04:51PM

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...

1394

By: fitz

09/03/2015 04:52PM

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...

2056

By: fitz

09/05/2015 10:03PM

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...

1027

By: fitz

09/10/2015 04:23PM

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 ...

1017

By: fitz

09/15/2015 10:42PM

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...

746

By: fitz

09/16/2015 07:53PM

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

676

By: fitz

09/18/2015 11:12PM

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...

1490

By: fitz

09/21/2015 08:13PM

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
...

797

By: joye

09/23/2015 04:43PM

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

700

By: fitz

09/29/2015 05:04PM

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