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Wavelength and spectrum separatedStarted by:yaelnaze, 11/30/2009 02:02PM
Hello,
I've an echelle spectrum (flux = fct of
pixel number) on the one hand, and
wavelength calib (lambda = fct of pixel
number) on the other. Both are provided
as fits files (in multispec format).

How can I associate them without fitting
the wavele...

1674

By: fitz

11/30/2009 02:02PM

Change plot line thicknessStarted by:Alida, 06/09/2011 08:04AM
Hi

I am using IRAF for spectroscopy and I
am trying to find a way to change
(increase) the thickness of the line
used to plot the spectrum in splot (or
any other plot window for that matter,
if not possible in splot) for printing
purposes. I thought t...

1675

By: fitz

06/09/2011 08:04AM

TABLES/STSDAS and very large imagesStarted by:csimpson, 07/26/2013 05:07PM
I have a problem when dealing with
images in excess of 2.15Gbytes (i.e.,
2^31 bytes), as STSDAS and TABLES tasks
won't work with them, but core IRAF
tasks like imarith, imcopy, etc. are
fine:

vocl> imarith large_image.fits + 1
junk.fits
vocl> imc...

1676

By: fitz

07/26/2013 05:07PM

ccdprocStarted by:rainswor, 12/01/2008 06:37PM
Hello, we are having a problem running
ccdproc. We are trying to run fixpix but
are are receiving an error message:
ERROR: MWCS: dimension mismatch
(mw_gltermd)
The error message says that there is a
dimension mismatch, but there is no
dimension mismatc...

1678

By: valdes

12/01/2008 06:37PM

problems with clStarted by:china_108, 09/24/2008 12:58PM
i am a beginner to IRAF.
Yesterday someone gave me an iraf
package of photometry. I put it in the
folder of iraf(in the root) and today
when I entered "cl", it says "cannot
find iraf212/iraf/binxxx/cl.e! "
Can anybody help?The file login.cl is
still in ...

1680

By: fitz

09/24/2008 12:58PM

script variablesStarted by:sw, 04/09/2008 06:13PM
Hi,

Hopefully this will be an easy question
to answer if nobody minds taking a few
minutes to read. I'm writing a little
IRAF script and have a little problem,
which essentially boils down to the
following.

I have the variables
[i:260cd3ad7a]image[/i:...

1682

By: sw

04/09/2008 06:13PM

running a task in multiple directories?Started by:Arp, 10/19/2009 12:03PM
Hi!

I've got about several hundred fits
files, and I'd like to extract a
specific value from their headers. But
those files are in different folders, so
I tried hedit -r ... but that does not
work. Is there a way I can tell iraf, or
in this case hedit ...

1683

By: Arp

10/19/2009 12:03PM

data type changes and fits header def...Started by:rclark, 11/26/2008 07:12PM
The calculations in some code need to
have some fairly widespread changes
in data type-- specifically eliminating
the explicit use of the complex
data type, and real needs to be replaced
with double.

So starting at the beginning...

In SPP code a line ...

1685

By: fitz

11/26/2008 07:12PM

Displaying 1x1 fits images in ximtoolStarted by:Jason Quinn, 06/01/2009 08:34PM
I tried displaying a 1x1 (that is, a one
pixel) fits file and I learned several
things. First, IRAF cannot display such
an image using the display command. You
get a

ERROR: Insufficient sample pixels found

error. I assume this is related to some
zscal...

1691

By: fitz

06/01/2009 08:34PM

Hopefully just a basic syntax problem..Started by:AndrewS, 11/30/2010 05:19PM
Hi there

I am trying a most basic step of
grouping images by their JD keyword
(from within a script)..the values often
end one digit after the decimal place
ie. 123.4 or 456.7 and for my purposes I
have assigned these values to the
integer variable i t...

1692

By: fitz

11/30/2010 05:19PM

Error : no release file Started by:AndyR, 10/22/2015 09:28PM
Greetings,

I was successful install IRAF on my mac.
Upon typing cl when it says welcome to
IRAF etc.

Along the lines it says, Error : No
release file

Does anybody know what this is and why?
I would appreciate any recommendations
to how to fi...

1693

By: fitz

10/23/2015 06:43PM

selecting images by quality?Started by:astromaus, 08/05/2010 08:02PM
Hello,

I'm new here and new to IRAF.

I would like to do some photometry
measurements (semi-professional). since
I'm a physisist but not an astronomer, I
need/want to work myself through IRAF (I
used it for a course in university a few
years ago and I ...

1694

By: astromaus

08/05/2010 08:02PM

ERROR: Incompatable image and psf fil...Started by:mdmelita, 02/18/2011 04:27PM
Hi!

I get that error when I want to do psf
on a single image having produced
previously a .mag file and a .pst file.

What I am doing wrong?

Cheers!
Mario

PS: epar psf first lines look like:

image = dufR_0110bf.fits Input
image(s) for which...

1699

By: mdmelita

02/18/2011 04:27PM

IRAF Ram usageStarted by:AnTaR3s, 10/18/2012 10:54AM
Hey

I am trying to use blkavg on about 13000
images and my script is very very
simple:

...
blkavg
(input="Ks_v20091104_00394_11.fit",output="b_Ks_v20091104_00394_11.fit",b1="2",b2="2",option="average")
blkavg
(input="Ks_v20091104_00394_12.fit",output=...

1701

By: AnTaR3s

10/18/2012 10:54AM

extracting 1D spectraStarted by:devereux, 06/24/2009 10:07PM
I am trying to extract a 1-D spectrum
from a 2-D image.

I've tried apall, but got line fluxes
that seemed inconsistent with the data,
although I'm not at all sure that I know
what I'm doing. I used
non-interactive mode, I saw emission
lines in all the...

1701

By: devereux

06/24/2009 10:07PM

C code in procedure scriptStarted by:jacom, 07/22/2011 08:56AM
Hi,

I am using IRAF V2.14

I have a C language code
coordtransform.c which I want to include
in a procedure script.
I have defined it as a foreign task by
task coordtransform = $coordtransform.c
In IRAF it works fine if I do the normal
!coordtransfor...

1705

By: jacom

07/22/2011 08:56AM

script with arrays and imhistogram ha...Started by:duvall, 04/30/2009 05:28PM
The following script hangs on execution.
If one replaces the names of the arrays
by different names, like t1[4], t2[4],
then things work ok.

procedure imhst_test (i)
int i { min=1, max=4,
prompt="which index to use"}
begin
real z1[4], z2[4...

1705

By: fitz

04/30/2009 05:28PM

compiling/linking sppStarted by:rclark, 01/13/2011 11:56PM
I just got iraf 2.15 64 bit linux
installed on my system. Well,
probably. I get a normal looking motd
and cl prompt. Haven't
tried to exercise it much.

I'm trying to compile a simple spp
program.

I got this message:

ecl> xc bittest.x
bittest.x:
...

1706

By: fitz

01/13/2011 11:56PM

Version 2.16 seems not accept FITS ex...Started by:wu_qso, 04/18/2013 09:37AM
Hi everybody,

I have several multi-extension FITS
images. I want to use
noao.imred.echelle.apflatten to check
the flat image. Here is the command and
the output of IRAF:

[code:1:1da3f183d6]echelle> apflatten
HDSA00010439.fits[0]
Searching a...

1707

By: fitz

04/18/2013 09:37AM

Feed parameters to external applicationStarted by:Gaba_p, 07/29/2009 02:21PM
Hi all,

I'm looking for a way to feed parameter
values to an external application I need
to run inside IRAF. For example, I need
to feed values like:

[a given number] [enter key]
[another number] [enter key]
[yes] [enter key]
[no] [enter key]

and so ...

1707

By: Gaba_p

07/29/2009 02:21PM

Fucntion "access" and the t...Started by:smp, 08/25/2009 06:53AM
Hi,

(1)

In my procedure script, I delete the
unwanted files (text/fits files) as:

e.g.

[code:1:3199c2e602]if(access("*_left.fits"))
{
delete("*_left.fits")
}
else {print("file not f...

1712

By: smp

08/25/2009 06:53AM

Dopcor errors and multi-fibre exposuresStarted by:wtaylor, 07/23/2009 05:16PM
Hi,

I'm fairly new to IRAF and I'm trying to
use dopcor to correct for heliocentric
velocities. I'm using a few different
forms of data with ESO headers: some
work fine, but some don't. I get:

onedspec> dopcor science.fits
rebinned.fits 1000 isvel+...

1713

By: valdes

07/23/2009 05:16PM

display command changes pixel values?Started by:stpjhj, 02/19/2018 06:12AM
Hi!

When I use IRAF, I use ds9 to check
images. I do this in following ways
[code]
cl> !ds9&
cl> display whatever.fits
[/code]

But, ds9 shows the values of pixels on
which mouse is hovering, and the value
is different from original ones.
For ...

1714

By: stpjhj

02/23/2018 09:42AM

longslit.background Fit line?Started by:astropunkin, 03/30/2014 05:22AM
I am trying to remove the sky background
from some science spectra using the
longslit.background package. I fill in
the following inputs into the parameter
file

PACKAGE = longslit
TASK = background

input = fncrz0118.HCG40-1219_s3.fits
Input...

1714

By: astropunkin

03/31/2014 12:27AM

task for photometry on extended featu...Started by:Arp, 10/29/2009 03:20PM
Hi!

Since I'm still relatively new to iraf,
I've got a question yet again :)

I want to do photometry on sdss images.
I managed to use imexam to show me the
magnitudes of stars, and it corresponds
well to values given on the sdss page.
Now I want to ge...

1714

By: Arp

10/29/2009 03:20PM

IRAF 2.14 - wcsctranStarted by:maren551, 08/01/2008 04:23PM
Hi there,
I am running iraf 2.14 under Suse 10.3
and on first sight it works fine. But
when I run the task wcsctran it it not
creating the new file, but doesn't give
an error message either. Trying again I
get an error message:' ERROR: Abnormal
terminat...

1715

By: fitz

08/01/2008 04:23PM

How to implement a standard PSF into ...Started by:nusjjsun, 04/10/2014 08:22PM
I'm working on psf-fitting the data from
IRAC. DAOPHOT has a standard procedure
of creating an empirical PSF from
isolated field stars. But IRAC itself
has a standard PSF (they call it PRF
since it's location dependent) for each
of its channel. Those PS...

1716

By: nusjjsun

04/10/2014 08:22PM

implot - segmentation violationStarted by:le.davide, 02/03/2011 02:46AM
Hi guys,
do you know why I receive the message
"segmentation violation" when trying to
use implot?
Thanks in advance.

1719

By: fitz

02/03/2011 02:46AM

Can not open alpha_lyr_stis_008.fitsStarted by:pjpessi, 07/17/2019 07:09PM
Hi, I apologise in advance if this is a
silly question.
I downloaded the file
"alpha_lyr_stis_008.fits" from
https://aeon.stsci.edu/ssb/trac/astrolib/browser/trunk/pysynphot/data/generic/alpha_lyr_stis_008.fits?rev=4677
I want to see the spectra on s...

1721

By: pjpessi

08/29/2019 01:45PM

issue with imcentroidStarted by:christian, 05/06/2010 10:15AM
Hi,

I have a problem with imcentroid and
wanted to ask if this is maybe something
like a known issue or if I am just being
stupid and doing something wrong...

I tried to start incentroid giving it an
image and a coordinate file, so that it
computes th...

1723

By: christian

05/06/2010 10:15AM

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