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specred packageStarted by:Guest, 05/24/2006 06:17PM
I am trying to do a multi-fiber
spectroscopic reduction using the
specred package. I am using a 293
fiber system and there is moderate
curvature of the spectral lines. I am
encountering a problem when
re-identifying spectral lines from my
first arc ...

2703

By: valdes

05/24/2006 06:17PM

specshift, scombine, etcStarted by:esemenko, 04/03/2007 04:48PM
Hello IRAF users!
I have three questions about spectra
processing and related applications.

First question is about tasks which
allow to perform calculation of shift of
two spectra using cross-correlation or
another method. I would like to compare
two ...

4529

By: esemenko

04/03/2007 04:48PM

spectool errorStarted by:Reba, 03/10/2008 06:00PM
Hi all,

I am new to guiapps, and I am getting an
error with spectool that I do not know
how to repair. When I attempt to run the
tutorial (so that I can learn how to use
the program) I get the following error
in spectool:

x_spectool.e: dynamic-link.h:...

2541

By: Reba

03/10/2008 06:00PM

Spectool numbs to keystrokes and xgte...Started by:sirmarcos, 05/24/2006 06:38PM
So, on MacOS X running Tiger and xgterm,
there is a reproducible problem I'm
having with spectool.

I load up a spectrum. I use the
"continuum fit spectra by curve fitting
of spectra" or whatever the words are,
which works. I then normalize the
spectr...

3109

By: valdes

05/24/2006 06:38PM

spectool.gui errorStarted by:azastro, 04/29/2007 05:10PM
Hi all.

I use iraf on Linux/FedoraCore2. I start
[b:f5e254554f]xgterm[/b:f5e254554f]
and then
[b:f5e254554f]pyraf[/b:f5e254554f]. When
I try start
[b:f5e254554f]spectool[/b:f5e254554f]
this application
is crashed with error:
--> spectool o1.fits
...

3425

By: azastro

04/29/2007 05:10PM

Spectool: Equivalent Width measuremen...Started by:keflavich, 03/31/2006 01:40AM
I've been trying to compare a few
spectra of the same object taken on
different observing nights to see if sky
subtractions varied and how they were
affected by the sensitivity functions
(they're at different wavelengths, so
they behave differently at t...

5378

By: sirmarcos

03/31/2006 01:40AM

spectraStarted by:valdes, 03/23/2006 04:02PM
[quote:1c7f7205aa][b:1c7f7205aa]From:
[/b:1c7f7205aa]"Janaka Adassuriya"
<adassuriya@accmt.ac.lk
([email]adassuriya@accmt.ac.lk[/email])>
[b:1c7f7205aa]Date: [/b:1c7f7205aa]March
21, 2006 5:50:20 AM MST
[b:1c7f7205aa]To: [/b:1c7f7205aa]"Frank
Vald...

3100

By: valdes

03/23/2006 04:02PM

Spectra extraction artifactsStarted by:schenk, 02/14/2008 06:22PM
Hi all,

I've been having some problems with
extracting some spectra lately and I'm
looking for some help. Whenever I
attempt to extract the spectra from the
reduced data, I end up getting strange
artifacts in many of them. Mostly,
these tend to make ...

1976

By: valdes

02/14/2008 06:22PM

Spectra smoothing and save it into an...Started by:delta_kuadrant, 08/05/2009 12:15AM
Dear all

I've tried to search the forum and still
not find the answer.
I want to smooth my echelle spectra and
save it into another file. what task I
should use? I've tried the 's' keystroke
on splot and use 'i' to save it into
another file. but when I...

4253

By: fitz

08/05/2009 12:15AM

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 .
...

3897

By: lsh20

04/17/2006 04:50PM

Spectral ExtractionStarted by:Guest, 03/23/2006 03:37AM
I have written to you regarding few
problems regarding "splot" but no
answer. We have another problem
regarding extracting spectra. We can
take our spectra with the arc on the
same image. In this case we can extract
the object spectra and use the arc...

2804

By: valdes

03/23/2006 03:37AM

Spectral flux calibration problemStarted by:garfield, 09/29/2008 07:07AM
Hi, we're having a problem with flux
calibration of our spectra.

When we try to follow the standard
routines described in the Users guide to
Reducing SlitSpectra with IRAF we get a
divide by zero problem, because the
telluric absorption features on the...

1687

By: valdes

09/29/2008 07:07AM

spectrophotometry with sbands or some...Started by:gmaravel, 06/11/2014 09:09PM
Hi all! I have Halpha and R imaging
(obtained with the ESO/WFI) and I want
to flux calibrate the sources we have
identified. For these we have a series
of exposures for spectrophotometric
standards. As far as the Halpha
standards I know that I have to c...

1333

By: gmaravel

06/13/2014 01:42PM

Spectroscopy - Wavelength Calibration...Started by:chewbacca, 07/17/2014 09:18PM
Hi,

I have a raw spectrum to which I want to
assign a wavelength solution (dispersion
function).
I know the standard way to do this is to
run identify on a lamp spectra to fit a
dispersion function, and then assign
such a file to the field REFSPEC1...

2858

By: valdes

07/25/2014 08:40PM

spectroscopy: does identify weigh lines?Started by:gfuresz, 05/08/2006 01:22PM
Hi,

Can one tell me if the
identify/reidentify tasks weigh the
lines or not? I have found not much
about it in the help.

The IRAF ThAr line list does not have an
"intensity" column, which would tell
what lines have high counts so therefore
more accura...

4610

By: mz79

05/08/2006 01:22PM

spectrum extraction with reference imageStarted by:vall, 10/09/2007 05:12AM
Hello,

When extracting a spectrum using a
reference image and the tracing is
turned off, the algorithm uses the same
aperture definition as for the reference
image. My question is:

Are extraction weights also applied in
case optimal extraction was use...

3379

By: vall

10/09/2007 05:12AM

spectrum fron an echelle spectrographStarted by:, 04/14/2006 06:08PM
To whom it may concern,

I am faced for the first time with a
spectrum taken with an echelle
spectrograph. As far as I can
understand, each line of the CCD image
contains a small portion of the whole
spectrum in say roughly 50-100 Angstrom
chunks. What ...

5418

By:

04/14/2006 06:08PM

speeding up nfit1dStarted by:Aquila, 11/30/2010 09:53AM
Hi

I've been using nfit1d to carry out fits
to galaxy light profiles (galprof
parameter), but I will most likely have
to carry out about 120,000 fits. Does
anyone know of how I can speed up this
process, say by telling Iraf to accept
the second iterati...

1335

By: Aquila

11/30/2010 09:53AM

splotStarted by:, 03/20/2006 12:14PM
I can't seem to get error calculations
when I fit a gaussian profile with
splot. I have set nerrsample=50 and both
sigma0 and invgain > 0. I don't get
any warning or error messages, I just
don't get any errors with the output. I
am using IRAF v2.12 w...

3488

By:

03/20/2006 12:14PM

splot 'altering' wavlength scaleStarted by:rjp0i, 11/27/2006 08:25PM
One of my users is having trouble when
using splot on some WIYN Hydra
spectra. Simply writing the spectrum out
with "i" in splot is changing
the CRVAL1 and CDELT1 values in the
header, as well as the EPOCH, HJD,
and VLSR keywords(!) and adding an
WAT...

3008

By: valdes

11/27/2006 08:25PM

splot - equivalent widthStarted by:cosmologist, 01/17/2014 07:48AM
Hi,

I often use splot with "e", to find the
equivalent width (EW) of certain
features in my spectrum, but I couldn't
find any information of how iraf
calculates this equivalent width.
Whenever I convert my spectra from .fits
files to asci files and I...

6430

By: fitz

03/12/2014 02:08PM

splot -- changing sigma0 interactivelyStarted by:chewbacca, 07/25/2014 02:14AM
Hi,

Is there a way to change sigma0
interactively in splot (when doing error
analysis), or do I have to quit splot
and change it in epar whenever my
continuum rms changes?
Thanks!

640

By: fitz

07/25/2014 04:13PM

splot and chi squredStarted by:Sparkles, 03/23/2011 03:13PM
Hi guys,

Hope everyone's well.

I modeled some spectral peaks using the
standard "d" button technique in splot.
But I really want to know how well they
fit. Is there a way to calculate say the
regression coefficient (r) ??

I seem to remember there wa...

1937

By: milena

03/23/2011 03:13PM

Splot deb lending with Gaussians - Ou...Started by:cew24, 10/03/2016 07:57PM
Deblending spectral line with SPLOT and
the "d" command, followed by using the
"f" to read in a linelist.txt file and a
"g" for the fitting

The fits are done, the center, cont.,
flux, eqw. core, gfwhm are output to
splot.log file when on exits the d...

1337

By: valdes

10/12/2016 04:57PM

splot deblending vs fitprofs Started by:chewbacca, 10/06/2014 07:29PM
Hi,

I am measuring broad spectral lines in
iraf, and the problem is that the
measurements with deblending in splot
and fitprofs do not match. I use the
same file as the input, and set the
sigma0 and invgain parameters to the
same value in both measu...

785

By: chewbacca

10/06/2014 07:29PM

SPLOT errorStarted by:rohit, 03/11/2009 02:21PM
Hi

I just installed IRAF on my new mac. The
installation went well but I have this
error when I quit SPLOT.

Unable to open parameter file
`uparm$ecesplot.par'.

I thus copied all the uparm files from
the uparm folder from the previous
machine and get...

3044

By: rohit

03/11/2009 02:21PM

splot ERROR: MWCS: dimension mismatch...Started by:jsmoker, 07/11/2012 12:54PM
Hello,

I am trying to 'splot' a reduced CRIRES
spectrum with the following version of
iraf

which cl
/scisoft/bin/cl
cl

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...

3585

By: jsmoker

07/11/2012 12:54PM

splot funny wavelength scaleStarted by:Labibah, 02/15/2011 05:06PM
Hello

I am trying to use splot to measure
equivalent widths for the optical FeII
lines in SDSS spectra. The problem is
that every time I try to splot a
spectrum I get the message:
[code:1:927efcd7c3]Warning: setting
CD2_2 to 1.[/code:1:927efcd7c3]...

3330

By: Labibah

02/15/2011 05:06PM

splot graphics and xgterm problemStarted by:ldetweil, 11/03/2009 04:29AM
I get an error message when I try to use
splot or implot
"ERROR: No entry in device capability
file (xgterm)".
I'm using pc-iraf revision 2.13 with
Ubuntu 8.04 Linux.
I've been using IRAF on this HP laptop
for 2 years without
any problems. I didn't in...

2421

By: ldetweil

11/03/2009 04:29AM

splot log filesStarted by:massey, 05/12/2012 07:13PM
A colleague asked me this, and I didn't
have a good answer for her. I suspect
this is an issue that goes beyond splot.

"'I've noticed a couple of times that if
I exit splot catastrophically, i.e. I
hit an incorrect key and have to get out
of splot and...

1891

By: fitz

05/12/2012 07:13PM

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