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calculating with WCS keywords...Started by:Arp, 02/04/2011 09:54AM
Hello,

I am writing a program in java, and as a
part of it, I want to calculate pixel
coordinates, based on wcs header
keywords.
So, I got the rotation matrix CD11 CD12
CD21 CD22 already calculated and saved
in the header by another program.
Now I want...

2995

By: fitz

02/04/2011 09:54AM

OverscanningStarted by:hawcheng, 06/15/2010 07:16PM
General question on overscan fitting and
bias frame subtraction : why do people
do both? It seems that simply
subtracting a bias frame from one's
program frames would accomplish the same
thing, as the bias frames ought to have
the same bias level as the...

2993

By: jturner

06/15/2010 07:16PM

New Linux Astronomy DistributionStarted by:fitz, 08/13/2013 06:48PM
[color=red:f8f966c85a][Moderator's Note:
Posted on behalf of
bamm@astronomy.com.ph][/color:f8f966c85a]

Hello,

I wish to introduce to you my project,
Distro Astro, a Linux
distribution for astronomy.

Distro Astro has IRAF preinstalled, with
X11Iraf, X...

2911

By: fitz

08/13/2013 06:48PM

Tool to analyze allsky and normal ccd...Started by:Daedalus, 11/05/2010 05:53PM
Hi!

I was looking Linux programs to analyze
allsky and other camera images and found
IRAF.net web page.

Not sure, but is there programs in IRAF
that can analyze sky images to generate
FITS images? Or anything else that can
try to find stars from ccd ...

2760

By: fitz

11/05/2010 05:53PM

NCOMBINEStarted by:le.davide, 01/09/2011 11:21PM
Hi,
I know that this is not an IRAF
question, but...if the keyword NCOMBINE
is missing in a header does it means
that NCOMBINE=1?
Many thanks!

2590

By: fitz

01/09/2011 11:21PM

Sky! Sky!Started by:hawcheng, 04/22/2010 05:51PM
If there is no moonlight, how much
variation in the sky brightness for a
given field can I expect? I have 40
exposures of the same field taken across
a year, and after accounting for
exposure time differences, I'm still
finding the sky level to vary by ...

2527

By: FSBoyden

04/22/2010 05:51PM

Tale of Two FramesStarted by:hawcheng, 09/13/2010 08:22PM
Got a general question / mystery.

I have two frames of the same object
taken in succession. The stars in frame
A are half as bright as those in frame
B. Yet frame A has slightly better
seeing, as in a lower FWHM for its
stellar profiles, so that appare...

2467

By: fitz

09/13/2010 08:22PM

certain pages on iraf.noao.edu websit...Started by:AndrewS, 10/10/2010 12:59PM
Hi all

I want to download iraf v2.11 but when I
go to the following:
http://iraf.noao.edu/iraf/ftp/iraf/v211
I get a not found page..
Can anyone tell me what is the problem
or failing that what is the easiest way
to download iraf v2.11 (which i belie...

2279

By: fitz

10/10/2010 12:59PM

yes YES no NO ...Started by:milena, 01/07/2011 11:51AM
Hey,

Sometimes IRAF asks something like:

Fit aperture 1 interactively?
(no|yes|NO|YES) (yes):

What is the difference between no and
NO? and yes and YES?

THANK YOU!! :)

milena

2278

By: Jason Quinn

01/07/2011 11:51AM

Anybody have had troubles with spectr...Started by:jorge, 09/29/2010 11:45PM
Hello:

I wonder if anybody have had problems
with spectroscopic data taken with
GMOS?... I took data in NOD&SHUFFLE
mode and I realiced that my bright
spectra have fake features in the
550-650nm range, specifically two bumps
with broad emission lin...

2090

By: jorge

09/29/2010 11:45PM

"Find all posts" problem - ...Started by:rjvo, 03/11/2011 10:09AM
My user name was 2-letter long; The
"Find all posts" did not work. I changed
my user name ("Account Information ->
User Name") for 3-letter long and all
seems to work nice.

2082

By: rjvo

03/11/2011 10:09AM

IRAF tasks to Astropy/PythonStarted by:lianou, 06/28/2013 01:39PM
Hi,

I was wondering if there are any plans
to translate IRAF tasks to Python
equivalents, and in particular I am
interested in the following tasks:
noao.artdata.mkpattern
images.immatch.wregister
images.imcoords.ccsetwcs

Thank you,

Sophia

1817

By: lianou

06/28/2013 01:39PM

imcopy cannot open imageStarted by:manolis.r, 05/13/2014 02:19PM
Can anyone help me?
I am using imcopy to make cutouts of a
large image. The problem is that if I
use a file (e.g. image_in) in the input
keyword it can't read the image.
The parameters I am using are:
input = @image_in
output = @image_out
verbose =...

1740

By: manolis.r

05/13/2014 04:44PM

Can I permanantly crop my spectra?Started by:mnicholls, 03/18/2014 01:18PM
I have been analyzing spectra using
splot and have identified specific
emission lines I want to focus my
research on. I know it is entirely
possible to zoom in on these features to
analyze them but I was wondering if
there was any way I can cut these fe...

1738

By: mnicholls

03/18/2014 01:56PM

Paralell or multiple IRAF sessions?Started by:Santiago, 03/08/2014 11:35PM
Hi, i'm trying to take advantage of my
home system, an AMD FX-8120 8 core
system with 16GB of RAM (upgradeable to
32gb) and 2 SATA 3 HDDs. I wonder how
can i run IRAF in paralell, so it uses
all 8 processors, RAM and/or hard drives
IO capabilities, or m...

1713

By: fitz

03/09/2014 02:03AM

ERROR: FXF: must specify which FITS e...Started by:youssef, 08/24/2017 10:19AM
Hi,

I start tr reduce the data using
ccdproc
So, when I run it in my xgterm with list
of data ccdproc(@lis2calibA) is not
working !!
It show me this Erreur:

ERROR: FXF: must specify which FITS
extention (path of image)

Can you help me !!
Wi...

1623

By: youssef

08/24/2017 10:19AM

greek.psStarted by:Jason Quinn, 12/26/2016 05:15PM

Hi, Mike.

In the cdl releases, there's a postscipt
file called "greek.ps". Do you happen to
remember how you generated that file any
chance?

Cheers,
Jason

1360

By: fitz

01/23/2017 05:08PM

HTTPS at IRAF.NETStarted by:Jason Quinn, 08/01/2016 07:57AM
When I try to connect to iraf.net
through the HTTPS protocol with Firefox,
I get the following message:

[quote]Your connection is not secure

The owner of iraf.net has configured
their website improperly. To protect
your information from being stol...

1291

By: fitz

08/01/2016 03:42PM

Gemini data questionStarted by:fitz, 08/27/2013 11:14PM
[color=red:c1429c0040][Moderator's Note:
Posted on behalf of user
ghang.naoc@gmail.com]
[/color:c1429c0040]

hi all,
I need to do photometry for program
ID GS-2010B-Q-63 by Gemini-S.
Now I meet some problems which
confuse me much.Could someone ...

1153

By: fitz

08/27/2013 11:14PM

CDL statusStarted by:Jason Quinn, 10/21/2015 12:30PM
Hi. Couple questions about the CDL.

What is its current development status?

The FTP site

ftp://iraf.noao.edu/iraf/x11iraf/

lists cdl-1.9.tar.gz as the latest
version, while x11iraf-v2.0BETA comes
bundled with a version which I believe
is an...

972

By: fitz

11/01/2015 04:51AM

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