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Last Post

Understand equations in FXCORStarted by:rohit, 01/28/2009 09:08PM
Problem:

As I am getting extremely weird answers
when calculating RV of known stars, I
decided to manually verify the
calculations FXCOR is doing.

The equations listed in the manual are:

ref_rvobs = catalogue_vel_of_template -
H(temp) # obs. vel....

4678

By: rohit

01/28/2009 09:08PM

Convert spectrum to velocityStarted by:malte, 12/17/2007 01:08PM
I want to transform a spectrum's
wavelength axis to velocity relative to
a specified spectral line.

Splot does this with its command v, but
I'm looking for something a bit more
like scopy. Scopy looks like it might
do the trick, but I'm not clear on...

4650

By: valdes

12/17/2007 01:08PM

DOHYDRA (APSUM) extraction algorithmStarted by:KBWestfall, 08/17/2007 04:40PM
We are in the process of creating error
spectra for fiber data extracted via
dohydra (apsum). The apertures have
been extracted using no weighting
schemes or background subtraction.

Previously, we have created (from first
principles) a pixel-by-pixel ...

4639

By: KBWestfall

08/17/2007 04:40PM

2 images in implotStarted by:cosmologist, 02/24/2011 05:43PM
How can I overplot two images using
implot?

For example with splot I can do on the
graph window:

:o image_name

Is there something similar for implot?

I tried from the implot help page:

o overplot next vector

but is not what I want.....

4637

By: cosmologist

02/24/2011 05:43PM

mscred.mscarith problem reportStarted by:Guest, 03/01/2006 09:20PM
Hello,

There's a typo in mscred.mscarith.cl
which prevents msarith from
running in pyraf.

line# 25 in msarith.cl should be changed
from

int nop1, nop2, nresults, next1,
next2, nexts, n

to

int nop1, nop2, nresult, next1,
next2, nexts, n

The e...

4637

By: fitz

07/09/2016 03:07AM

"logfile" growing out of pr...Started by:Gaba_p, 02/26/2009 08:24PM
Hi,

I'm trying to get a script to work, but
when it gets to the part where "ccdproc"
trims the biassec and performs the
"zerocor", the logfile starts growing
like crazy (it goes up to 4Gbs until
IRAF stops and says it can't open
logfile) while some tem...

4635

By: Gaba_p

02/26/2009 08:24PM

help on STSDAS.ISOPHOTE.ELLIPSEStarted by:Guest, 10/15/2005 07:10PM
Hello, I was wondering if you could tell
me what the units are in the
"mean isophotal intensity" derived from
the ELLIPSE task. I'm trying to
construct a radial profile of HI data,
so magnitude doesn't help much, so
I'm trying to reconstruct a useful pa...

4631

By: Guest

10/15/2005 07:10PM

Help with "prompt" command ...Started by:Gaba_p, 02/23/2009 01:59PM
Hello,

I'm learning how to write scripts, and I
can't get the script below to actually
prompt me for the "image" parameter.
This is the error code I get:

ecl> prueba
ERROR: Attempt to access undefined local
variable `imname'.

"imname = image"...

4624

By: Gaba_p

02/23/2009 01:59PM

Determining radial velocity with IRAFStarted by:valdes, 09/05/2007 08:49PM
[b:5e31dc4ee8]From:
[/b:5e31dc4ee8]"Roberto Madeira"
<rtmadeira@gmail.com
([email]rtmadeira@gmail.com[/email])>[b:5e31dc4ee8]Date:
[/b:5e31dc4ee8]August 30, 2007 1:44:04
PM MST
[b:5e31dc4ee8]To:
[/b:5e31dc4ee8]fvaldes@noao.edu
([email]fvaldes@noao...

4619

By: valdes

09/05/2007 08:49PM

The trace in apallStarted by:cosmologist, 05/24/2011 07:19PM
What does the "trace" part of apall do?

In the manual I am using it says that
the reason one needs to trace is the
fact that the actual spectral line is
not prfectlly parallel to the dispersion
axis. That doesn't make much sense to me
because when I lo...

4617

By: cosmologist

05/24/2011 07:19PM

spectroscopy: does identify weigh lines?Started by:gfuresz, 05/08/2006 01:22PM
Hi,

Can one tell me if the
identify/reidentify tasks weigh the
lines or not? I have found not much
about it in the help.

The IRAF ThAr line list does not have an
"intensity" column, which would tell
what lines have high counts so therefore
more accura...

4608

By: mz79

05/08/2006 01:22PM

Using defpac functionStarted by:figueira, 01/15/2007 12:51PM
Hello!

I'm trying to make my reduction programs
a little bit robust in order to share
them with my team members. I'm starting
to use tasks such as "defpac" in my
scripts and I have a few problems.
Here is my file for "def_test.cl"

def_test.cl:

######...

4607

By: figueira

01/15/2007 12:51PM

another problem with DS9 v5.2 (5.2-2,...Started by:vall, 06/05/2008 08:48AM
Hello,

I have a problem with DS9 v5.2 (on FC9).
When I display an image form IRAF, the
scale menu is no longer disabled (it was
disabled until v5.1), but when I try to
change the image scaling, it takes
forever (and lots of memory and CPU
resources) an...

4581

By: fitz

06/05/2008 08:48AM

Creating those pretty multicolor pict...Started by:jcely, 10/24/2009 04:25AM
Are the "photogenic" multicolored
pictures created in iraf? Or do people
just go to external software like
photoshop or gimp for that?

4574

By: jcely

10/24/2009 04:25AM

ximtool crashing every single timeStarted by:gcardonav, 04/26/2010 10:40PM
Hi Guys:

I am new to iraf. I was able to install
it with out any issues. I am able to
open packages and run iraf, but when I
try to open ximtool, X11 crashes, every
single time. I am not sure if is an
issue with snow leopard or some
configuration I nee...

4563

By: gcardonav

04/26/2010 10:40PM

xc: Command not found.Started by:fsidoli, 05/29/2008 11:06AM
Hi there,

I'm trying to run a program in/outside
of IRAF that use the portable IRAF
compile/link utility, 'xc'. I can see
that I have the xc.e installed on my
system under
'/iraf/iraf/unix/bin.redhat/xc.e' and
that it seems to be listed under the
softo...

4558

By: fsidoli

05/29/2008 11:06AM

Adding in sidereal time to image headersStarted by:massey, 12/31/2008 09:39PM
I'm just back from a Magellan run, and
discovered to my chagrin that my headers
all have a bogus value for the sidereal
time. Everything else is fine,
including the airmass, UT time, date,
etc. I actually discovered this after
running setjd and doslit...

4527

By: AnTaR3s

12/31/2008 09:39PM

specshift, scombine, etcStarted by:esemenko, 04/03/2007 04:48PM
Hello IRAF users!
I have three questions about spectra
processing and related applications.

First question is about tasks which
allow to perform calculation of shift of
two spectra using cross-correlation or
another method. I would like to compare
two ...

4526

By: esemenko

04/03/2007 04:48PM

guiapps segmentation violation on macosxStarted by:sirmarcos, 02/05/2007 07:10PM
Hello,

I tried the pre-compiled binaries of
guiapps for macosx (ppc) today and all
guiapps programs produced a segmentation
violation. So, I then tried to rebuild
them binaries from the source and
several errors occured, and no
x_spectool.e gets creat...

4526

By: sirmarcos

02/05/2007 07:10PM

help on STSDAS.ISOPHOT.ELLIPSEStarted by:Guest, 10/17/2005 03:26PM
From: Ivo Busko <busko@stsci.edu>
Date: Mon, 17 Oct 2005 08:49:14 -0400
X-Mailer: Mozilla 4.78 [en] (Windows NT
5.0; U)
X-Accept-Language: en
MIME-Version: 1.0
To: llevy@physics.unc.edu
Subject: Re: help on
STSDAS.ISOPHOTE.ELLIPSE
References: <...

4525

By: Guest

10/17/2005 03:26PM

read & write in fileStarted by:ranisb, 12/02/2008 11:55AM
Hi,
I am writing following procedure
script.I have 3 science frames and one
masterbias.this script will subtract
biasmaster from each science frame and
change file name "sci_bs_%d.fits and
save in file 'objfile'.
The script is as following;
procedure tr...

4506

By: jturner

12/02/2008 11:55AM

fixpix interpolationStarted by:pweilbacher, 08/02/2006 04:12PM
I know this had worked for me in the
past when doing MOSAIC reductions but
with my current data I cannot get fixpix
to interpolate my data well across bad
pixels.

I have lots of saturated stars in the
field, for some reason, some of the
saturated pixel...

4493

By: pweilbacher

08/02/2006 04:12PM

mscred - ccdproc bpmasksStarted by:jgallag3, 03/20/2006 06:17PM
Hello,
I am havingtrouble combining my bias
exposures using zerocombine/ccdproc
within the mscredpackage. I am using
IRAF v2.12.2a and the latest version of
mscred (I think).The data was taken on
the kpno 0.9-m with the mosaic imager.
I am getting the ...

4491

By: fitz

03/20/2006 06:17PM

normalize data using continuum taskStarted by:, 04/16/2009 02:54PM
Hello all,

I have a couple of spectra with very low
counts in the low wavelength region. I
normalize using continuum task in the
specred package. In the normalized
spectra, the parts with low counts
appear exaggerated (oscillate wildly)
wrt the rest. M...

4472

By:

04/16/2009 02:54PM

tfinder issuesStarted by:JoshH, 02/25/2006 04:17AM
Hello,
I was hoping someone could help me
with my tfinder problems. I have
installed tfinder and tables..
everything seemed to go smoothly during
that process. However, now I'm at the
point where I'd like to try to get a
plate solutiong and the tfi...

4472

By:

02/25/2006 04:17AM

geomap/geotranStarted by:dbrenner, 04/25/2007 03:43PM
I made a blank 512 x 512 image. I added
four psf's near the corners.

Using default settings, I used imshift
to shift the psf's by 0.5 pixels in x
and y.
The psf structure was preserved but
daofind told me I shifted the psf's
0.553 pixels.

I then used...

4463

By: dbrenner

04/25/2007 03:43PM

Memory problems in mscred.combineStarted by:dougmink, 02/07/2006 03:47PM
We have just updated our pipeline
computers from 2.12 to 2.12.2a and
are running out of memory when combining
images which are scaled
or combined with anything but a sum or
run in any reject mode. Is there
a buffer size parameter the default
value of w...

4445

By: valdes

02/07/2006 03:47PM

Problems with 24-bit Ximtool?Started by:emma, 12/17/2008 09:26PM
Hi there,

I've found a few features which used to
work on the old version of ximtool that
don't appear to work on my installation
of the 24-bit version...I'm hoping
someone else has had these problems
too...

1) Keyboard shortcuts to move through
frame...

4443

By: jturner

12/17/2008 09:26PM

geomap surface2 coefficientsStarted by:footstyle, 09/29/2006 11:36PM
What do the coefficients of surface2 in
the *.db file produced by geomap
actually mean or act upon? I have
trawled through pyraf's documentation
and iraf.net questions to find
information about this, but have been
unable to reproduce the behaviour
sugge...

4438

By: footstyle

09/29/2006 11:36PM

find wcs when pointing unknownStarted by:jim, 06/03/2006 08:04PM
Is there any IRAF task(or non-IRAF for
that matter) that will take an image
with no wcs header info and locate the
sky postion and produce a wcs? I know
the position to about +/- 10 deg in each
axis.

Thanks,
Jim

4412

By: jim

06/03/2006 08:04PM

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