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Last Post

Automatically fit (and subtract) gaus...Started by:keflavich, 05/28/2009 11:19PM
Hi folks,
I'm trying to do near-IR (JHK)
spectral calibration using IRAF. To
deal with atmospheric absorption, I want
to divide my spectrum by a high s/n A0
star spectrum and then multiply by some
factor / function to get the units
right.
std/s...

3347

By: valdes

05/28/2009 11:19PM

Auto-determination of rotation angle ...Started by:BrainBug, 11/08/2006 11:52AM
Hello all! I need to explane me somebody
how i can auto-rotate images.
I have sum of 20 images of Lyra:
http://donastro.jino-net.ru/1/Lyra_20cadrs_4sec_ISO1600_fullMoon_corrected.jpg

So, what i must to do for de-rotate all
images before summ it?
Tnx!

11980

By: BrainBug

11/08/2006 11:52AM

Austin AAS Demos -- VO and IRAF v2.16Started by:fitz, 12/31/2011 01:04AM
If you'll be at the Austin AAS meeting
next month, I invite you to stop by the
VAO booth for a demonstration of some of
the new VO capabilities (and other
enhancements!) coming in v2.16. A
preview of VAO applications, including
the VO/IRAF integration,...

1182

By: fitz

12/31/2011 01:04AM

atan in IRAFStarted by:mommermi, 04/24/2009 07:44AM
Hi everybody,

I have to calculate polarization angles
and therefore I need the atan function.
Unfortunately, I cannot access this
function and IRAF always wants me to use
atan2, which is actually not the same.

Example:
[code:1:1673c3deac]
cl> print...

2378

By: fitz

04/24/2009 07:44AM

Astrometry Tasks problemStarted by:AAKANKSHA, 06/26/2019 08:09PM
Hi Fitz,
I want to perform astrometry and
photometry on KING 2 open cluster.
Currently, I have updated the WCS using
CCMAP but i still find that the images
don't have the final corrected WCS. Can
you please help out ?
http://iraf.noao.edu/projects/c...

639

By: AAKANKSHA

06/26/2019 08:09PM

ASTHEDIT and keywords containing &quo...Started by:athlonea, 07/06/2007 10:50AM
Hi there,

I've been trying to add a number of
keywords that are not added
automatically by my CCD software to FITS
headers using ASTHEDIT and a
configuration file, however there is a
problem with DATE-OBS keyword. It seems
it's because of "-" (when add...

2621

By: athlonea

07/06/2007 10:50AM

Assigning a file to "result"...Started by:smp, 10/16/2008 08:43AM
hi,

I created a file containg image names.
Now I want to assign this file to
"result" parameter of imarith task.
If I do this as in the following script,
I get the error:
--- Wrong number of elements
in the operand lists

In my srcipt, 'flat_...

3663

By: smp

10/16/2008 08:43AM

Arrays in CLStarted by:esemenko, 04/10/2007 05:11PM
Hello!
I would like to read list of files from
@file to some array. But I don't know
exactly number of records in @file.
That is I need something like
[code:1:1d756ab059]
string sarray[]
int ii = 0
list = 'somefile'
while (fscan(list, s1...

7450

By: fitz

04/10/2007 05:11PM

arraysStarted by:dbrenner, 11/05/2006 10:23PM
The help file says I can define a 2-d
array real x[20,20] but the I get error
messages but I get an error message when
I do. Is this an iraf/pyraf thing?

How do I declare a 2d array in pyraf?

3458

By: fitz

11/05/2006 10:23PM

array error on macos while working pr...Started by:marijnf, 06/03/2009 02:05PM
I have got a lot of scripts working
under iraf/fedora/ncl - and I am having
a problem
running some of them under
iraf/macos/ecl (or ecl under
iraf/fedora). This is an example script:
(pp.cl)

procedure pict(input)

char input{"",prompt="input file"}

be...

1793

By: marijnf

06/03/2009 02:05PM

array and CL problemStarted by:rjvo, 10/28/2010 12:57PM
I start IRAF in xgterm
window:[code:1:df90896515]
ecl
[/code:1:df90896515]
now[code:1:df90896515]
=x
[/code:1:df90896515]
I put 2 [Enter]
now:[code:1:df90896515]
=x[1]
2
[/code:1:df90896515]
now:[code:1:df90896515]
lpar cl
[/code:1:df90896515]
a...

1369

By: fitz

10/28/2010 12:57PM

arc/standard star/object comsbination...Started by:haha, 07/10/2015 09:22AM
Hi all,
If there are two different exposures
along two different columns for one
object, one has to process them
independently, and at last combine the
two spectra to remove cosmic rays?

If arc lines are taken independently,
for example, He/Ne/Ar ar...

790

By: haha

07/10/2015 09:22AM

app-defaults and xgtermStarted by:massey, 09/06/2006 07:36PM
Hi, Mike---

I'm helping a friend who has had iraf
and X11IRAF installed on his Fedora
workstation; I've been told that the
person who did the installation used
the "patched" version, etc. xgterm does
work, but it does find the app-defaults.
(If I go t...

7781

By: massey

09/06/2006 07:36PM

apextract-apall-edit apertures for......Started by:tomph, 03/21/2008 12:10PM
Hi again
To recap I am using cygwin, everything
has been working until this point.
I am using apall on raw images to
extract spectra, i believe i should have
a graph appear when it has worked
correctly.

I have used epar apall to set up most
the option...

2196

By: owen

03/21/2008 12:10PM

apall's multispec vs echelle make dif...Started by:Jason Quinn, 06/05/2009 08:34PM
It appears that choosing "multispec" vs
"echelle" for the format parameter in
the apall task can produce different
APNUM keywords in the output headers. I
tested this on an image after unlearning
apall (actually the imred.kpnoslit
apall) and the relevan...

2558

By: Jason Quinn

06/05/2009 08:34PM

apall problemsStarted by:Bimal, 02/27/2008 05:51PM
Hi Mike, I am back after some time has
passed... I have problems with running
apall. Here is what it happens:
[quote:167dc4d6e0]
List of input images (ima0001.imh):
Recenter apperture for ima0001.imh
(yes):
Warning: OPEN: File does not exist
(localhost...

2284

By: Bimal

02/27/2008 05:51PM

apall outputStarted by:devereux, 06/25/2009 06:55PM
Is there a way to get apall to produce a
text file output of the extracted
spectrum
in columns of "flux" "wavelength" and
"error"?

If not, is there a way to get splot to
do this?

If not, is there any other way to get a
text version of the spectrum?

...

2616

By: valdes

06/25/2009 06:55PM

Apall extracts only 26 pixelsStarted by:sirmarcos, 08/08/2008 08:34PM
Well, this is a new one. I'm befuddled.
apall is acting weird. I'm trying to
use it to extract some echelle scectra.
The apertures have already been found
and traced, but I let apall edit them
and review the tracings, everything
looks fine.

But the...

2735

By: sirmarcos

08/08/2008 08:34PM

apall command shifting the apertureStarted by:Sherry, 02/14/2012 07:39PM
IRAF is giving me apall centers that are
shifted by ~200 channels.
This is only happening with asteroid
spectra as apall is reading out the
correct cenrtwertd for bstandard star
spectra. What is going on?
linux 64 bit iraf v2.15.1a

1331

By: valdes

02/14/2012 07:39PM

anybody did fors2 of vlt spectrum bef...Started by:haha, 11/08/2013 11:47AM
Q1
The wavelength range is fixed once the
grim of fors2 is choosed,right?
http://www.eso.org/sci/facilities/paranal/instruments/fors/inst/grisms.html
what is the wavlength range of g300v?
Q2
Who has the extinction file of Paranal
Observatory whic...

1178

By: haha

11/08/2013 11:47AM

any one with any advice..Started by:james1986, 03/22/2008 12:13AM
i'm currently working using iraf, on my
final year thesis..

trying to use iraf for differiental
phototmetry..

i'm trying to get the instrumention
magnitudes from a set of stars from a
collection of images..

i have tried using imexamine but with
'a...

1641

By: fitz

03/22/2008 12:13AM

Another problem with imalignStarted by:, 06/19/2006 07:59PM
Hi,

I know that there is lots of answers to
problems connecting to imalign, but I
couldn't find just similar to mine.

I have successfully used before imalign,
but this is new problem that I haven't
solved (with tens of other :).

About the problem. Im...

14329

By: moppi

06/19/2006 07:59PM

Another ECL suggestionStarted by:jturner, 11/26/2006 09:49AM
Hi Mike,

First, thanks for implementing some of
the improvements I suggested previously
for ecl. The 2.13 version is quite nice
to use now.

Second, I have noticed something that I
think could be made more convenient.
When I enter an expression with "=...

3662

By: fitz

11/26/2006 09:49AM

And/or logic in IRAFStarted by:piverson, 07/27/2007 04:37PM
Is there and/or logic in IRAF and if so
do you have any short examples of its
use. I am trying to use it in a match
command.

i.e. match ("light" or "object",
"datalist1", > "datalist2")

Thanks,
Paul

3461

By: fitz

07/27/2007 04:37PM

Analysing FITS files with WSTART1Started by:jsmoker, 11/17/2015 12:03PM
Hello,

I am working on some data reduced with
the UVES pipeline. The "merged" spectrum
produced by the pipeline has ripples in
it hence I am hoping to do the last part
of order merging "by hand" in IRAF.

The fits file contains 20 different
orders,...

2020

By: fitz

11/20/2015 04:55PM

An error messageStarted by:smp, 06/04/2009 05:09AM
Hi,

While running my procedure script, I got
following error message:

[quote:11988285bd]*** glibc detected ***
free(): invalid pointer: 0x8005302e
***[/quote:11988285bd]

And then script stopped executing
further commands.

Why do I get this message a...

1611

By: fitz

06/04/2009 05:09AM

ambiguous parameter in imexprStarted by:dbrenner, 09/24/2009 05:37PM
imexpr ( expr= " ( ((sqrt
((I-125)*(I-125) + (J-125)*(J-125) )
> 10 *(a+ 1)) && ((sqrt
((I-125)*(I-125) + (J-125)*(J-125)) ))
=< 10 *(a + 2) ) ? 1: 0", output =
annulus//"[0,overwrite]", a =
"/data/masks/ringvalue.fits", dims =
dim, ver...

1927

By: fitz

09/24/2009 05:37PM

AlignmentStarted by:e92m3, 11/25/2010 12:13PM
I took a series of exposure and I would
like to know whether there is a way to
align them such that a given star in the
different images will be at the same xy
coordinates. I want to do this
automatically without needing to go into
each image and identi...

2132

By: e92m3

11/25/2010 12:13PM

agetcat on usnob1@noao gives not 404 ...Started by:Santiago, 12/08/2016 01:45PM
Hi, i'm trying to solve some plates with
agetcat, ccmap, etc, and i cannot
download the usnob1@noao region, i get
an html 404 not found page. Was this
task deprecated or some? Maybe my way is
not fancy, anyways to plate solve with
other iraf package? My...

906

By: fitz

12/08/2016 04:23PM

after imarith command IRAF saving the...Started by:Sherry, 06/15/2011 09:09PM
I use IRAF to process onedspec from the
IRTF. The images are in pairs and are
subtracted to remove bias etc...
After I subtract the spectral image
pairs the new file is sub***.imh, but
IRAF is saving it as a fits file and I
am not able to extract the s...

5543

By: Sherry

06/15/2011 09:09PM

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