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artdata.mknoise task gives low values...Started by:karsten brogaard, 01/26/2007 02:39PM
Hi,

I have tried to use the task
artdata.mknoise to add poisson noise to
my images. But for all pixels which are
saturated in the original images (value
= 65535) I get very low values
(~10-100)? Why is that?

Karsten

3933

By: fitz

01/26/2007 02:39PM

Variable star phot with daophot?Started by:FSBoyden, 11/07/2006 01:25PM
Hi all.

I am new to daophot, and enc.

What I would like to ask is, when you do
varaible star photometry in batch mode
on a number if images, must the images
be properly alligned. That is, if you
sit with a problem of varying tracking,
and your images ...

3933

By: phil

11/07/2006 01:25PM

strfits - segmentation violationStarted by:Wendy Roberts, 01/09/2006 08:20PM
The following segmentation violation
occurs under both Solaris and Linux
(IRAF v12.2.2). Can anyone shed some
light?

ymir% cd ~/iraf
ymir% setiraf
ymir% cl
Word too long
ymir% csh -f `which cl`
cl> cd
/data/mimir0/gaetz/data/HST/t1
cl&...

3925

By: fitz

01/09/2006 08:20PM

finder/tfinder on V2.16Started by:massey, 08/21/2012 04:46AM
I tried installing "finder" manually as
an external package in V2.16. After
some fiddling I got it to load okay, but
when I go to run it I get the following:

Image name (cn15ccd069.fits):
Catalog table cn15ccd069.fits.tab
exists, overwrite the file?...

3914

By: Charles Knox

08/21/2012 04:46AM

how to.. change resolutionStarted by:flame, 08/07/2006 02:36PM
Hi!
I need to reduce resolution of my
spectra from R=47000 to R=22000
but I don't know which iraf task does
it.
Someone can help me?

Thanks!

3911

By: fitz

08/07/2006 02:36PM

Specplot No Spectra definedStarted by:raulepuebla, 03/31/2011 01:31AM
Hi!

I just installed the last version 2.15
for linux64. I tried to use the specplot
task, but the screen says: "No defined
spectra". I already tried installing
from binary and from source files, but
the results is the same.

Splot runs ok! shows the sp...

3905

By: fitz

03/31/2011 01:31AM

Spectral Combination (was: a problem ...Started by:Guest, 04/17/2006 04:50PM
Hi,
I am a student coming from beijing
normal university.I have two spectrum
about one star.One's range is
4000-6000A,another is 6000-8000A.How can
i combine them to one spectrum,and the
range become 4000-8000A.what is the
command? Thank you .
...

3896

By: lsh20

04/17/2006 04:50PM

Matching DS9 image with implot imageStarted by:cosmologist, 05/23/2011 03:26PM
I have some basic questions about
understanding the image of a spectrum
that I see in DS9 vs what I see when I
use "implot" to see that same object
spectrum.

Let's say I have a 2D spectrum image on
DS9 where there is a white horizontal
line on a blank ...

3892

By: valdes

05/23/2011 03:26PM

ERROR: Seek error on fileStarted by:corrado, 04/05/2015 09:52AM
Hello all,

the lastest version of IRAF I installed
(2.16) seems not to take lists of
spectra, the problem is not bound to one
particular task. For instance, by using
scopy on a list of spectra @list.fits I
get the error

ERROR: Seek error on file (...

3889

By: corrado

04/09/2015 07:37AM

imcopy problem using sectionsStarted by:massey, 06/18/2009 06:20PM
Hi, Mike et al---

I'm having difficulties copying a
sub-array from an image using "@" files.
Here is a simple example of what I
mean:

ecl> imcopy
rccd070315.0047.fits[96:1052,165:1020]
tempa
rccd070315.0047.fits[96:1052,165:1020]
-> tempa
ecl&g...

3887

By: massey

06/18/2009 06:20PM

Problem with "@" files in onedspecStarted by:massey, 01/23/2014 12:28AM
Hi, Mike et al---

A collaborator who is running V2.16.1 on
her MacBook Pro emailed me with a
problem today that seemed unlikely and
incredible, but in fact I can reproduce
the problem on MY Mac Air also running
2.16.1. Here it is. If I do
something...

3872

By: massey

01/23/2014 01:52AM

Doslit identify database error (pyraf)Started by:parejkoj, 04/09/2009 05:36PM
Hello,

I am using pyraf from STSci (on an Intel
Mac running 10.5.6) to script my IRAF
reductions in python. But I'm getting
an error when running doslit after
computing the dispersion solution. I can
extract the spectrum, find the trace,
identify line...

3864

By: valdes

04/09/2009 05:36PM

astrometry problem on CTIO Mosaic dat...Started by:, 04/26/2006 04:40PM
Hello,

My Mosaic data taken from CTIO-4m on
2004 and 2005 seem have astrometry
problem. MSCCMATCH seems run ok through
them and the rms is less than 1.
But be dithered images could not be
stack well, especially at the center of
the image. By examinin...

3863

By: ping

04/26/2006 04:40PM

Interactive review of CCD framesStarted by:pskoda, 01/22/2007 11:17PM
Hi all,

Before any reduction of CCD frames it is
usually necessary to check the quality
of frames and its image type (e.g. not
to do flatcombine when the flat is
overexposed or if it is in fact the arc
exposure with wrong header...).
Sometimes more det...

3861

By: fitz

01/22/2007 11:17PM

psf fitting questionStarted by:Santiago, 11/01/2009 10:13PM
Hi, i've been doing some of fitting with
daophot, and the resulting psf profile
is the following profile... it is not
like common psf profile, is ok in the
wings, but the central region is
up-side-down !! any ideas what can be
went wrong? i send an atta...

3857

By: AnTaR3s

11/01/2009 10:13PM

gmos gdisplayStarted by:ewehner, 06/21/2006 12:14AM
Hi,

I'm having trouble displaying gmos
imaging fits files using gdisplay. When
I set stdimage=imt4096 and use mscimage
with fill+ it displays the same MEFs
just fine, but when I set
stdimage=imtgmos and use gdisplay,
nothing shows up in ds9 and I get ...

3855

By: ewehner

06/21/2006 12:14AM

imarith operand errorStarted by:Duncan, 05/28/2010 05:32PM
I am trying to run a simple imarith,
which I have done before but can't seem
to figure out why this time I am getting
an error:

[code:1:9fcc426dd7]ecl> imarith
@iobj.list / normiflat.fits
/media/600d2743-de8e-42be-bdab-e91207dfd30b/astronomy/DAO/Feb...

3839

By: fitz

05/28/2010 05:32PM

tracing flats with APFLATTENStarted by:es, 03/02/2006 07:09AM
Hi!

I found the following question and
answer (see below) in your forum but the
solution does not work for me. Do you
have any other suggestions how to solve
the tracing problem in apflatten? Even
using a standard star traced with
aptrace as a refere...

3833

By: valdes

03/02/2006 07:09AM

mscgetcat is not working anymoreStarted by:johannes1808, 08/14/2010 11:26AM
Hi,

there are a lot of problems in last day.
The most curious one is the task
mscgetcat, so it was working quite well
with my mosiac images, but now the
coordinate file is always empty. I tried
NOAO:USNO-A2 and CADC:USNO-A2 quite many
many often, but n...

3830

By: johannes1808

08/14/2010 11:26AM

imlintranStarted by:raa, 02/14/2006 04:58AM
Hi,

I am new to IRAF. I have to deproject a
disc galaxy. From literature it seems
that the task "imlintran" is capable of
doing it. Now the help file gives that
the transformation is:

xt = xt * cos (xrotation) - yt * sin
(yrotation)
yt = xt * sin (yro...

3822

By: fitz

02/14/2006 04:58AM

APPHOT/DAOPHOT ProblemsStarted by:Jason Quinn, 04/29/2007 09:48PM
I'm running 2.12.2a on a machine and I
just tried using APPHOT/DAOPHOT on it
and I'm get problems I've never seen
before.

The first one is that the automatic
"coo" and "mag" suffixes from daofind
and phot, respectively, get added to the
whole filename ...

3815

By: Jason Quinn

04/29/2007 09:48PM

make the cl not complain about files ...Started by:sirmarcos, 02/07/2006 01:39AM
Hello,

So, I write a wide range of iraf cl
scripts and one thing I often do is use
hselect to create file lists. So
something like:

[code:1:1a2b708aa5]hselect *.fits $I,
expr="imagetyp == 'object'"
> object_list
[/code:1:1a2b708aa5]
Howe...

3802

By: fitz

02/07/2006 01:39AM

astrometry with MSCREDStarted by:Guest, 10/13/2005 09:48PM
[b:e48ce6ea01]From: [/b:e48ce6ea01]licia
troisi <troisi@mporzio.astro.it
([email]troisi@mporzio.astro.it[/email])>
[b:e48ce6ea01]Date:
[/b:e48ce6ea01]September 27, 2005
7:42:35 AM MST
[b:e48ce6ea01]To:
[/b:e48ce6ea01]fvaldes@noao.edu
([email]fvald...

3801

By: Guest

10/13/2005 09:48PM

task parameter string problemsStarted by:dougmink, 02/22/2007 10:16PM
Is there a maximum length for strings as
parameter values in tasks?
We have a list of file names which seems
to be too long for epar, dpar, and lpar.
The value can be set on the command
line, and the task uses all of the files
on the list, but when you ...

3797

By: fitz

02/22/2007 10:16PM

Installing Packages?Started by:driebel, 02/04/2010 12:25AM
Hi, as I teach myself IRAF for the first
time, I'm working my way through a few
of the exercises downloaded from
http://iraf.noao.edu/tutorials/tutorials.html,
specifically, those dealing with
spectra. In exercise 3, at step ~3, the
tutorial asks me to...

3796

By: fitz

02/04/2010 12:25AM

ximtool problemsStarted by:gcardonav, 04/27/2010 02:10PM
Hi:

For my research I need to use 256 colors
in the display but everytime I open
ximtool it crashes. I have a Macbook
pro, intel with snow leopard. I can open
ximtool with any other display but for
my research I need 256 colors display.

My second prob...

3788

By: StarryEyed

04/27/2010 02:10PM

question on IRAF 'telluric'Started by:Guest, 10/06/2005 06:41PM
I use IRAF to reduce and analyze Eso VLT
ISAAC spectra and mostly the
procedures run very smoothly. I would
like to use the
'telluric'-procedure in order to wash
the spectra from telluric-lines.
When typing 'telluric input output
calibration' , where...

3786

By: Guest

10/06/2005 06:41PM

Rotational BroadeningStarted by:Guest, 05/03/2006 05:50PM
Hi,

Do you have a code implemented in IRAF
that allow rotational broadening of
spectra? (p.e.; broadened spectra
created for vsini spanning a certain
range
by convolution with a theoretical
rotational profile (Gray 1992)). I would

like to apply the ...

3776

By: fitz

05/03/2006 05:50PM

DohydraStarted by:mzimer, 01/20/2006 04:57PM
I have a problem concerning dohydra.

I use the following version of IRAF:
NOAO PC-IRAF Revision 2.12.1-EXPORT and
after I CCDPROC'ed all the files and
want to use dohydra, I get the following
error message :

ERROR on line 69: Aperture reference
sp...

3768

By: valdes

01/20/2006 04:57PM

appending to a metaplot file in stsda...Started by:massey, 05/15/2006 08:54PM
Maybe this is a question for the boys
& girls at STScI, but my reading of
the
"igi" help pages makes me suspect that
whoever wrote this was just unfamiliar
with iraf command syntax. (They were
certainly unfamiliar with how to
construct a useful help...

3767

By: massey

05/15/2006 08:54PM

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