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Last Post

Converting from cd matrix to crota/cd...Started by:hberrier, 09/23/2008 08:37PM
Hi,

I'm trying to use a galaxy photometry
routine created by my advisor that
requires the wcs header keywords "crota"
and "cdelt". Unfortunately, the wcs in
my headers uses the cd rotation matrix.
Is there a quick way to convert from the
cd matrix t...

4026

By: hberrier

09/23/2008 08:37PM

convolving spectraStarted by:rohit, 04/27/2010 10:58PM
Can spectra of a non-rotator be
broadened in IRAF for a specific
velocity? Basically I am calculating
rotational velocities for the stars
using the technique as stated in
Bailer-Jones et al. 2004, A&A, 419,
703. I would like to know if IRAF can do
...

1371

By: fitz

04/27/2010 10:58PM

coordinate ambiguity in ccmapStarted by:paco, 01/23/2012 03:07PM
I am trying to refine the WCS on images
for which I have precise pixel (logical)
positions and RA, Dec for only two
stars. (I'm working with Chandra X-ray
data with only a few point sources.)
Two stars are sufficient to get a plate
solution using rsca...

1767

By: paco

01/23/2012 03:07PM

Coordinate file generated by daofind ...Started by:Arghya, 05/24/2022 01:38PM
Hi ,
I am currently a beginner with
IRAF and am trying to overplot the
coordinate file generated by Daofind
package , but unfortunately the file has
no data , only the header names ,format
and units. I have tried experimenting
with different par...

1537

By: fitz

05/26/2022 07:17PM

Copying WCS Distortions to a new ImageStarted by:joshw, 04/23/2010 09:52PM
Hi,

I'm trying to set up a process by which
I can add accurate WCS to images in an
automated way. The images have little
or no WCS info embedded in the header to
begin with and my first step is to solve
using the Astrometry.net software. This
inserts...

1927

By: joshw

04/23/2010 09:52PM

Corruption when reading 64-bit images...Started by:jturner, 09/04/2012 08:10PM
Long time no post...

With IRAF 2.15 and 2.16 and the "macosx"
binaries, I'm getting incorrect values
when reading double-precision images,
corrupting subsequent processing. I can
reproduce the problem simply by doing
this:
[code:1:652f259940]imarith de...

3869

By: jturner

09/04/2012 08:10PM

cosmic lacos problemStarted by:sapna, 01/28/2016 07:11PM
I have a script: cosmic.cl as:
!ls *bf.fits> c.in
!sed "s/bf.fits/bfc.fits/g" c.in> c.out
!sed "s/bf.fits/bf.pl/g" c.in> bad.in
string *list1
string *list2
list1="c.in"
list2="c.out"
list="bad.in"
task
lacos_spec=/scisoft/share/iraf/extern/stsd...

1421

By: sapna

01/29/2016 04:45AM

Could somonew explain this script's b...Started by:sakenjm, 05/31/2007 02:45PM
Hi,

I don't understand what is wrong here.
Here's a simple script:

procedure foo(aa)
string aa="Testing" {prompt = "Does
this work "}
print ("var= ",aa)
begin
string laa=""
laa=aa
print ("lvar=",laa)
end

Here's what happens when I run it:

cl> t...

2964

By: fitz

05/31/2007 02:45PM

couple minor help doc tweaksStarted by:Jason Quinn, 01/11/2009 05:55PM
In the skysep help SYNOPSIS section,
"Given to RA/Dec value pairs..."
should read "Given
[b:77e1a8e7bd]two[/b:77e1a8e7bd] RA/Dec
value pairs..."

Also, for this task, perhaps using
enum="hr|deg" for the raunit is
worthwhile to prevent mistakes lik...

2032

By: Jason Quinn

01/11/2009 05:55PM

Creating a comment for a wrong input...Started by:smp, 09/29/2009 04:16AM
Hi,

I want to know how to display a comment
like

[quote:e4c36606e9]Either YES or NO
options are available for this
parameter.
[/quote:e4c36606e9]
whenever I type any string other than
"yes" / " no" as input to a hidden
parameter in my own task ( a pr...

2056

By: smp

09/29/2009 04:16AM

Creating a custom splot.log fileStarted by:ezrastar, 05/25/2010 07:01PM
I am looking for a way to either
customize the default splot.log file, or
to create an additional log file which
only records certain data. I've searched
online but haven't found anything to
this effect. Any ideas? Thanks!

Ezra

1797

By: fitz

05/25/2010 07:01PM

Creating a new TaskStarted by:Lianne, 11/26/2008 05:05PM
I'm trying to create a new task in Iraf.
I have been given a script

[color=green:2de29b8269][i:2de29b8269]procedure
markit (reffile)

string reffile
string *flist

begin
flist = reffile

while ( fscan (flist, s1) != EOF ) {

if (access (s1) ...

4160

By: Lianne

11/26/2008 05:05PM

Creating a new WCS solution for MosaicStarted by:tiraf, 05/28/2009 02:38PM
I am reducing CTIO Mosaic data with the
most recent WCS solution files (from
2007).
When I "MSCCMATCH" the individual frames
I am left with significant residuals (up
to 1 pixel in a wave-like pattern) in
the y direction (delta_y vs. y, or the
"s" key).
...

1654

By: tiraf

05/28/2009 02:38PM

creating image names and making a fil...Started by:smp, 10/15/2008 05:14AM
Hi,

I want to do this in my procedure
script:

1. Create image names.
2. Make a file of these image names
3. use this file as "result" parameter
in imarith task

[i:b41afb10d2](I have used pset
parameter in script; so that
operand2=z...

1958

By: valdes

10/15/2008 05:14AM

Creating image names within for loop ...Started by:smp, 10/23/2008 11:41AM
Hi,

In the following segment of procedure
script, I am trying to create image
names and pipe them to a string
variable, one bye one.

But I am getting the error:
Attempt to access undefined local
variable `str'

[code:1:ecbc94a136]
:
begin
...

4834

By: smp

10/23/2008 11:41AM

Creating image sections using imcopy ...Started by:smp, 10/21/2008 04:18AM
hi,
I want to do following:
In following segment of a procedure
script,
[b:c26519f5c1]newfile1[/b:c26519f5c1] is
a file which contains 5 image names.
[b:c26519f5c1]newfile2[/b:c26519f5c1] is
a file which will contain image section
[1:1084,*] of each of ...

3001

By: valdes

10/21/2008 04:18AM

Creating JD-Mag table in IRAF.Started by:bulash, 12/12/2006 02:38PM
Hi Everyone,

In DAOPHOT; after phot, we have taken
the " *.mag.* " (very confusing) files,
It is very hard to take the magnitude
value of a listed star from this files
one by one, and additinally they do not
contain JD.

I just need a text file which c...

5510

By: fitz

12/12/2006 02:38PM

Creating MEF from independent FITS filesStarted by:azurita, 03/05/2008 04:12PM
Hello!
We have downloaded some ESO archived
imaging data.
The data comes from FORS2/VLT (mosaic of
two 2k x 4k CCDs).
Each exposure is archived into two
independent FITS files,
rather than a single MEF.
We would like to use 'mscred' for the
data reducti...

3332

By: azurita

03/05/2008 04:12PM

creating NaN's in a fits imageStarted by:jkrick, 07/06/2006 12:50AM
This may be strange, but I would like to
make some of the pixels in some mosaic
images have the value "NaN". I have
tried imarith and imexpr, using either
log of a negative number or dividing
images by 0, but the tasks quit with
errors and won't write...

5539

By: fitz

07/06/2006 12:50AM

creating simple test imagesStarted by:AndrewS, 03/14/2012 09:57AM
Hello

I want to create simple "test images" (
ie.completely artificial images where I
define the value of every pixel) to see
if the functions I am attempting to
apply to an image are working correctly.
So these test images would likely have a
very si...

1244

By: AndrewS

03/14/2012 09:57AM

Creating text files in scriptsStarted by:Nostril585129, 12/10/2008 01:38AM
Hello there! This is my first post, but
I've been reading the forum for weeks.
You guys have been great helping me to
understand IRAF.

My problem has to do with having my cl
script output a package's results to a
text file. When not in a script, I
ofte...

2022

By: Nostril585129

12/10/2008 01:38AM

crmedianStarted by:dbrenner, 01/09/2012 04:47PM
Should this work when using crmedian on
the command line?
crmedian( input = file, output =
file//"[0,overwrite]" )

thanks

1273

By: fitz

01/09/2012 04:47PM

Crop N pixels from extracted echelle ...Started by:IvanRamirez, 07/21/2008 04:59PM
Hello,

I have an extrated echelle spectrum of
~60 orders, 2048 pixels each. The last
~100 pixels of all orders are useless
and I'd like to remove them; i.e. I'd
like to create, from the original
spectrum, another echelle spectrum of
~60 orders but ~194...

2342

By: IvanRamirez

07/21/2008 04:59PM

CROSSDRIZ bug?Started by:itso, 09/10/2008 11:07AM
I just encountered a weird bug in the
CROSSDRIZ command. Upon executing

[code:1:b073e29409]crossdriz @input.list
refimage @input.list//C
&[/code:1:b073e29409]

I get the error that the number of items
in the input and output lists are
different. Ap...

1805

By: fitz

09/10/2008 11:07AM

Crossdriz segmentation violationStarted by:itso, 08/07/2008 05:35PM
System: openSUSE 10.2, Linux
2.6.18.8-0.1-default x86_64
IRAF version: 2.14
TASK = crossdriz

[code:1:c803c221bd]ERROR:
segmentation violation
"function="cosbell",
verbose=verb,
mode="h")"
line 227: dithe...

2115

By: itso

08/07/2008 05:35PM

Crowded Field PhotometryStarted by:astro07, 05/16/2007 07:50AM
I'm looking at a star that gets really
faint (V mag ~20) and is about 40" away
from an extremely bright B2 star. Using
phot, my annulus gets contaminated by
the light from the bright star so the
annulus radius and width I choose has a
significant impac...

3837

By: astro07

05/16/2007 07:50AM

CRPIX ShiftingStarted by:Nostril585129, 01/21/2009 07:40AM
I am attempting to use the WCS reference
pixels within an image header (CRPIX1 /
CRPIX2) in order to help perform an
xyxymatch between two images. By using
the difference in the WCS reference
pixels in both the CRPIX1 and CRPIX2, I
was attempting to mak...

5196

By: Nostril585129

01/21/2009 07:40AM

ctio.bitstat does not seem to work in...Started by:johnf5007, 04/22/2015 08:43PM
Hello IRAF gods,

The very old (but handy) bitstat command
seems to not be installed properly on my
IRAF installation, though other tasks in
the ctio package do work:

ecl> ctio
apropos compression.
fft1d gki2cad imso...

1247

By: johnf5007

04/23/2015 02:39PM

ctrl D not working while doing photom...Started by:dimrsl, 11/10/2023 04:28PM
iraf v2.17
ds9 8.3

Ctrl D is working in general but while
Im trying to select (I set the cursor
above my object and click 'r' ) my
reference objects and main object on ds9
this operation is not working, so Im not
able to save or finish the task or a...

1055

By: fitz

11/11/2023 01:27AM

Cursor file problemStarted by:Sidh, 06/15/2015 08:47PM
Hi everyone,

I am a new IRAF user, and I have some
problem with the splot command.

I try to use it to save some
informations in a .log file but there is
no .log file registered at the end of
the operation.
Here is the line I use ;
[code]splot(nb...

1478

By: Sidh

06/19/2015 07:16PM

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