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Last Post

Trimming Fits image in ds9Started by:bedosti, 06/21/2007 09:33PM
Is it possible to trim a fits image in
ds9? I have a large image and I need to
produce a new one, containing only a
part of the original.

Any help would be appreciated.
Thank you
Bedosti

4320

By: fitz

06/21/2007 09:33PM

Transforming a 1x1 binned image to 2x...Started by:dschumac, 10/31/2009 08:57PM
Does anyone know if there is a way in
IRAF to take an image that is binned 1x1
(so say 1024x1024 pixels) and change it
into a 2x2 (in this case 512x512 pixel)
binned image?

My problem is that I have star images
binned 1x1, but I only have correction
im...

5092

By: fitz

10/31/2009 08:57PM

transform an image from galactic to c...Started by:cromanzu, 04/06/2006 05:25PM
Hi

I am trying to transform a FITS image
written in galactic coordinates
to fk5,, but not only modyfing the WCS
information, but also
remapping the pixels.
I tried to use imcctran to get the new
WCS and the rotation
but when I enter these into imlintr...

2691

By: valdes

04/06/2006 05:25PM

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

TPROJECT bug - output filenamesStarted by:raybutler, 07/30/2009 10:40AM
Hi,

I believe I have found a minor but
irritating (aren't they all?!) bug in
TPROJECT.
It does not seem to be happy with a long
filename for its output table.

E.g. in testing (script excerpt), I
found that this works:

ratio="./GOOD/klwz0408_.txt"
tpr...

1443

By: fitz

07/30/2009 10:40AM

tomultispecStarted by:kay, 10/02/2006 10:36AM
Hi

I am currently analysing STIS data and
have converted the STIS 1-D spectra from
FITS format to IRAF files using
TOMULTISPEC. Am I correct in assuming
that only columns with the wavelength
and flux will be included in the IRAF
files or can I have a ...

2305

By: valdes

10/02/2006 10:36AM

to Mr. valdesStarted by:omizzolo, 11/06/2006 09:11AM
I am working on mosaic images obtained
with the 90prime ad Kitt Peak. I
obtained an astrometric solution for one
mosaic and now i would apply this
solution to the other mosaic of the same
field. I tried to use the iraf task
mscimage to do this, using a ...

2604

By: valdes

11/06/2006 09:11AM

timing with fxcor and rvcor (and setj...Started by:sdb_mike, 06/01/2007 04:40PM
I am doing time-series spectroscopy
measuring pulsation velocities using
fxcor. As such, our timing is incredibly
important. I have 2 issues related to
this:
The txtonly output of fxcor provides
time in HJD. However, I want JD output
because then I will...

4277

By: sdb_mike

06/01/2007 04:40PM

Time stamp problemStarted by:fschweizer, 07/16/2010 10:31PM
Hi Mike,

IRAF (v2.14) on my Mac Pro XMP seems to
have a problem with time stamps
whenever some header update occurs
(e.g., in `hedit ... add+'). The
time associated with the FITS file is
then PST (standard time) instead
of PDT (daylight saving time) l...

1324

By: fschweizer

07/16/2010 10:31PM

tiltpars (fortran executable in iraf)Started by:ebubar, 09/14/2010 05:36PM
I wonder if anyone can help with this.
I am reducing some MIKE echelle spectra
using the mike_tools packages. I've
reached the point where I am correcting
for the tilt of the slit using a fortran
program called tiltpars. It is
compliled and I have li...

1155

By: ebubar

09/14/2010 05:36PM

the use of IMARITHStarted by:owen, 12/15/2007 04:44PM
Hi, all,

I know that task IMARITH can do
calculation for +, -, *, /. And now I
wonder whether it can work for something
complicated, such as log, 10^... If it
fail, is there any task which can do
that?

I haven't found the way yet. So anyone
could hel...

3224

By: fitz

12/15/2007 04:44PM

the unit of splotStarted by:haha, 11/17/2013 02:53PM
Generall the two axis of a spectrum
displayed by splot are wavlength and
flux.The y axis are like
1.15e-18,1.25e-18...

Forgive my English.After reading the
help page of splot,I am very
confused.The unit of y axis is
ergs/cm2/sec/hz or ergs/cm2/sec/...

2538

By: haha

11/20/2013 05:50AM

The trace in apallStarted by:cosmologist, 05/24/2011 07:19PM
What does the "trace" part of apall do?

In the manual I am using it says that
the reason one needs to trace is the
fact that the actual spectral line is
not prfectlly parallel to the dispersion
axis. That doesn't make much sense to me
because when I lo...

4615

By: cosmologist

05/24/2011 07:19PM

The task BVCORR is not workingStarted by:fitz, 06/18/2015 09:06PM
[color=red][Moderator's Note: Forwarded
from Story submission][/color]

I have the version 2.7.8 of RVSAO
installed (November 2009)

I can't edit nor see the parameters of
the task BCVCORR (a task included in
RVSAO to correct radial velocities)
and...

1471

By: fitz

06/18/2015 09:40PM

The syntax error: **: }Started by:cosmologist, 01/24/2011 03:40PM
Does anyone know what this syntax error
might mean?

[code:1:988210480c]
** Syntax error, line 1315
**: }
[/code:1:988210480c]

It says line 1315, but how do I know
which file is that?

1683

By: cosmologist

01/24/2011 03:40PM

The size of combined frames...Started by:bulash, 12/18/2006 11:38AM
Hi,

Does anyone encounter with the problem
that:

After combined all the frames, say
biases, the size of combined Master Bias
is become equal to 2 times of a bias
frame. e.g. if one bias has 422KB size,
the combined has 844 KB.

Is it a problem?
Becau...

2620

By: bulash

12/18/2006 11:38AM

the problem with ccdlistStarted by:hanabez, 09/17/2007 08:10AM
Dear help:
My data are from WFI of ESO'la silla.So
first I usr the task esohdr in esowfi
package.Than I examine the result with
ccdlist,but as follows:
WFI.2007-02-26T00:51:15.154.fits[im1][2142,4128][ushort][
][1][ ]:vela_6
WFI.2007-02-26T01:00:19.767...

3668

By: valdes

09/17/2007 08:10AM

The data files into tables to be plot...Started by:cosmologist, 06/25/2011 03:17AM
Hi,

Is there a way to view the .fits files
as a table with 2 columns (wavelength
and flux) for the reduced data, so that
it can easily be plotted with other
plotting programs?

Thanks!

1760

By: fitz

06/25/2011 03:17AM

The 'flux' parameter in 'transform' taskStarted by:Kimmo, 06/21/2011 09:39AM
Hi

I am using the 'transform' procedure to
correct the wavelength-curvature of
longslit spectra.
The procedure has the parameter 'flux',
which is used to control the
conservation of flux per pixel.

Our measurements are so that we are
measuring scat...

1243

By: valdes

06/21/2011 09:39AM

tfinder issuesStarted by:JoshH, 02/25/2006 04:17AM
Hello,
I was hoping someone could help me
with my tfinder problems. I have
installed tfinder and tables..
everything seemed to go smoothly during
that process. However, now I'm at the
point where I'd like to try to get a
plate solutiong and the tfi...

4470

By:

02/25/2006 04:17AM

tfinderStarted by:jessiehart, 01/27/2011 06:51PM
I'm trying to run tfinder on image
"gFIELDc2.fits" with an catalog of stars
"gFIELDc2.tab", which I created with the
mkgsctab. The .tab file looks okay when
viewed tprint, but I get the following
dialog when I attempt to run tfinder:

[code:1:b47f11d4...

2039

By: jessiehart

01/27/2011 06:51PM

Text CursorStarted by:ofwolf42, 01/21/2011 07:23PM
I've been trying to read up on text
cursors on IRAF. I want to use imexam as
part of a script and perform automated
processes on a series of images. Most
information talks about using "fscan" to
get the current position and store the
co-ordinates as var...

3387

By: ofwolf42

01/21/2011 07:23PM

Test of "display" capabilit...Started by:pskoda, 01/12/2010 01:16PM
Hi Mike,

I want to call from interactive cl
script the "display" of image onto ds9
or ximtool. If the given graphic task is
not running, I would like to either warn
the user (and reject the display
request) or run the ds9 automatically
(after asking us...

2552

By: fitz

01/12/2010 01:16PM

temden task problemStarted by:Guest, 02/14/2006 04:57PM
Hello,

I have a problem with the iraf task
temden in stsdas.analysis.nebular. The
density calculation works fine but the
temperature calculation always fails
after 2 iterations, even after trying it
with carbon I, sulfur II and nitrogen
II. Typica...

4141

By: shaw

02/14/2006 04:57PM

temden not working for C III 1906,1909Started by:janerigby, 08/12/2010 09:40PM
Can anyone tell me how to get
stsdas.analysis.nebular.temden to
compute densities from the C III ratio?
It's working fine for the [O II] and [S
II] doublets. But for C III, I get
"Density calculation failed". Key pars
below. Thanks in advance for adv...

1252

By: fitz

08/12/2010 09:40PM

telluric errorStarted by:Guest, 05/11/2006 01:03PM
IRAF Help:

I am trying to use telluric to find a
best match between star and telluric
standard. For some reason I am
getting a frustrating error:

Warning: Image header parameter not
found (EXTVER)

And then it simply drops back to
cl>....

2671

By: fitz

05/11/2006 01:03PM

tektronix problemStarted by:chris75, 03/22/2009 09:33AM
Hi,
I have a fedora 10 64bit laptop (dell
xps m1330).
I installed iraf but I have a problem:
when I use i.e. imexamine or qphot,
stdgraph doesn't open.
when I call stdgraph anole it opens.
Can someone help me? Maybe it is some
stupid problem, because I ...

1454

By: fitz

03/22/2009 09:33AM

tedit in nttoolsStarted by:weistrop, 07/11/2012 03:22AM
I'm running iraf 2.15.1a on a 64 bit
MacBook Pro and trying to use tedit in
the nttools package. When I try to add
a column using the add column command in
tedit, I can then type numerical values
into the new column. However, when I
exit tedit and the...

2591

By: fitz

07/11/2012 03:22AM

tcreate freezes when trying to runStarted by:liuyi, 07/30/2009 11:39PM
Hi everyone,

I'm an undergraduate working on a summer
research project using IRAF. I am
having some problems with making a table
using tcreate.

I tried the command on a very simple
table, so my data file looks like:

1 2 3 4 5
2 3 4 5 6

and my colu...

2066

By: liuyi

07/30/2009 11:39PM

Task telluric and renormalizationStarted by:Acrobat, 11/25/2006 11:09PM
Hi,

I am using the telluric task distributed
with IRAF and I am having a difficulty.

Everything seems to work ok, but I
obtain a corrected spectrum which is
renormalized at about 0.975 instead of
1. I'm using normalized spectra as
inputs.

What am I...

2995

By: Acrobat

11/25/2006 11:09PM

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