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Last Post

some daophot inconsistenciesStarted by:Jason Quinn, 07/05/2008 01:29AM
I noticed some minor bugs and
inconsistencies in the handling of
certain things in
[b:030987ae51]daophot[/b:030987ae51]
package that should be easy to fix.

1) The [b:030987ae51]phot[/b:030987ae51]
and
[b:030987ae51]pstselect[/b:030987ae51]
tasks' outpu...

1949

By: fitz

07/05/2008 01:29AM

some apextract help files fixesStarted by:Jason Quinn, 04/24/2008 07:31PM
Some of the defaults shown in the help
files are out of sync with the current
default parameters. I've been learning
some spectroscopy lately and reading the
help pages in the
[b:0ca26052c2]onedspec[/b:0ca26052c2]
and
[b:0ca26052c2]twodspec[/b:0ca26052c...

2187

By: Jason Quinn

04/24/2008 07:31PM

SNR calculation in splotStarted by:gmaravel, 06/16/2015 04:59PM
Hi!

I know that the "m" keystroke in splot
gives the rms and snr of a spectrum.
However, I would like to understand how
this is calculated, but there is nothing
(obvious at least) at the help page of
splot.

I did a searvh in the forum to see if
...

3456

By: fitz

06/16/2015 05:05PM

Snow Leopard and scriptsStarted by:dbrenner, 09/13/2009 02:43PM
I'm having trouble running scripts on
Snow Leopard. I ran a script using print
and imarith but am having no luck using
imexpr and iminsert. I've used imexpr
many times previous with earlier
versions of Mac OS.

Here is one example of what didn't work.
p...

4224

By: rohit

09/13/2009 02:43PM

Smoothing image segmentsStarted by:tiffa019, 01/30/2009 03:28PM
I'm working on a set of images with
IRAF. I have replaced a bad (over
saturated) part of an image with another
section from a good image, but I want to
do a smooth transition between the two
pieces (something like a 3rd order
polynomial). I've been to...

2185

By: fitz

01/30/2009 03:28PM

Slow cygwin IRAF problem.Started by:Mattias Ergon, 10/16/2009 05:38PM
Hi!

I have a problem with cygwin IRAF
installed on my XP laptop. Sometimes
(often) IRAF tasks are running very
slowly. Checking the CPU it's more or
less idle. Running an strace on
x_images.e shows that most time is spent
in connecting to port 1432. Th...

2085

By: Mattias Ergon

10/16/2009 05:38PM

Slow center markingStarted by:, 05/06/2006 11:29AM
Hi all,

I am working on photometry of an Abell
cluster with some 500 galaxies in the
field. Galaxies have to be marked
manually. I am doing this via center
task, interactively. I've enabled the
the neccessary options to mark the
centers in ds9, and th...

5517

By:

05/06/2006 11:29AM

Slalib packageStarted by:Gaba_p, 06/18/2009 01:33PM
Hi,

I need to access one of 'slalib'
functions and I can't figure out how to
do it. I've tried typing 'ecl> math',
'ecl> slalib', 'ecl> dtf2r',
'ecl> math.slalib' and more
combinations of this, but nothing.

Thanks,
Cheers!

2070

By: fitz

06/18/2009 01:33PM

Simple tvmark questionStarted by:Gaba_p, 11/11/2009 08:50PM
Hi all,

I'm trying to do something very simple:
I want to delete all stars found by
daofind inside a given region (an
arbitrary polynomial) . I've been
experimenting with the 'e', 's', 'f',
keystrokes and ':save', ':write', etc..
commands, but I can't ...

4697

By: fitz

11/11/2009 08:50PM

Simple scripting question 2Started by:Gaba_p, 04/14/2009 02:26PM
Hi (me again),

I'm trying to assign values read from a
file to variables with different names
(in a procedure script). Maybe an
example will explain better what I want
to do:

procedure ()

struct *list

begin

int i
string variable

list = 'file1'
i =...

1464

By: fitz

04/14/2009 02:26PM

Simple scripting questionStarted by:Gaba_p, 04/13/2009 09:17PM
Hi,

I've written a procedure script which
uses the 'fields' task. I can't make it
stop asking me to confirm the lines to
be extracted. This is how the 'fields'
parameters are set:

fields.mode = 'hl'
fields.files = 'file1'
fields.fields = "1-2"
fields....

1774

By: Gaba_p

04/13/2009 09:17PM

Simple photometry errors questionStarted by:Gaba_p, 02/23/2012 01:34PM
Hi,

my question is fairly simple I think.
When the photometry process is done, I'm
presented with a file containing several
columns named:

# 1 object id
# 2 x
# 3 y
# 4 V
# 5 error(V)
# 6 BV
# 7 error(BV)
# 8 UB
# 9 error(UB)
# 10 VI
# 11 error(VI)

T...

1450

By: Gaba_p

02/23/2012 01:34PM

Simple mkobsfile + invertfit questionStarted by:Gaba_p, 09/13/2010 03:28PM
Hi,

this is my question: which one (if any)
of this tasks (mkobsfilke, invertfit) is
the one in charge of matching stars
across different exposures?

I'm working with a field observed in 4
different fields through 3 different
exposure times. I realized...

1747

By: Gaba_p

09/13/2010 03:28PM

Simple datapars.sigma questionStarted by:Gaba_p, 06/01/2009 06:33PM
Hi,

I'm following the Massey-Davis guide to
perform CCD photometry. In this guide
there's a 'sigma' value mentioned
(actually the greek letter for sigma is
assigned to this value, but I don't know
how to insert greek letters), which is
calculated like ...

3502

By: fitz

06/01/2009 06:33PM

Simple aperture correction questionStarted by:Gaba_p, 01/29/2010 04:30AM
Hi,

I perform PSF photometry over a frame
and when I get to the aperture
correction part I have a problem. To
perform the aperture correction I use
the same PSF stars I used doing the
photometry. The thing is that when I run
the 'phot' task (with the t...

1991

By: valdes

01/29/2010 04:30AM

Signal-to-noise ratio of a certain star?Started by:wu_qso, 03/20/2008 02:20AM
Is there a simple way to know the
signal-to-noise ratio of a certain star
on a FITS image? Is it possible to be as
simple as by just clicking on the
object?

6056

By: wu_qso

03/20/2008 02:20AM

Sexagesimal format conversion ?Started by:lpetras, 04/20/2009 01:41AM
I have some FITS image files that have
their RA and DEC keywords in a format
that IRAF tasks do recognize as being in
sexagesimal format and wondered if their
was a task that would take the string
and convert it back to one that is
understood by IRAF.

...

2535

By: lpetras

04/20/2009 01:41AM

Setting daopars.maxnstar in PyRAF to ...Started by:debrunlm, 09/16/2015 02:28PM
Hi,

I have been having an issue trying to
set daopars.maxnstar to a higher value
than the default of 50000 in PyRAF. In
the script I have
iraf.daopars.maxnstar.p_max = 200000
this results in the following error.

Traceback (innermost last):
File...

740

By: fitz

09/16/2015 07:53PM

SETAIRMASS utmiddle format and MKNOBS...Started by:subasavage, 06/05/2011 03:39PM
I see from the "IRAF V2.14.1-EXPORT
Release Notes" that the
[i:a08bbd16d8]setairmass[/i:a08bbd16d8]
utmiddle format is always in date
format, rather than the format defined
in the UT keyword. This is causing
problems when I run
[i:a08bbd16d8]mknobsfile...

3148

By: subasavage

06/05/2011 03:39PM

set evironmentStarted by:arthit, 08/04/2006 09:09AM
I am installing iraf v2.12 in my labtop,
using RedHat9.0.
Core iraf and BIN files are extracted at
/home/iraf/iraf and
/home/iraf/irafbin follow in PC-IRAF
installation guide. Next, I try to
run the install script. I cannot use
'setenv iraf /home/iraf/i...

6574

By: arthit

08/04/2006 09:09AM

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 ...

1692

By: astromaus

08/05/2010 08:02PM

segmentaton violation with 2-meter KP...Started by:daniela, 03/31/2014 07:23AM
Hello,
I am at the dome of the KPNO 2-m
telescope and have downloaded on my
laptop a bunch of images just obtained
with the
CCD camera (STA3) .
To much of my surprise, I can't read
these images in IRAF. No matter what
package I use, I get: `ERROR: ...

1081

By: fitz

03/31/2014 02:43PM

segmentation violation with txdumpStarted by:Polly, 02/11/2010 11:19AM
Hi I have an other problem already:

I'm using pyraf on OS X 10.5.8 with
bash. When I try to use the txdump
routine it always gives me the error:

ERROR (501, "segmentation violation")

What went wrong? I saw similar problem
in the Forum already but not...

1968

By: Polly

02/11/2010 11:19AM

Segmentation violation with some dataStarted by:iz, 06/22/2011 02:55PM
Hi,

I'm using IRAF 2.15.1a on a 64bit Mac
and experience the following problem
with a FITS file from the UKIDSS survey
(available at
[url]http://nice.sai.msu.ru/~iz/ukidss_iraf.fits[/url])
which is supposed to be OK:

[code:1:f5b132717d]
tv> display...

2089

By: iz

06/22/2011 02:55PM

Segmentation violation when imcombine...Started by:iaa, 01/29/2014 11:24AM
The imcombine task exits with "ERROR:
segmentation violation" when the input
list has more than fifty images.

The script:

[quote]#! /iraf/iraf/bin.linux64/ecl.e
-f

# Packages
images
immatch

imcombine ("bias_00.fits, \
bias_01...

2194

By: iaa

01/30/2014 05:10PM

Segmentation Violation for a .imh imageStarted by:stevenford17, 03/25/2008 10:59PM
I would love to hear from anyone who can
comment on and help me fix this error
that I received while trying to bring up
a subtracted image. Basically, I
subtracted one image from another and
created a new file. When I try to bring
up that file using "im...

2709

By: stevenford17

03/25/2008 10:59PM

segmentation violationStarted by:wuxiaohan, 06/29/2015 11:54AM
I was doing photometry for a star
cluster, with ds9 opened. When I ran
daofind, the file image.coo.* appeared
in the process but vanished when it
ended, while den*.fits remained. And I
got this "segmentation violation". I
didn't find out what the proble...

2340

By: wuxiaohan

07/03/2015 07:23AM

segmentation violationStarted by:giannicatanzaro, 11/21/2014 05:29PM
Hi

I installed the new 2.16.1 on my
openSUSE 12.1 laptop and I got some
problems:

if I use "imdelete" or "ccdproc" I got
the errors "segmentation violation", and
of course I did not
have this problem with the 2.15 on the
same computer

any help...

1162

By: fitz

11/25/2014 07:25AM

segmentation violationStarted by:pepa, 07/19/2008 12:10AM
I edit imcombine params file by doing
epar imcombine but when I try to save
the parameters and quit with ^D :go
:wq....I have tried all the things I
know
always replay segmentation violation and
the parameters are not changed.
Any ideas?? . Please ans...

1773

By: fitz

07/19/2008 12:10AM

Segmentation fault when imarith attem...Started by:grayro, 07/01/2014 07:50PM
Hi,

I have just migrated to a new hard disk
on my laptop. I have re-installed IRAF
2.16, and have as well installed the
patch. However, when I run a script
(called axom1_2cb.cl), which works
perfectly well on other computers, I am
consistently gett...

3555

By: grayro

07/16/2014 09:29PM

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