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Is there a task?Started by:dbrenner, 10/01/2009 06:33PM
I have a two dimensional image; it is 3
pixels x 25 pixels. I want to decompose
it into a sum of 23, overlapping, known
3x3 images. Or conversely, I want to
combine 23 3x3 images to make a specific
3x25 image. Is there a task, maybe in a
spectral pac...

1476

By: dbrenner

10/01/2009 06:33PM

photcal fitparams fitting problemsStarted by:sochuwing, 09/27/2009 06:56AM
Hi all,
I have a question on
[i:65521dda10]fitparams[/i:65521dda10]
task in
[i:65521dda10]photcal[/i:65521dda10]
package.
I am doing BVR CCD photometry on Landolt
standard fields. I carried out aperture
photometry using
[i:65521dda10]phot[/i:65521dda10...

1690

By: sochuwing

09/27/2009 06:56AM

Doppler correction of double-lined sp...Started by:delta_kuadrant, 09/20/2009 09:44PM
Hi again,

I have a spectra (echelle) that has a
double-line features.
how i apply a doppler correction for
each components using dopcor?
do I have to do correction for each
radial velocities (primary and
secondary) and then co-added the
results?
any su...

1536

By: delta_kuadrant

09/20/2009 09:44PM

Multidrizzle problem: 'Unrecognized k...Started by:harry93, 08/13/2009 02:34PM
Hello,

I am trying to run some WFPC2 data
through multidrizzle but keep getting a
fatal error - Unrecognized key:
proc_unit

proc_unit is one of the hidden
parameters in multidrizzle and there are
only two choices: native (which for
WFPC2 is DN I think...

1626

By: harry93

08/13/2009 02:34PM

PSF Subtraction in DAOPHOTStarted by:josephmeiring, 07/29/2009 09:11PM
Hello,

I'm working on some PSF subtractions
with DAOPHOT, and have seen that when
ever I run PSF and interactively
subtract the PSF from a star in the
image (with 's' during the PSF routine),
it seems to work fairly well. When I run
substar howeve...

2545

By: josephmeiring

07/29/2009 09:11PM

Problem running DS9 from CygwinStarted by:KB, 07/23/2009 08:28AM
Hi,

I installed IRAF in Cygwin, but I cannot
start ds9 from the Cygwin-prompt (it
runs ok from Windows). I followed the
recipe from SIEpedia HOWTOs_IrafCygwin.
When I start ds9 from the Cygwin-prompt
I get an error-message with heading:
"Application in...

2261

By: KB

07/23/2009 08:28AM

Problem with apphotStarted by:Guest, 07/17/2009 11:34AM
Sir,
I got some problem in reducing the data
with package apphot. I have been trying
to use both qphot and phot task within
apphot but some warning message came
like below----
[b:a17f269814]Warning: Graphics overlay
not available for display device.[/...

1482

By: Guest

07/17/2009 11:34AM

mkapfile outputStarted by:cody, 07/13/2009 11:30PM
I have a list of 1990 stars that I've
run phot on, and now I need to do
aperture corrections. Not all these
stars are suitable for aperture
photometry, due to mild crowding, bad
pixels, etc. But I don't cull the list
since I want the photometry to be as...

1597

By: cody

07/13/2009 11:30PM

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

How to get splot to overplot in same ...Started by:, 03/07/2009 04:59AM
Hello,
After combining 3 spectra I want to
overplot the result with the original
spectra. First I splot the combined
spectra:
[code:1:4584fd22a6]
echelle> splot m13b_ecw 1
[/code:1:4584fd22a6]
I look at other apertures by using the
‘(‘ and ‘)�...

3954

By:

03/07/2009 04:59AM

question about IRAF headersStarted by:bwilking, 02/12/2009 10:04PM
Hi

I have written a script to analyse
spectra which uses CRVAL1, CRPIX1, and
CD1_1. The spectra reside in a
multispec file and these parameters are
not currently set in the header. When
I add them to the header using hedit, I
can no longer sp...

1621

By: bwilking

02/12/2009 10:04PM

Dark corrections and ccdprocStarted by:Guest, 01/21/2009 04:51PM

I have several light images taken at
different exposure times. I would like
to simplify my life and take only one
set of long exposure dark images and
scale them to the different light image
exposure times. When imaging lights, I
also take a set of...

1737

By: Guest

01/21/2009 04:51PM

Atomic Data in the nebular packageStarted by:shaw, 08/25/2008 04:51PM
A user recently posed some questions
about the STSDAS.nebular package:

[i:6d2f5cad78]Dear Sir,

I am currently working on the planetary
nebular density and temperature
diagnostics for our reseach objects. And
I am checking some IRAF nebular
routines, e...

2170

By: shaw

08/25/2008 04:51PM

make an empirical psf in IRAF/DAOPHOT?Started by:ameisner, 07/15/2008 01:23AM
I know that the DAOPHOT psf function is
intended to make a psf consisting of an
analytic fit + one or more look up
tables...however, for my purposes the
fitting functions I've tried
(gauss,moffat) give a psf that is too
sharply spiked in the center and ...

2984

By: ameisner

07/15/2008 01:23AM

craverage and FITS plio masksStarted by:mo, 04/03/2008 09:37PM
Hi Folks,
We've been making good use of
the FITS storage for pl masks.
But we've stumbled with the "craverage"
task. (This is still under
IRAF 2.12 for redhat).
We've add the "fpl" extension to
the fxf in the imextn symbol.
As I underst...

2231

By: mo

04/03/2008 09:37PM

problems with spectool on mac intel m...Started by:mortena, 11/30/2007 07:49PM
Dear helpdesk,
I appear to have a problem with spectool
on intel macs. The error
occurs in spectra with errors included.
The spectrum without errors
reads in fine but when errors are
included, a division by zero error
occurs.
This appears to be s...

2582

By: mortena

11/30/2007 07:49PM

Fwd: splot "%" keystrokeStarted by:fitz, 09/12/2007 05:23AM
[color=red:72c1728645] [Mod Note: This
was submitted as a story and is
re-posted here] [/color:72c1728645]

Dear All,

This problem concerns the "%" key in
splot to display a different band of a
3D image. When parameters line and band
are given on comm...

2900

By: fitz

09/12/2007 05:23AM

another push, please...Started by:Michael, 09/12/2007 12:33AM
Sumner, New Zealand

2007 September 12

IRAF Support
iraf@noao.edu

Dear Sir:

Thank you for your reply to my request
of September 10, suggesting that I
examine the Systems
or Applications forum at IRAF.net for
answ...

3007

By: Michael

09/12/2007 12:33AM

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

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

apflatten with varying fit parameters...Started by:dr.michi, 05/16/2007 12:19PM
I noticed that on our flat fields it
would be nice to have a lower order fit
in one part of the spectrum (the
fringe-plagued red part), while on the
rest a higher order would be nice.

Is there any way I can do this in an
automated manner?

Michael

2887

By: dr.michi

05/16/2007 12:19PM

DISPTRANS gives EXTVER error (fwd)Started by:fitz, 12/21/2006 03:44PM
[quote:8e34bbd706]
My question concerned disptrans.

PACKAGE = onedspec
TASK = disptrans

input = test0082 Input
spectra
output = vdim0082 Output
spectra
units = km/s 2.12125 micron Output
dispersion units
(error = ...

3020

By: fitz

12/21/2006 03:44PM

Building gemini pkg & deps with U...Started by:jturner, 11/27/2006 03:32AM
Following some initial difficulties
under 2.12.2a, I thought I'd mention
that I was able to compile the Gemini
IRAF package and all of its dependencies
under IRAF 2.13 beta 2 on Ubuntu 6.06
with no problems (note that gemini
currently still recommends u...

2886

By: jturner

11/27/2006 03:32AM

Task telluric and renormalizationStarted by:Acrobat, 11/25/2006 11:09PM
Hi,

I am using the telluric task distributed
with IRAF and I am having a difficulty.

Everything seems to work ok, but I
obtain a corrected spectrum which is
renormalized at about 0.975 instead of
1. I'm using normalized spectra as
inputs.

What am I...

2995

By: Acrobat

11/25/2006 11:09PM

Solution for dispcor having no effectStarted by:LMCBoy, 11/22/2006 10:05PM
Hello,

Just wanted to post a non-obvious
solution to a dispcor problem I had
recently. I was having trouble gettijng
dispcor to do anything to my spectra.
It would run without error, and set the
DCLOG keyword properly, but would not
apply any wavelen...

3102

By: LMCBoy

11/22/2006 10:05PM

adding two spectra in SPLOTStarted by:valdes, 10/27/2006 04:55PM
Date: Fri, 27 Oct 2006 10:38:14 -0400
(EDT)
From: Hermine Landt
<hlandt@head.cfa.harvard.edu
([email]hlandt@head.cfa.harvard.edu[/email])>
To: Mike Fitzpatrick
<fitz@tucana.tuc.noao.edu
([email]fitz@tucana.tuc.noao.edu[/email])>
Subject: Re:...

3222

By: valdes

10/27/2006 04:55PM

DIFIMPHOT again.Started by:mairan, 08/28/2006 02:53PM
Hi.

I'd like to know whether someone knows
how to use the DIFIMPHOT package.

Cheers,
Mairan Teodoro

2686

By: mairan

08/28/2006 02:53PM

question about astrometry and finderStarted by:Guest, 07/01/2006 12:42AM
Hi Deidre,
[quote:33afddf059]If I have a plate
solution from an astrometry program
outside of IRAF, is there some way to
put this info into the header of an
image so that I can have RA,DEC readout
in ximtool? Phil gave me an astrometry
fortran program a...

2343

By: Guest

07/01/2006 12:42AM

finder/tfinder questionStarted by:Guest, 06/28/2006 02:53AM
Hi Phil,

> But, here's my question for you.
There are LOTS of USNOB stars on
> the frame, and I can easily
generate
> a coordinate list
> 19:12:12.321 +12:12:12.03
> 19:12.13.123 +12:10:12.23
> etc
> of stars that should be on o...

2366

By: Guest

06/28/2006 02:53AM

Fringe removal in red partStarted by:valdes, 05/30/2006 05:30PM
[b:aed5a995d4]From:
[/b:aed5a995d4]Ranjan Gupta
<rag@iucaa.ernet.in
([email]rag@iucaa.ernet.in[/email])>
[b:aed5a995d4]Date: [/b:aed5a995d4]May
27, 2006 10:52:23 PM MST
[b:aed5a995d4]To: [/b:aed5a995d4]"Frank
F. Valdes" <valdes@noao.edu
([email...

3359

By: valdes

05/30/2006 05:30PM

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