Welcome to iraf.net Sunday, May 12 2024 @ 04:43 AM GMT

 Forum Index > Help Desk > Applications New Topic
First | Previous | 39 40 41 42 43 44 45 | Next | Last
 
Topic Subject
 		 Views
 		 Replies
 		 Last Post
 
Normal Topic
S/N per pixel spectrumStarted by:paulartcoelho, 10/17/2006 07:08PM
hi there,

this should be obvious, but i confess
i'm confused.

i extracted a longslit spectrum using
apall, and did variance weighting,
extracting the extras spectra (raw,
background and sigma).

i need to obtain a kind of "S/N per
pixel spectrum as a... 		 
10398 4
By: ozbasturk
10/17/2006 07:08PM
Normal Topic
Saludos desde Colombia!Started by:Guest, 10/11/2005 11:11PM
Estimados amigos
Reciban un muy cordial saludo de mi
parte. Yo soy estudiante de física y me
encuentro en este momento realizando un
trabajo de astrofísica campo en el cual
voy a especializarme.
Estuve realizando los primeros calculos
de mi trabajo ... 		 
4090 1
By: Guest
10/11/2005 11:11PM
Normal Topic
SAOImage DS9 version 7.4 is now avail...Started by:joye, 12/21/2015 09:08PM
SAOImage DS9 version 7.4 is now
available for download at
http://ds9.si.edu/site/Download.html .
New features include Blocking, 3D Axes
Reorder, and Performance Improvements. 		 
1221 0
By: joye
12/21/2015 09:08PM
Normal Topic
SAOImage DS9 version 7.5 is now avail...Started by:joye, 12/29/2016 05:54PM
SAOImage DS9 version 7.5 is now
available for download at
http://ds9.si.edu/site/Download.html

New features

New Preference file support- allows
multiple preference files base on
version number
Improved CIAO regions file
compatibility
Improved FI... 		 
1338 0
By: joye
12/29/2016 05:54PM
Normal Topic
saturated stars and DAOPHOT PEAK taskStarted by:vall, 05/22/2012 09:09AM
Hello.

I am puzzled by the behavior of the
DAOPHOT PEAK task. It seems that it
tries to fit stars that are saturated
and even measures their magnitudes. I
have set the saturation limit
("daopars.datamax") correctly. PHOT
gives INDEF for the saturated... 		 
1800 0
By: vall
05/22/2012 09:09AM
Normal Topic
Saving color images with tvmark markingsStarted by:Guest, 06/12/2006 12:46PM
Dear Sir,

I am using the IRAF/tvmark task to mark
a few objects with different
colors. When giving this task an output
file the image is saved but, the
color markings are converted to
grayscale.
Is there a way to save the image with
the actual markings... 		 
2345 1
By: fitz
06/12/2006 12:46PM
Normal Topic
Saving WREGISTER database?Started by:aoxsic, 09/16/2008 03:52PM
Hello,

is it possible to save the
transformations database that wregister
creates while it runs? It seems to
unnecessarily clean up after itself but
I need that database to apply it on
coordinate lists with geoxytran. So, how
do I save the database?

T... 		 
1962 2
By: fitz
09/16/2008 03:52PM
Normal Topic
SBIG Images in IrafStarted by:nwj781, 07/21/2009 03:32PM
Hello,

I was recently given the task of
reducing a bunch of SBIG format images
(STV?). Is there an iraf tool to convert
them to fits? Is there a non-iraf
conversion tool that works for linux?

Thank you,
Neil 		 
1404 1
By: fitz
07/21/2009 03:32PM
Normal Topic
scale in ZerocombineStarted by:cosmologist, 02/21/2011 06:38PM
I am looking in the help page for
zerocombine, and I have a question about
the "scale" option:

scale = "none"
(none|mode|median|mean|exposure)
Multiplicative image scaling to be
applied. The choices are none, scale by
the mode, median, or mean of t... 		 
3352 6
By: AnTaR3s
02/21/2011 06:38PM
Normal Topic
scaling and weighting in IMCOMBINEStarted by:ovince, 06/26/2021 08:17AM
Dear All,

I would like to ask a few things about
IMCOMBINE, COMBINE, FLATCOMBINE tasks.

- I noticed that IMCOMBINE performs
scaling differently than COMBINE and
FLATCOMBINE. Why is it so?

- Why is it not possible to set the
'weight' parameter... 		 
1528 1
By: valdes
07/19/2021 11:19PM
Normal Topic
scombine and odcombine -- sum versus ...Started by:jkwerk, 02/07/2008 05:15AM
Hello,

When combining 3 different spectra of
the the same object (scombine or
odcombine), the (summed/averaged -- it
doesn't matter) output "combined"
spectrum looks basically exactly the
same as just ONE of the input spectra
(i.e. same noise and s... 		 
2423 1
By: valdes
02/07/2008 05:15AM
Normal Topic
Scombine changes dimensionStarted by:rohit, 03/31/2010 11:25PM
I have two sets of two files which I
combine to create two individual files.
I have been using SCOMBINE task for
this. It has worked for most expect
this. I do not understand why the task
is changing the dimensions. Here is what
the imeader command give... 		 
1332 1
By: fitz
03/31/2010 11:25PM
Normal Topic
Scombine ERROR: floating point invali...Started by:morrisonss, 04/19/2013 02:26PM
I tried running the task scombine using
the command:
[code:1:f1c3c227be]scombine
input=*_H*L_2.fits
output=TXS0827_HL_2.fits w1=
3776892.899268 dw=8.713374e-01
combine=average
reject=none[/code:1:f1c3c227be]

When I do I get the error:

[code:1:f1c3c227... 		 
4052 6
By: morrisonss
04/19/2013 02:26PM
Normal Topic
scombine missing in 2.12.2a hydra and...Started by:massey, 09/19/2006 03:58AM
Hi, Mike, Frank, etc---

I'm having a very peculiar problem
running dohydra on my Mac. I can't
swear that I've done this before.
Anyway, everything seems fine until it I
do the sky rejection. Then I get an
error message saying it can't find
scombine.... 		 
3457 2
By: massey
09/19/2006 03:58AM
Normal Topic
scombine of different aperaturesStarted by:massey, 06/15/2009 05:46PM
I have various "ms" images that contain
multiple apertures all of the same
object,
and I'd now like to scombine them. But,
scombine is very keen to do the
combining aperture by aperture. How do
I get around this?

In other words, I'd like to run scomb... 		 
1455 1
By: massey
06/15/2009 05:46PM
Normal Topic
scombine with local snr weightStarted by:chewbacca, 08/17/2014 11:50AM
Is there a way to use scombine with the
weights in the overlap regions being the
local snr (signal to noise ratio)?

This is a fairly standard use and it
seems scombine doesn't support it...
what is the easiest way to do this in
iraf? I have a fairly ... 		 
744 0
By: chewbacca
08/17/2014 11:50AM
Normal Topic
scopyStarted by:Guest, 07/16/2009 07:26PM
Hi

I am trying to extract a single spectrum
from multi-spectrum(.ms.fits)
files using scopy. My data consists of
300 multi-spectrum aperture fits
files. Each aperture contains the
following: sky-subtracted spectrum,
non-sky-subtracted spectrum and... 		 
3320 1
By: rohit
07/16/2009 07:26PM
Normal Topic
scopy: wavelength range problemStarted by:chewbacca, 08/27/2014 07:51PM
I am using scopy to copy portion of a
spectra with starting and ending
wavelengths w1 and w2. The rebin
parameter is set to yes, so I would
expect w1 and w2 to be exact (the
spectra covers a region well beyond w1
and w2).

However, in some cases scop... 		 
679 0
By: chewbacca
08/27/2014 07:51PM
Normal Topic
Script Question Reading and editing h...Started by:sebastian, 07/23/2009 03:43AM
Hi, I'm having troubles writing a
script. The aim is to read a file with
numbers
to be added as parameters via hedit on a
list of images.
e.g

Part of the code:
[code:1:2da6262d5f]
list="input"
#file with n... 		 
2595 4
By: sebastian
07/23/2009 03:43AM
Normal Topic
Script using imsurfitStarted by:Gordon, 04/09/2009 11:29PM
Hi,

I am trying to use imsurfit to fit a
plane to data within a circular region
of an image. Right now I have

imsurfit(infile, outfile, 2, 2,
cross_terms="no", type_output="fit",
region="circle", circle=?)

The x and y coordinates and the radius
of t... 		 
2177 2
By: Gordon
04/09/2009 11:29PM
Normal Topic
scripts and stringsStarted by:, 11/12/2008 07:12AM
Hello everybody out there

Question # 1
I got a list of binary tables to be
converted to iraf fits images. I've
written the procedure script, tab2spec
(infile, outfile) which is modified from
Dr. Jerry Kriss' website. The first
lines are

procedure tab2... 		 
3481 7
By:
11/12/2008 07:12AM
Normal Topic
Scrutinizing spectra within fxcorStarted by:swortel, 05/17/2007 03:07PM
I am crosscorrelating spectra with fxcor
to determine RV shifts for absorption
lines. The spectra are from echelle
observations. Each spectrum is the
concatenation of all the echelle orders,
and is therefore extremely long. (Each
spectrum is about 320... 		 
2905 1
By: fitz
05/17/2007 03:07PM
Normal Topic
SDSS catalogs in astcatStarted by:vall, 03/23/2010 11:42PM
Hello,

I have a simple question. Is it possible
to access the SDSS catalogs from the
ASTCAT package and if yes, what changes
should be made to the relevant database
files? I would like to be able to access
the images, as well as the photometric
and ast... 		 
1633 2
By: vall
03/23/2010 11:42PM
Normal Topic
Seeing the algorithm of an IRAF programStarted by:rohit, 10/02/2007 08:51PM
Thanks Fitz for your help in the
previous question.

I would like to know how I could find
the code written for a particular IRAF
task. That is, how FXCOR task is
written, that is see the code.

Please let me know.

Thanks! 		 
3476 3
By: fitz
10/02/2007 08:51PM
Normal Topic
Segmentation fault errorStarted by:sarvin, 01/17/2008 06:13PM
Dear All,

I get the error of: Segmentation fault
as I try to run my code compiled with
"ifort" Does anybody know what the
problem is?

Thanks in advance!
Sarvin 		 
2588 3
By: fitz
01/17/2008 06:13PM
Normal Topic
Segmentation violation from SCOMBINEStarted by:drupke, 11/30/2010 10:02PM
I am trying to combine some spectra, and
I am getting unpredictable results,
sometimes with "segmentation
violations," sometimes not. For
instance, the first of the following
commands works, but not the second:

ecl> scombine
1xtrno04,1xtrno05,1xtrn... 		 
2690 6
By: fitz
11/30/2010 10:02PM
Normal Topic
segmentation violation in fitparamsStarted by:massey, 08/22/2016 07:14PM
I'm using fitparams,using 2.16.1 EXPORT
on a Mac and I'm getting a segmentation
violation. Here are my parameters:
observat= standobs List of
observations files
catalogs= nlandolt List of
standard catalog files
config = ... 		 
1349 2
By: massey
08/22/2016 08:18PM
Normal Topic
SENSFUNCStarted by:cosmologist, 07/27/2009 06:14PM
When I run SENSFUNC to my fits files, I
don't get any file starting with 'sens'
as expected. I read the help page, but I
couldn't figure out the problem, any
idea? :!: 		 
1522 1
By: fitz
07/27/2009 06:14PM
Normal Topic
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... 		 
3110 1
By: valdes
01/20/2011 10:15PM
Normal Topic
Sensfunc: how is it defined?Started by:westra, 03/14/2006 08:00AM
I have several standard stars taken on
different nights, but all with the same
instrument. First of all, when I go
through the whole reduction, I get in
the procedure
[code:1:9b01b1698b]sensfunc[/code:1:9b01b1698b]
that the stars are not on the same
mag... 		 
6762 4
By: westra
03/14/2006 08:00AM
First | Previous | 39 40 41 42 43 44 45 | Next | Last

Normal Topic Normal Topic
Sticky Topic Sticky Topic
Locked Topic Locked Topic
New Post New Post
Sticky Topic W/ New Post Sticky Topic W/ New Post
Locked Topic W/ New Post Locked Topic W/ New Post
View Anonymous Posts 
Anonymous users can post 
Filtered HTML Allowed 
Censored Content 
dog allergies remedies cialis 20 mg chilblain remedies
Privacy Policy
Terms of Use

Forum Menu

User Functions

Login
Don't have an account yet? Sign up as a New User
Lost your password?

Topics