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helplog.37: colbias, ccdproc, fit1d, ...Started by:Guest, 11/14/2005 09:15PM
NUMBER: 37
KEYWORDS: colbias, ccdproc, fit1d,
prescan, overscan
DATE: Mon Nov 14 14:13:04 MST 2005
FROM: valdes

Q: I have a question concerning the
colbias command in the noao.bias
package of IRAF. I am working with a
telescope which uses columns
1-4...

3735

By: Guest

11/14/2005 09:15PM

multiple columns for biasStarted by:valdes, 11/14/2005 09:12PM
Hello Yan,

It is not common to use both the prescan
and overscan columns at the
same time. The standard IRAF tasks for
handling bias (colbias and
ccdproc) do not allow use of more than
one contiguous region for
bias. However, if you wish to do ...

2824

By: valdes

11/14/2005 09:12PM

Fwd: ellipticity and position angleStarted by:valdes, 11/14/2005 08:31PM
[b:30bd99962a]From:
[/b:30bd99962a]Philip Massey
<massey@lowell.edu
([email]massey@lowell.edu[/email])>
[b:30bd99962a]Date:
[/b:30bd99962a]November 14, 2005 1:02:07
PM MST
[b:30bd99962a]To: [/b:30bd99962a]Frank
Valdes <valdes@noao.edu ([email]v...

2814

By: valdes

11/14/2005 08:31PM

ellipticity and position angleStarted by:valdes, 11/14/2005 07:53PM
Hi Phil,
Unless you want me to put together a
reply on IMEXAM I suggest you look at
the task PSFMEASURE. In the current
version of IRAF it is part of the
OBSUTIL package. To do the
non-interactive job you want you would
make a text file of x/y for a...

3065

By: valdes

11/14/2005 07:53PM

Fwd: xdimsum.makemask: duplicate keyw...Started by:valdes, 11/14/2005 07:40PM
[b:3ea45658ab]From:
[/b:3ea45658ab]Sergio Gelato
<Sergio.Gelato@astro.su.se
([email]sergio.gelato@astro.su.se[/email])>
[b:3ea45658ab]Date:
[/b:3ea45658ab]November 5, 2005 5:02:37
AM MST
[b:3ea45658ab]To: [/b:3ea45658ab]Frank
Valdes <valdes@noa...

2998

By: valdes

11/14/2005 07:40PM

problem with ccdprocStarted by:Guest, 11/13/2005 05:24AM
I'm having trouble with the background
correction in ccdproc. I have
created an average zero image called
Zero.fits, which looks fine. But
when I process my objects with ccdproc,
the routine is processing
Zero.fits for the background correction,
and i...

2669

By: Guest

11/13/2005 05:24AM

a problem about the photStarted by:Guest, 11/12/2005 03:04PM
Dear Sir,

I have a problem about the output mag.
values of the digiphotx package.

Recently, I always get the mag. values
larger than before in both apphot and
daophot packages. The zero point is the
same before and now.
I set the parameter...

2713

By: Guest

11/12/2005 03:04PM

2754

By: Guest

11/12/2005 04:37AM

imexamine error (fwd)Started by:Guest, 11/12/2005 04:22AM
---------- Forwarded message ----------
Date: Sat, 29 Oct 2005 15:43:36 -0700
(PDT)
To: Mike Fitzpatrick
<fitz@tucana.tuc.noao.edu>
Subject: Re: imexamine error

Hi Mike,
thanks for your reply. Here is exactly
what
I am doing:

I open ds9 from a ...

2818

By: Guest

11/12/2005 04:22AM

problem with DOECSLIT/ECREIDENTStarted by:Guest, 11/11/2005 12:03AM
I find that when trying to extract
echelle spectra with dispersion
correction using arcs taken at periodic
intervals during the night,
the rms of the residuals to the
comparison line fitting are much
larger (~300 times for this case) for
the arc after ...

2697

By: Guest

11/11/2005 12:03AM

mscred/zerocombine problemStarted by:Guest, 11/10/2005 05:01PM
Dear Iraf Gurus,

I'm running into a problem in the
mscred package. I'm trying to
run the zerocombine task to stack a set
of bias frames in MEF format,
and am getting the error message:

ERROR on line 46: parameter 'plfile'
not found.

First I tr...

2813

By: Guest

11/10/2005 05:01PM

multiple columns for biasStarted by:Guest, 11/09/2005 01:37PM
Dear IRAF crew,

I have a question concerning the colbias
command in the noao.bias
package of IRAF. I am working with a
telescope which uses columns 1-48
and 2096-2158 as overscan regions. The
bias is found by the colbias
command. I was wondering if ...

3002

By:

11/09/2005 01:37PM

Problems in IrafStarted by:Guest, 11/09/2005 02:17AM
Dear sir,
Hope you still remember me.As usual, I
have a few
questions of iraf to ask.
1. After extracting the spectrum to 1-D
the imagefile
supposed had an extension of .ms, right?
Now the
problem is the imagefile still in 3-D
format,because
the header ...

2448

By: Guest

11/09/2005 02:17AM

problems with GUIAPPSStarted by:Guest, 11/07/2005 08:14PM
Hi;
I have recently installed GUIAPPS on
my Linux machine (64 bit dual Opteron
processor, running Fedora Core 2), and I
am having some difficulties with both
xgphot and xguiphot (I need elliptical
apertures, and those seem to be the
tasks
that allow ...

3547

By:

11/07/2005 08:14PM

ellipticity and position angleStarted by:Guest, 11/07/2005 04:36PM
I have a (long) list of x and y
positions of stars in an image, and
would very much like to know the
ellipticity and position angles of the
images: most are stars, but a
few are spurious detections on
defraction spikes.

I know that imexamine's "a" ...

3149

By:

11/07/2005 04:36PM

mosaic2Started by:Guest, 11/04/2005 08:34PM
Hola Liliana,

Yes you may go ahead with the reductions
without adding the cosmic
rays to the bad pixel mask.

It was not clear what your problem is
with crplusbpmask.cl. Could
you not download the script,
could you not define the script, or when
y...

2441

By: Guest

11/04/2005 08:34PM

Fwd: sine wave baseline removalStarted by:Guest, 11/04/2005 08:25PM
[b:44e995dd1f]From:
[/b:44e995dd1f]"Phil"
<philbru@earthlink.net
([email]philbru@earthlink.net[/email])>
[b:44e995dd1f]Date:
[/b:44e995dd1f]November 2, 2005 12:15:13
PM MST
[b:44e995dd1f]To: [/b:44e995dd1f]"Frank
Valdes" <valdes@tucana.tuc.noao...

3018

By: Guest

11/04/2005 08:25PM

xdimsum.makemask: duplicate keyword a...Started by:Guest, 11/04/2005 07:55PM
Hello Sergio,

Yes the duplicate use of zloreject at
line 198 is an error. How it
affects PyRAF and if that is the actual
source of the error you would
have to ask the developers of PyRAF (at
help@stsci.edu). XDIMSUM was
not developed with regar...

2773

By: Guest

11/04/2005 07:55PM

software problemStarted by:Guest, 11/04/2005 07:47PM
Hello Claudia,

The situation gets a little confused
because of different versions of
XImtool and DS9 that people use. The
cursor readback depends on
certain behaviors of the display
servers. It is likely you are using
DS9 which does not correct...

4092

By: fitz

11/04/2005 07:47PM

problem with the identify task in scriptStarted by:Guest, 11/04/2005 07:35PM
Hello Simone,

This is a common "gotcha". The IDENTIFY
task reads input from the
cursor, from parameters, and from the
standard input of the task. It
is this last part, where it asks for
such things as the wavelength,
that causes problems with t...

2681

By: Guest

11/04/2005 07:35PM

apall (V2.12.2) - sky subtractionStarted by:Guest, 11/04/2005 07:24PM
Hello Anupama,

Thank you for including the data. I do
not believe there were any
significant changes between the two
versions of IRAF for the aperture
extraction. Unless you used exactly the
same aperture definitions,
that is the database/ap* f...

2693

By: Guest

11/04/2005 07:24PM

Fwd: Question about spectra reductionStarted by:Guest, 11/04/2005 07:07PM
[b:2a97495062]From: [/b:2a97495062]Frank
Valdes <valdes@noao.edu
([email]valdes@noao.edu[/email])>
[b:2a97495062]Date:
[/b:2a97495062]November 4, 2005 12:06:19
PM MST
[b:2a97495062]To: [/b:2a97495062]Paola
Rodriguez <paola@astro.ufl.edu
([email...

2670

By: Guest

11/04/2005 07:07PM

Fwd: Soar Optical Imager mosaicingStarted by:Guest, 11/04/2005 05:40PM
[b:c32047d51d]From:
[/b:c32047d51d]Eduardo Cypriano
<cypriano@ctiosz.ctio.noao.edu
([email]cypriano@ctiosz.ctio.noao.edu[/email])>
[b:c32047d51d]Date:
[/b:c32047d51d]November 4, 2005 10:17:27
AM MST
[b:c32047d51d]To: [/b:c32047d51d]Frank
Valdes &l...

3259

By: Guest

11/04/2005 05:40PM

A problem with astheditStarted by:Guest, 11/03/2005 10:49PM
Hello Dugan,

The formating is causing a problem. The
program is trying to figure
out if the keyword value is a number or
a string. It assumes a
string starts in column 11 with a quote
mark. Since this is not the
case it is interpreting the va...

3951

By: Guest

11/03/2005 10:49PM

HelpStarted by:Guest, 11/03/2005 10:19PM
Hello Venkat,

I'm sorry for the delay in replying.

The z1,z2 values are the intensity
stretch parameters. There is no
specific criteria for choosing the
values. The same things apply to
simple grey scale display that if one
makes the faintest th...

2804

By: Guest

11/03/2005 10:19PM

IRAF Numerical precisionStarted by:Guest, 11/03/2005 06:00PM
Dear Sir,

I have been using IRAF for a while now
and noticed that the output of
photometric processing tasks, such as
'phot' for example, has a numerical
precision of 3 decimal digits, i.e., an
accuracy of 1e-3.

Is there a way to increase this
accurac...

3140

By: Guest

11/03/2005 06:00PM

xdimsum.makemask: duplicate keyword a...Started by:Guest, 11/02/2005 02:52PM
A local user pointed out the following
error which manifests itself when
running "epar makemask" under PyRAF:

SyntaxError: duplicate keyword argument
(<CL script xdimsum.makemask>,
line 176)

The error message is from Python, which
explains why ...

2700

By: Guest

11/02/2005 02:52PM

software problemStarted by:Guest, 10/28/2005 06:21PM
We are having a problem using the
package msczero and we
are not able to find the solution.

When we start msczero, it loads our
image, but when we try
to do anything on the image (like
pressing x), we get the
message:

the cursor is not in an image

Do...

2576

By: Guest

10/28/2005 06:21PM

problem with the identify task in scriptStarted by:Guest, 10/28/2005 04:03PM
Dear Sirs,

I am writing some IRAF scripts involving
the use of the task "identify".
I would like to use the task
interactively, as when it is launched
from
the command line.
Everything works fine at the beginning:
the task is launched and the
graphica...

2709

By: Guest

10/28/2005 04:03PM

apall (V2.12.2) - sky subtractionStarted by:Guest, 10/28/2005 06:52AM
I am facing problem with the background
sky subtraction while extracting
spectra using apall.

I find that the night sky emission lines
are not well subtracted. I am
currently using V2.12.2. However, I did
not face any such problem when I
was using V...

2510

By: Guest

10/28/2005 06:52AM

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