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Last Post

splot signal to noiseStarted by:milena, 05/18/2011 04:34PM
hey,

I noticed that it is possible to get a
wavelength dependent plot of the signal
to noise if I have a spectrum that is
extracted with apall and wavelength
calibrated. To get it I have to plot
image band 4 with splot. If I do it with
my spectra, it d...

1815

By: valdes

05/18/2011 04:34PM

standard task...Started by:Jason Quinn, 05/05/2011 10:28PM
When running the standard task in
command mode (I use the kpnoslit one),
if "interact=yes" and the output is
rather ugly because it's missing
newlines in key spots.

For instance, with an image with two
apertures,

[code:1:7ab90b5beb]standard
("...

1913

By: valdes

05/05/2011 10:28PM

msccmd and imcombineStarted by:hartigan, 04/20/2011 04:09PM
Hi,

Does msccmd work with imcombine? I tried

msccmd "imcombine $input tmp
combine=median"
input="sky70,sky71,sky72"

but it tried to median filter
sky70[1],sky70[2] etc. instead of taking
sky70[1],sky71[1],sky72[1] and put them
into tmp[1].

I can do ...

1595

By: valdes

04/20/2011 04:09PM

problems with IRAF 2.15 using DOSLITStarted by:uhiller, 03/23/2011 03:59PM
Hi,

the task doslit (in noao.imred.specred)
in iraf 2.15a does not work anymore.
It's supposed to give me an interactive
window to select the aperture to extract
the spectrum for.

doslit only updates the file with adding
a "CCDPROC" keyword (that's no...

1470

By: fitz

03/23/2011 03:59PM

Subtraction of stars with saturated p...Started by:DShields, 03/16/2011 10:43PM
I am attempting to remove stars from an
image using the DAOPHOT package.
Specifically, I have stars with
saturated pixels overlaying the image of
a galaxy. I want the galaxy to remain
but the stars subtracted out.

My analysis procedure includes the f...

1981

By: valdes

03/16/2011 10:43PM

combining spectra taken months apart:...Started by:westmoquette, 03/08/2011 05:16PM
I have a set of IFU observations taken
at the same coords and spectrograph
setup, but ~two years apart. Before I
can co-add them, I need to correct for
the different geocentric velocities at
the time of observations - i.e. correct
to the heliocentric ve...

3134

By: valdes

03/08/2011 05:16PM

question - DATAMINStarted by:szalaitom, 03/08/2011 09:49AM
Hi,

I have a problem with the apphot/phot
package. I would like to carry
out aperture photometry on some
template-subtracted images. I only
need the flux value within the given
aperture radius, without any sky
subtraction (to reduce the possible
contam...

1559

By: valdes

03/08/2011 09:49AM

.snapStarted by:tonetty, 03/05/2011 04:23PM
I must request again your help...
I posted last year a question about my
HP F-4280 all-in-one not working with my

iraf 2.14 running on a UBUNTU 10.4
platform...

No one of the suggestions made was
successfull...

Can anybody help me?

I think that th...

1733

By: fitz

03/05/2011 04:23PM

Problem with dispcorStarted by:danunited, 02/28/2011 11:53AM
Hi
Just wondering if anyone could help me
here.
Im having a problem with dispcor.
Im going into epar dispcor.
Im getting an error:

ERROR: DISPCOR : Echelle dispersion
function not found (database/eclampspec)

in the parameter for defining where the
dis...

1980

By: valdes

02/28/2011 11:53AM

problem with darkcombineStarted by:cosmologist, 02/26/2011 08:16PM
I don't know why I have this problem
with darkcombine:

[code:1:e9da53a770]

epar darkcombine

input = dark* List of
dark images to combine
(output = Darkn1)
Output dark image root name
(combine= ...

1813

By: AnTaR3s

02/26/2011 08:16PM

Phot with lists HelpStarted by:astrojake, 02/23/2011 05:40AM
Hello,
I'm doing aperture photometry with phot
on iraf. I want to do the following:

phot <images> <coordfile>
fwhm=<""> ann=<"">
dann=<""> aper=<"">

I know it is possible to do this with a
list of images with ll the...

1360

By: fitz

02/23/2011 05:40AM

ccmap/xy2sky problemsStarted by:jtg0819, 02/22/2011 06:42PM
I am doing photometry on 90-300 stars
per frame. My intent was to use the
ccmap/xy2sky packages to create a
coordinate list of these stars and then
use those coordinates to match my stars
to themselves in the USNO database.
After painstakingly creating ...

1386

By: valdes

02/22/2011 06:42PM

hselect bug...!?Started by:AnTaR3s, 02/15/2011 05:10PM
Hi

I just wanted to sort my CCD data by
filter, with an old script.
It uses lines like this:

hselect *.fits $I "FILTER='B'"

which prints only the names of the
Images where the keyword FILTER equals
B.
This works on my Ubuntu 32bit Machine
(IRAF v2.15...

1162

By: fitz

02/15/2011 05:10PM

Request for more splot input validati...Started by:Jason Quinn, 02/15/2011 02:55PM
Splot seems to do only very weak
validation of input for the "line" and
"band" parameters. In particular, the
user can enter values that far exceed
the actual upper limit for line or band
for a given image. Could this be
improved? Is there a reason why ...

1319

By: valdes

02/15/2011 02:55PM

small correlation height of fxcorStarted by:vega, 02/11/2011 07:16AM
Hi Fitz,

I'm Vega. My currently work is to
measure the radial velocity of variable
stars. I found that fxcor task has been
widely used to measure the 'rv' of
celestial objects. The objects that I
working on are the stars which have
emission lines like ...

2586

By: vega

02/11/2011 07:16AM

Replacing cosmic raysStarted by:maineguy, 02/09/2011 05:14PM
I'm trying to add two images while
removing cosmic rays in the process. If
I use crreject in imcombine in IMAGES
the pixels in the final image will only
have half the pixel value as the
surrounding pixels if there was a cosmic
ray in one of the images ...

1540

By: maineguy

02/09/2011 05:14PM

Problem with Image CursorStarted by:makhlaghi, 02/09/2011 03:58AM
Hi,
I am using a 64bit Fedora 14, with 64bit
IRAF 2.15.1, I am totally new to IRAF
and I was running some sample
instructions to learn the tasks, my
graphics cursor works fine, for tasks
like "implot" or "contour" but all the
tasks, most notably "imexam...

1772

By: fitz

02/09/2011 03:58AM

how to convert pixel coordinates to w...Started by:Nils, 02/08/2011 09:49PM
I need to know the accurate position of
an object. I used 'imcentroid' to get
the pixel coordinates. How do I get the
wcs coordinates? The image is calibrated
astronomically.

2203

By: fitz

02/08/2011 09:49PM

calibrationStarted by:Jiang, 02/07/2011 05:37AM
Hi, I am using an iraf script to do the
spectrum data reduction.
When combining the bias, I met a error
like this:
******************************************************************
Displaying combined bias frame...
z1=-6.699097 z2=20.57361
ERROR on li...

1434

By: fitz

02/07/2011 05:37AM

Gemini external package installationStarted by:drupke, 02/04/2011 08:53PM
Hello Mike,

Just a comment that I installed the
Gemini external package through the new
package-installation script. However,
the Gemini package uses the old
convention for binary architecture
labels, so my binaries didn't work
right. In other words,...

1398

By: fitz

02/04/2011 08:53PM

Apscatter for long-slit spectroscopyStarted by:jchavez, 01/28/2011 08:03PM
Hi,

I would like to subtract scattered light
across the dispersion (not necessarily
[i:79ec690410]along[/i:79ec690410] the
disperson, although that wouldn't hurt).
I have 3 stars in the slit. When I
extracted the spectra, I got 3
apertures.

I'm tr...

1509

By: valdes

01/28/2011 08:03PM

fortran iraf on mac os x 10.6.6Started by:vmagalhaes, 01/28/2011 12:53PM
I`m having a problem on running a imfort
based task, on iraf
when the program calls clnargs it stops
whitout any error flag.

does anyone knows how to solve this
problem?

1289

By: fitz

01/28/2011 12:53PM

how well does geotran preserve the fl...Started by:rdcschan, 01/21/2011 07:52AM
Dear Iraf experts,

Hi, I am trying to compare the flux
levels of two images of a galaxy taking
with different instruments (WIYN and
HST), that's why I need to transform one
image to align with another one. I
already considered fllter responses and
t...

1299

By: fitz

01/21/2011 07:52AM

Sensfunc: ERROR: No degrees of freedomStarted by:jtello, 01/20/2011 10:15PM
I have problems with sensfunc. When I
run sensfunc, I got the following
message:

>sensfunc
Input standard star data file (from
STANDARD) (std): std
Output root sensitivity function
imagename (sens): sens
ERROR: No degrees of freedom

Here my std f...

3118

By: valdes

01/20/2011 10:15PM

How to add/modify header keywords?Started by:le.davide, 01/05/2011 05:04AM
Hi all,
to use Galfit I need to have few
keywords in the image header (like GAIN
or ATODGAIN, RDNOISE, NCOMBINE). These
seems not to be present in the header.
How can I add them? (Or, if they are
called differently, how can I change the
keyword?).
Thanks.

3376

By: fitz

01/05/2011 05:04AM

how to use tcreate with x_ttools fro...Started by:fjjames, 01/04/2011 03:08AM
I need to create a table from the
command line.
From the >cl prompt, I can issue
tcreate table cdfile datafile, where
table is the output file, and cdfile and
datafine are input files, and everything
works.

However, I need to do this outside of
iraf...

1662

By: fitz

01/04/2011 03:08AM

msccmatch at noao 950 N Cherry itselfStarted by:Edward Olszewski, 12/21/2010 04:02AM
Frank and Mike,
I'm using Abi Saha's console MAC
computer to run msccmatch (and other
things)
on several nights of Mosaic2 data. I'm
running into a couple of related
problems.
First, in mscgetcatalog, using the
default NOAO:USNO-A2, there are no
stored ...

1463

By: valdes

12/21/2010 04:02AM

mscred ccdproc won't see myStarted by:kanaan, 11/30/2010 06:53PM
I am running
PyRAF 1.8.2 Copyright (c) 2002 AURA
Python 2.6.5 Copyright (c) 2001-2010
Python Software Foundation.
NOAO/IRAFNET PC-IRAF Revision 2.14.1
Mon Sep 15 10:12:05 MST 2008
This is the RELEASED version of IRAF
V2.14 supporting PC systems...

2019

By: travisrector

11/30/2010 06:53PM

Truncate Fits HeaderStarted by:AnTaR3s, 11/30/2010 02:43PM
Hi

In order to make a program work, I need
to truncate the fits header. For that I
need to know how many bits I have to cut
off the original fits-file.
Any idea how I can find that out? I
thought vi or emac might do that, but
how?

cheers

1108

By: fitz

11/30/2010 02:43PM

Vogit. lorentzian & Guassian FWHMStarted by:Sparkles, 11/17/2010 08:06PM
Hi guys,

so I'm trying to model some spectra and
using the interactive "d" key in splot
to do it. plan is then to use the
resulting FWHM and convert to a
velocity. However when using a vogit you
get two FWHM one for the lorentizan and
on e for the guas...

2165

By: fitz

11/17/2010 08:06PM

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