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Last Post

msczero/mscred fails to open fileStarted by:rmich, 12/19/2013 02:10AM
I am having a confusing issue with
msczero. I am running IRAF 2.16.1 EXPORT
on 64-bit Linux. Typically, when I run
it, the image appears correctly in ds9,
and then as soon as I hit 'm' it fails.
I can try resetting it, and it then
fails immediately (w/o...

1243

By: rmich

12/19/2013 02:41AM

The 'flux' parameter in 'transform' taskStarted by:Kimmo, 06/21/2011 09:39AM
Hi

I am using the 'transform' procedure to
correct the wavelength-curvature of
longslit spectra.
The procedure has the parameter 'flux',
which is used to control the
conservation of flux per pixel.

Our measurements are so that we are
measuring scat...

1243

By: valdes

06/21/2011 09:39AM

questions about xccdred's packageStarted by:Guest, 11/16/2008 11:44PM
Please i need useful tips for install
some packages for IRAF, in specific for
xccdred's package.
It's for Ubuntu distribution.

thanks

Elias Pizarro Rodriguez
Student of Astronomy
University of Concepcion, Chile

1243

By: fitz

11/16/2008 11:44PM

dispcorStarted by:adnan, 09/02/2014 11:02AM
Hi,
I'm having problem using the 'dispcor'
function on iraf.
I have installed the latest ximtool and
iraf version on a 64-bit Linux OS.

When I type 'dispcor' in an xgterm
window, it asks me give the Input and
Output spectra list. When I enter both
...

1244

By: adnan

09/15/2014 04:00PM

error while running task imalignStarted by:clau_agl, 03/10/2014 04:27PM
Hello,

I installed IRAF v2161 in my OS Ubuntu
13.10 64bit machine. When I try to run
the task "imalign" I get this ERROR:
Pixel subscript out of bounds
(v2010.fits) "verbose=verbose, >&
tmpfile)" line 33: inmatch$align.cl
called as: imalign (mod...

1244

By: clau_agl

03/10/2014 08:53PM

wavelength and flux calibration files...Started by:haha, 11/27/2013 10:04AM
about wavelength calibration
Which arc files should I use?
There are no FORS2 calibration
files at http://www.eso.org/pipelines/.
However I tried FORS's files but
only found,say,

F2_GMDT_090210A_G300I_OG590_Norma.fits
is a 6x10 mat...

1244

By: haha

11/27/2013 10:04AM

sptimeStarted by:astropunkin, 06/25/2010 02:36PM
I am trying to use the sptime task to
determine the exposure time for a fiber
bundle if used on the SOAR telescope in
Chile. I have made up the relevant text
files for specpars but when I try to run
sptime I just get the following
uninformative error

...

1245

By: astropunkin

06/25/2010 02:36PM

temden not working for C III 1906,1909Started by:janerigby, 08/12/2010 09:40PM
Can anyone tell me how to get
stsdas.analysis.nebular.temden to
compute densities from the C III ratio?
It's working fine for the [O II] and [S
II] doublets. But for C III, I get
"Density calculation failed". Key pars
below. Thanks in advance for adv...

1251

By: fitz

08/12/2010 09:40PM

Problems with the daofind taskStarted by:chloe, 05/03/2010 08:32PM
Hi,

I've got some problems with the daofind
task.
When I try to run it with the daophot
package, I have an error message like
"Error, floating point divide by zero".

But when I run daofind with the apphot
package (same parameters), It runs
perfectly. ...

1259

By: fitz

05/03/2010 08:32PM

question fxextractStarted by:Guest, 11/13/2008 02:43PM
Dear madam / sir,

I have a question related to the IRAF
task fxextract:

I would like to extract an extension
(e.g. extension 2)
from a multi-extension fits file and
pass the header (=extension 0) to the
new file,
or, at least, pass all the...

1271

By: fitz

11/13/2008 02:43PM

how apall estimate the errors/sigmas?Started by:pascale, 04/22/2011 08:41PM
Dear all,

I would like to know, with details, how
apall estimate the errors it is
providing as the 4th extension of the
output spectrum.

Thank you for your help,

Pascale

1273

By: pascale

04/22/2011 08:41PM

aprecenterStarted by:caldwell, 02/14/2014 09:32PM
Hi,
I'm having troubles with an existing
script, and have tracked it down to
using aprecenter on some multifiber
spectra. I have a reference aperture,
called apref_DOME_2x3, and an image
which has been run through
apall once, called DOME. The ide...

1275

By: caldwell

02/19/2014 03:50PM

Mosaicing Direct ImagesStarted by:ahkoeppel, 07/31/2014 07:12PM
Hey there,

I am working with image exposures made
up of 8 CCD frames and I have been
trying to create a master image from
several exposures in shifted regions
(which each have eight frames).

I was able to stack the images with
mscstack, but the ta...

1279

By: valdes

08/01/2014 04:27PM

Phot/datapars/photpars etc.Started by:khl, 06/28/2010 07:00PM
Hi,

I'm currently looking at an image whose
units are in counts/sec. When I run the
task PHOT, it tells me that the
magnitude of the source is ~32nd
magnitude. This is understandable
because the units of the image is
counts/sec and that number very s...

1282

By: khl

06/28/2010 07:00PM

fortran iraf on mac os x 10.6.6Started by:vmagalhaes, 01/28/2011 12:53PM
I`m having a problem on running a imfort
based task, on iraf
when the program calls clnargs it stops
whitout any error flag.

does anyone knows how to solve this
problem?

1286

By: fitz

01/28/2011 12:53PM

how well does geotran preserve the fl...Started by:rdcschan, 01/21/2011 07:52AM
Dear Iraf experts,

Hi, I am trying to compare the flux
levels of two images of a galaxy taking
with different instruments (WIYN and
HST), that's why I need to transform one
image to align with another one. I
already considered fllter responses and
t...

1286

By: fitz

01/21/2011 07:52AM

how to interpolate a spectrum from an...Started by:paulartcoelho, 10/24/2016 06:08PM
I've been using sinterp and rspectext to
convert a spectrum in ascii format into
a fits one for more time that i care to
remember. Lately, several times I wanted
the output FITS file to have a
log-linear instead of linear wavelength
dispersion. As far a...

1287

By: fitz

11/14/2016 05:54PM

pstselect ERROR: segmentation violationStarted by:ping, 11/19/2012 11:31PM
Hello,

I posted the following question last
year but still haven't gotten any
answer.
I would really appreciate if someone can
tell me a solution to this.

Thanks,

Ping
---------------------------------------------

I saw this old post:

> we seem ...

1288

By: fitz

11/19/2012 11:31PM

Problem with graphicsStarted by:darbelaez, 11/23/2017 10:24PM
Hi,

I recently upgraded my system to ubuntu
16.04 64-bit and installed iraf. The
problem is that when I make a plot, the
graphic is completely illegible, it does
not show the usual green window and the
black background, but a gray background.
I tried...

1299

By: fitz

11/27/2017 05:39PM

nproto.objmasks - segmentation violationStarted by:claudiarodrigues, 08/07/2015 07:46PM
Dear,

I am getting a segmentation violation
when running objmasks. See below.

nproto> objmasks
List of images or MEF files (teste):
List of output object masks (omt):
ACE: NOAO/IRAF V2.16.1
claudia@halley.das.inpe.br Fri 14:27:20
07-Aug-2015 ...

1299

By: claudiarodrigues

08/20/2015 09:00PM

SPLOT overwrite problemStarted by:mafsar, 05/18/2016 08:15PM
Hi,
I have a problem with SPLOT task. When I
tried to do some work using splot I
realized
something has changed. I used splot's
continuum normalization
option for an echelle spectrum. When I
wanted to overwrite the changes that I
made in each order ...

1303

By: valdes

05/27/2016 06:25PM

fc does not produce executable fileStarted by:weistrop, 09/24/2013 07:46PM
I'm running IRAF 2.16 on a MacBook Pro,
OS X 10.7.3 and have downloaded fortran.
I'm trying to get an executable for a
program called trans in file trans.f.
When I type fc trans.f I get

ttools> fc trans.f
trans.f:
MAIN trans:
gcc: error trying...

1303

By: weistrop

10/10/2013 09:28PM

Error for apallStarted by:cosmologist, 08/26/2010 10:07PM
when I run apall on my data I get the
error:

[code:1:360cb055f8]
Warning: No sample points for fit
Warning: No sample points for fit
Warning: No sample points for fit
[/code:1:360cb055f8]

What might the reason be?

Thanks

1303

By: cosmologist

08/26/2010 10:07PM

Problems running ngaussfitStarted by:Francesca, 10/01/2014 01:37PM
Hi,

I am trying to run the task ngaussfit on
my mac osx 10.8.5 but it seems not to
work. After I launch the task,
I can see the the spectrum on the
graphic window (together with a
tentative fit below).
However, if I try to change the graph
window ...

1310

By: fitz

10/06/2014 02:55PM

imcombine result questionStarted by:Guest, 06/05/2009 02:02PM
When processing a time series of a slow
moving (angular) asteroid, the resulting
median combine image
shows a trail over the path of the
asteroid.

Can someone confirm this as expected and
desired behavior (in principle) where
the tails of the psf for ...

1312

By: Guest

06/05/2009 02:02PM

Optimal vs non-optimal extraction for...Started by:galtavi, 02/28/2013 09:49AM
Dear IRAF users, I would like to ask
your opinion about this "problem" I
found with the optimal extraction of
spectra contaminated by second order
that may be of general interest.
I want to extract all the flux, also the
contaminating one, because I'll...

1314

By: galtavi

02/28/2013 09:49AM

Request for more splot input validati...Started by:Jason Quinn, 02/15/2011 02:55PM
Splot seems to do only very weak
validation of input for the "line" and
"band" parameters. In particular, the
user can enter values that far exceed
the actual upper limit for line or band
for a given image. Could this be
improved? Is there a reason why ...

1315

By: valdes

02/15/2011 02:55PM

How to divide a WFPC3 bad pixel mask ...Started by:Santiago, 03/20/2014 01:16PM
I have this problem, i'm processing some
WFPC3 with xzap extern package but i'm
doing it such a way the task is applied
in layer [1] which contains 1 half of
the detector and then another run with
the [4] extension which contains the
other half of the d...

1316

By: fitz

03/25/2014 03:47AM

is it possible to adjust the intensit...Started by:china_108, 07/10/2011 03:58PM
I generated a psf using the psf task and
I need to adjust its intensity to apply
it to an over-exposed star. Is it
possible to do it in iraf?

1320

By: valdes

07/10/2011 03:58PM

imcombineStarted by:dbrenner, 06/23/2010 05:34PM
How do I translate the cl command
imcombine *SR*.fits sum.fits

to a command in a script?

thanks.

1322

By: dbrenner

06/23/2010 05:34PM

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