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Last Post

problem with imshiftStarted by:taylor, 07/21/2017 12:22AM
Hi all,

I have troubles after running imshift on
my images. I shift my images using a
file containing shifts and I have tried
different options for the parameter
"interp". Then I compare the initial and
the shifted image. The count value on
differen...

832

By: taylor

07/21/2017 12:22AM

broken imdelete Started by:kanaan, 06/19/2016 03:34PM
hi Guys,

I am sure this must be really stupid, I
have been fighting this since yesterday
though.

I cannot imdelete files in my system. I
was just using !rm instead, but within
mscred some of the scripts run imdelete
then I cannot circumvent the ...

833

By: kanaan

06/20/2016 12:00PM

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...

836

By: ambrosc

06/05/2018 01:01PM

CanStarted by:massey, 03/09/2019 10:45PM
Hi Mike et al---

I've come across about dozen ancient
IRAF images (IIDS data) that are still
in the "imh" and "pixels" form. The
weird thing is that although I can see
them find with an ls, imhead says it
can't open the file. I could understand
it ...

837

By: fitz

03/11/2019 02:10AM

SAOImageDS9 version 8.0rc6 is now ava...Started by:joye, 10/22/2018 03:37PM
SAOImageDS9 version 8.0rc6 is now
available for download. Please use this
version or version 7.5 with IRAF.

http://ds9.si.edu/site/Beta.html

845

By: joye

10/22/2018 03:37PM

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...

848

By: valdes

04/25/2017 09:39PM

iraf online task helpStarted by:harvester, 10/12/2016 03:12PM
hello, just wanted to ask about iraf
online help (html formatted). they
disappeared from both websites
iraf.noao.edu and iraf.net at some point
and i found them very useful, because of
their much better readability than
classic help and xhelp. is it pea...

857

By: harvester

10/12/2016 04:53PM

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

Can't add headers to file using heditStarted by:e.longstaff, 09/10/2018 05:43PM
When I type this,

imutil> hedit myfile.fits
CUNIT1="Angstrom" add+ addonly+

I get this error,

ERROR: parameter `CUNIT1' not found

I've so far got around it by epar hedit
and setting add and addonly to yes but
this isn't a permanent solution....

875

By: fitz

09/10/2018 06:07PM

MSCSETWCSStarted by:dopitz, 05/26/2016 07:05AM
Hello

I am trying to apply a WCS Database
(created by someone else) to other
exposures. I am doing:

mscred

for(i=1;i

881

By: dopitz

05/26/2016 07:05AM

data typesStarted by:CosmicLettuce, 10/27/2014 12:49PM
I have a FITS file with the following
header segment:

% less section.fits
SIMPLE = T / file
does conform to FITS standard

BITPIX = 16 / Number
of bits per data pixel

NAXIS = ...

882

By: fitz

10/27/2014 03:34PM

questions about findgainStarted by:oliver, 03/21/2014 08:17PM
Hi,

I used to use IRAF for reduction but
didn't use it for a long time. I have
noticed that the findgain task is moved
into obsutil package. Does this mean
that there is another task, doing
similar thing like findgain, which is
not obsolete?

*help...

886

By: oliver

03/22/2014 09:41AM

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

buying a mac laptopStarted by:duvall, 02/20/2014 08:58PM
I'm thinking of buying a mac laptop that
I would use to run iraf. Are there
minimum memory requirements to run iraf?
What works comfortably? Macbook Air or
Pro?
Thanks.
Tom

895

By: fitz

02/20/2014 09:04PM

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...

906

By: fitz

12/08/2016 04:23PM

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...

926

By: DamianJC

06/26/2015 06:43AM

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...

934

By: fitz

10/21/2015 04:18PM

SAOImageDS9 7.6b1 is now availableStarted by:joye, 05/16/2017 08:02PM
SAOImage DS9 7.6b1 is available at
http://ds9.si.edu/site/Beta.html.

Now available, the all new Windows 64bit
and 32bit ports of DS9. Supports IIS,
threads, RGB, 3D. Fully functionality
with all other platforms.

937

By: joye

05/16/2017 08:02PM

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:
...

940

By: fitz

06/30/2015 05:47PM

ccdproc not editing parameters in bet...Started by:tasso1db, 07/28/2016 04:10PM
Hello,

I'm trying to make a script that
automates my reduction process for ccd
images. However in my script ccdproc
doesn't seem to want to change my
parameters in between the steps. For
instance after the first step where the
bias is made, I want th...

941

By: tasso1db

07/28/2016 04:10PM

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

Max file sizeStarted by:CosmicLettuce, 10/04/2014 06:58PM
I have a ~2.6GB fits file with
extensions, and I'm getting a 'Cannot
open file' error message when I try to
do something as simple as imhe. Is this
file too large?

Thanks as usual --- Cosmic

962

By: fitz

10/06/2014 03:43AM

Imalign will not shift imagesStarted by:riley, 07/25/2018 05:52PM
Hi, I'm running pyRAF 2.1.15 with DS9
7.6, on Ubuntu 18.04. I'm trying to use
imalign, and it refuses to shift my
image. The command executes, but it just
outputs the image as it was before.
Here's my lpar:
[code] input = "image1.fits" Input
images ...

967

By: fitz

08/01/2018 06:25PM

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...

967

By: fitz

10/21/2015 05:10PM

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? ...

978

By: fitz

09/15/2016 05:41PM

canStarted by:giannicatanzaro, 05/07/2019 07:22AM
hi all
I cannot read with iraf FTS files
download from AAT archive, even if I
rename them in .fits.
Typical error I get is
ecl> splot RUN0002.fits
ERROR: MWCS: dimension mismatch
(mw_open)

or when I use imheader
ecl> imheader RUN0002
RUN0002...

979

By: giannicatanzaro

05/07/2019 07:22AM

Garbage output when using imexamStarted by:EmilyDick, 02/10/2015 11:05PM
Hello,

I am using Cygwin on a Windows 8.1 to
run iraf and ds9. I used this tutorial
for the download:
http://www.iac.es/sieinvens/siepedia/pmwiki.php?n=HOWTOs.IrafCygwin

I am having trouble when using imexam on
an opened image on ds9. There is garb...

991

By: fitz

02/10/2015 11:11PM

Errors in 2.16.1?Started by:jeanm12, 11/21/2013 11:24PM
Hello,

To start with, my computer is a 64-bit
machine running CentOS 6. I have been
doing some echelle data reduction and
ran across a few things that might be
bugs or errors.

Running IRAF 2.16 with IRAFARCH=linux:
- I found that ecreidentify did...

997

By: fitz

11/22/2013 02:13AM

script cl issueStarted by:Chuck Horst, 01/05/2012 08:37AM
I am looking for a way to test if a file
is empty or not in a script. I see
access to see if a file exists. What
would be a good way to tell if it is
empty. The returned value would be used
to test.

Thanks...chuck

997

By: fitz

01/05/2012 08:37AM

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

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