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Last Post

Using MSCRED on IMACS dataStarted by:drupke, 08/23/2007 03:28PM
Hello,

I am endeavouring to use MSCRED for the
coordinate refinement and stacking of
wide-field mosaic images obtained with
the IMACS camera on Magellan.

I have a WCS solution from star fields.
This particular solution is expressed as
a 3rd-order pol...

3629

By: valdes

08/23/2007 03:28PM

using msccmatch with different geomap...Started by:johannes1808, 08/12/2010 04:32PM
Hi,

I am working on MOSAIC data and I have
the problem, that when I want to get a
good wcs solution I always get an high
error for the rms when I am using
msccmatch. In order to get a better
solution I tried interactive fitting,
but I was not able to c...

2049

By: johannes1808

08/12/2010 04:32PM

using irmfringeStarted by:Zeleke Amado, 08/20/2018 12:29PM
Dear
I had a data consisting of .fits images
taken using GTC 10m telescope. I have
done the preliminary reduction (flat
fielding and bias subtraction). But my
data is highly affected with fringing
problem. For removing this effect I have
reallized to a...

798

By: Zeleke Amado

08/20/2018 12:29PM

Using fitpars in fxcorStarted by:sliss1, 10/07/2010 02:34AM
I am using fxcor to determine the radial
velocities of double lined spectroscopic
binary targets. Unfortunately, some of
the spectra are quite noisy. I would
like to use filtpars to filter out some
of the noise, but am not sure what
values to use for ...

1343

By: fitz

10/07/2010 02:34AM

Using external cut in a scriptStarted by:brentdutra, 12/06/2010 08:51PM
So I've run into a stumbling block with
the syntax that the iraf cl scripting
language uses. I've created a script
which takes in raw images and
coordinates as input and generates a
series of output images per my
specifications. The whole idea is such:
...

1599

By: brentdutra

12/06/2010 08:51PM

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

Using Background Tasks on multi-proc...Started by:sirmarcos, 01/11/2007 10:30PM
So, I'm now running IRAF on a lovely
quad-core Mac Pro. Since IRAF by and
large is single threaded, I'm looking
for ways to speed things up and take
advantage of all my cores. For example
wheN I reduce spectra I typically
generate a "doit" file that i...

5029

By: sirmarcos

01/11/2007 10:30PM

Using apphot to determine magnitudesStarted by:Jen, 06/17/2008 05:53PM
Can anyone give me any general direction
on what commands I should use once I'm
in apphot to determine the magnitude of
a star? Or what information I need other
than the image files? If this is too
vague, I'm sorry - I'm a student who
began using IRAF t...

2958

By: wcorvi

06/17/2008 05:53PM

Using an completely empirical psf in ...Started by:jwalton, 04/21/2008 01:39AM
I am trying to perform psf photometry on
a crowded field using the IRAF Daophot
package, but I am running into a
problem. I am not going about the
standard procedure of creating a psf
from my image since there are not enough
"good" stars to create the p...

5663

By: raybutler

04/21/2008 01:39AM

Use of imedit in crowded fieldsStarted by:paco, 04/22/2008 02:03PM
Hi Mike et al.,
I am trying to use imedit on pretty
crowded and confused images (in my case
regions in emission-line images from
which I have subtracted a continuum
image to remove the stars and keep the
nebulosity alone). Often there's a star
that is ...

2290

By: paco

04/22/2008 02:03PM

Use of DopcorStarted by:rohit, 05/13/2009 01:59PM
I have been trying to combine two
spectra taken at two different epochs.
But before adding them (using sarith
task), I need to correct for doppler
shift. From the help under dopcor, I
find that I need to use rvcorrect to
find vhelio:

spectra1.fits ha...

3650

By: rohit

05/13/2009 01:59PM

Use of ccdlist command in mscred packageStarted by:Guest, 02/16/2006 06:10PM
Dear help;
I can't get ccdlist to recognize or
report the 'ccdtype' aka 'imagetyp'
on fits images. I notice in F. Valdes'
'help page for mscguide'
paragraph 3.3 he states that the task
is specialized and provides a
description of the name...processi...

3485

By: valdes

02/16/2006 06:10PM

Updating WCS of Chandra fitsStarted by:daisymak, 12/15/2006 04:59AM
I am working on Chandra X-ray data.
I have used ccmap to do astrometric
correction of one of the images obtained
by using the command dmcopy on the evt2
file of Chandra. Then I have a database
for storing the result of how to
transform the images.
Wha...

2427

By: fitz

12/15/2006 04:59AM

Update External Package MSCREDStarted by:cptsteiny, 07/19/2006 09:37PM
Hello, a friend of mine has a really old
install of IRAF and a really old version
of MSCRED (I believe it was made in
1998). Updating IRAF doesn't seem to be
an option at the moment.

Anyway, we would at least like to update
the MSCRED package. To upd...

2806

By: fitz

07/19/2006 09:37PM

uparm location slows iraf?Started by:LBT_Dave, 06/13/2009 10:18AM
I ran into something interesting and
unexpected yesterday. I was running a
script I wrote that loops through guider
images (100x100 pixels each) and pulls
some info from the headers with hselect,
then uses tstat to get the means and
sigmas (i.e. nothin...

2461

By: fitz

06/13/2009 10:18AM

Unwanted prompt for list-directed par...Started by:JanRap, 06/01/2010 10:01AM
Hi

I am suddenly getting prompts for my
list-directed structs. Does this have
anything to do with the tasks being in a
package? Below is the relevant code:

[code:1:32d189bccf]# The main task for
the pipeline, from which
# other tasks are called

proc...

1847

By: fitz

06/01/2010 10:01AM

Unresolved point sources with gallistStarted by:rachanab, 07/07/2017 11:26AM
I am making fake sources for my
completeness simulations and I am using
gallist + mkobjects to do this. I can
get a distribution for my sources using
parameters like x and y coordinates,
magnitudes, profile types, half-flux
radii, axial ratios, position...

1125

By: rachanab

07/07/2017 11:26AM

Units of measurementStarted by:asino89, 04/05/2008 03:06PM
I'm having first experiences with IRAF.
I've been introduced by an astronomer
who tough me how to use splot to grab
info about spectra of quasars.
I've been calculating the average value
at 5100A, but i have some problems with
the units of measurement. ...

2734

By: asino89

04/05/2008 03:06PM

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....

4677

By: rohit

01/28/2009 09:08PM

txdump errorStarted by:agiltinan, 08/18/2006 10:16AM
Hi all,
I have recently installed iraf on a
cygwin/XP machine.
Most functions run ok. However, when i
try to use 'txdump' i get the following
error:

'ERROR:Cannot open connected subprocess
(ptools$x_ptools.e)'

As a result my scripts wont function on
...

2725

By: agiltinan

08/18/2006 10:16AM

Two spectrophotometric standardsStarted by:jsm, 06/29/2011 04:49PM
Hello,

I would like to flux calibrate a
spectrum using the data of two
spectrophotometric standard stars (one
red and one blue).

I was able to create two flux files, one
for each star, using the task
"standard". I could obtain the
sensitivity function...

2949

By: valdes

06/29/2011 04:49PM

tvmark usuageStarted by:anestis_tziam, 01/29/2015 08:47AM

Hallo to all

I used daofind on my image to
create a .coo file. When i tried to use
tvmark to overplot the image with the
.coo file i got just a black empty
field. This is my epar. Any hint on
what I have done wrong? Thanks a lot

...

1972

By: fitz

01/30/2015 05:17PM

Truncate Fits HeaderStarted by:AnTaR3s, 11/30/2010 02:43PM
Hi

In order to make a program work, I need
to truncate the fits header. For that I
need to know how many bits I have to cut
off the original fits-file.
Any idea how I can find that out? I
thought vi or emac might do that, but
how?

cheers

1104

By: fitz

11/30/2010 02:43PM

Troubles with installation of mscred ...Started by:Chrissyo, 03/20/2010 10:47AM
Hi everyone.

I'm not a first-time iraf user, but I'm
a first-time iraf installer. I'm
working with some multi-extension fits
files, so I've been trying to get
version 4.9 of mscred installed. I've
already got version 2.14 of iraf
successfully install...

2682

By: Chrissyo

03/20/2010 10:47AM

Trouble with Isophote packageStarted by:mostskier, 07/21/2009 02:29PM
Hi,

I am trying to perform surface
photometry on an optical image of a
galaxy to create a surface brightness
profile as a function of galactocentric
radius. I have been trying to use the
ellipse task in the Isophote package to
do this.

The problem ...

1652

By: valdes

07/21/2009 02:29PM

Trouble with Imarith! (Error: pixel s...Started by:carl2007, 05/09/2007 09:52PM
Dear all,

We are having trouble with the imarith
command in the noao package of IRAF.

In carefully analyzing our scaled
images, the calculated pixel value does
not exactly match the value we expected.
It's close but not exact.

So for instance we are ...

3545

By: fitz

05/09/2007 09:52PM

Trouble with external package tablesStarted by:eratnayake, 12/07/2010 10:39AM
Hi,

I'm running in to an error. Here is my
console output.

[erathna@osiris ~]$ cl
setting terminal type to xterm...

NOAO/IRAFNET PC-IRAF Revision 2.14.1
Mon Sep 15 10:12:05 MST 2008
This is the RELEASED version of IRAF
V2.14 supporting PC sys...

2806

By: eratnayake

12/07/2010 10:39AM

trouble installing x11irafStarted by:al374, 04/27/2008 07:31PM
Hello, I'm running on OpenSUSE v10.3

I unloaded the x11iraf-new_gcc.tgz in my
local direction

% tar -xvf x11iraf-new_gcc.tgz

and I am trying to utilize the install
command, because xmkmf isn't a known
command for me.

I'm having trouble with th...

2945

By: al374

04/27/2008 07:31PM

Trouble creating a packageStarted by:JanRap, 05/17/2010 10:02AM
I am trying to create a simple package
to test whether I can get one task to
call another.

Below is the package file for the "test"
package (test.cl) as well as the two
tasks I am using.

[code:1:031f3b7b56]# Package script task
for TEST package

# Loa...

1623

By: JanRap

05/17/2010 10:02AM

Trouble building CTIO on UbuntuStarted by:bpohl, 06/25/2007 09:26PM
Howdy, I've just installed IRAF 2.12.2
with the patch-2a on a machine running
Ubuntu with linux kernel 2.6.17-11. I'm
trying to build the CTIO package from
source, something i've done dozens of
times on redhat systems, but the build
fails. There are m...

2936

By: fitz

06/25/2007 09:26PM

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