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RA Dec coordinates in APPHOT outputStarted by:salis, 09/25/2018 08:08PM
Hello,

I am trying to get ra and dec in the
apphot/daofind and apphot/phot outputs.
I am trying this with an image with wcs
obtained from the astrometry.net.
However, I could not manage. I used
logical in the daofind wcsout parameter.


Could you ... 		 
498 0
By: salis
09/25/2018 08:08PM
Normal Topic
PWEIGHTStarted by:Bjorgo, 07/30/2018 04:18PM
Hi all,

I am trying to run PWEIGHT and having
some difficulties. My end goal is to use
the PWEIGHT output in SPLICE and combine
some overlapping STIS Echelle orders.

For my parameters I have:

PACKAGE = ctools
TASK = pweight

intable = ... 		 
552 1
By: fitz
08/01/2018 04:38PM
Normal Topic
noao.onedspec.hirescalStarted by:ircarrascal, 08/22/2014 04:50PM
I thought this task would be included in
v2.16, which I just installed, but I
can't actually find it. See Sect. 5
here:

ftp://iraf.noao.edu/iraf/v216/v216revs.txt

Any idea what's going on or how I can
get it to work?

Thanks!

Ivan 		 
572 1
By: fitz
08/22/2014 07:46PM
Normal Topic
Help! Started by:dgulledge1, 07/23/2014 06:02PM
Hi, my name is Deborah and I'm an
undergraduate student at Austin Peay
State University, trying to teach myself
how to use IRAF.
Right now, I'm attempting to create
fringe frames, but every time I try to
run ccdproc on the fringe images I have
selected... 		 
613 1
By: fitz
07/23/2014 06:12PM
Normal Topic
Problem with eqwidthStarted by:Hawkmoon, 05/28/2019 04:57PM
Hello all,

Whenever I try to run eqwidth, I always
get an index1 and eqwidth1 of 0. Below
is my bandpass file info. and the output
when I run the task.

halpha 6500 10 none line 7000 10 none

spectrum band1 flux1 cont1
cflux1 index1... 		 
616 0
By: Hawkmoon
05/28/2019 04:57PM
Normal Topic
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! 		 
638 1
By: fitz
07/25/2014 04:13PM
Normal Topic
Problems with crfixStarted by:Francesca, 04/19/2019 09:52AM
Hi,

I am trying to use crfix to remove
cosmic rays from 2D spectra.
For each spectrum, I have created a
cosmic ray mask (.pl), using the
imcombine task, providing the name of
the output rejmask.
The masks created by imcombine look
fine, since whe... 		 
646 0
By: Francesca
04/19/2019 09:52AM
Normal Topic
Accessing images using URLs in IRAF w...Started by:abraham, 10/08/2018 04:39PM
Hi - I'd like to access some images in
IRAF using a URL, which I believe is now
a built-in capability of IRAF 2.16. In
particular, I'd like to do things such
as those shown in this interesting video
put up on YouTube by the USVAO folks:

https://www.y... 		 
672 0
By: abraham
10/08/2018 04:39PM
Normal Topic
writing an IRAF taskStarted by:saumya, 03/04/2014 04:15PM
Hi guys !!! Wassuup !!!

I need to write an IRAF task. I am
clueless. Please help me. I am
explaining the problem below-

Let us have a fits image where all the
counts in pixel boxes are zero. Now, I
need to assign values (real or integer)
to differ... 		 
675 0
By: saumya
03/04/2014 04:15PM
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... 		 
677 0
By: chewbacca
08/27/2014 07:51PM
Normal Topic
center doesn't write text file in outputStarted by:le.davide, 10/22/2013 10:50PM
Hi,
all of a sudden the IRAF task
noao.digiphot.apphot.center doesn't
write the text file in output when I run
it in non-interactive mode.
If I run in interactive mode and I ask
to "write and quit", then it works.
Any idea about what do I have to cha... 		 
680 2
By: fitz
10/22/2013 11:07PM
Normal Topic
merging Started by:giannicatanzaro, 10/16/2014 09:58AM
dear all

I have this question: how do I can merge
all the orders of an echelle spectrum in
a single spectrum?

thanks

Gianni
 
681 1
By: fitz
10/16/2014 10:46PM
Normal Topic
how to distinguish the slit image in ...Started by:haha, 11/29/2013 03:25PM
Please check the image below.
http://www.lco.cl/draft/the-wfccd-in-multi-grism-mode/images/wfccd_quick_look_tool.gif

There are many telluric lines in the
image,but one of them should be the
image of the slit.How to find it?
If I have got the spectr... 		 
694 0
By: haha
11/29/2013 03:25PM
Normal Topic
Ellipse: Mag_lerr and Mag_uerrStarted by:michgradstudent, 06/23/2016 01:45PM
Doe anyone know what the values MAG_LERR
and MAG_UERR in the ellipse output file
represent?
They seem rather small, so I thought
maybe that they represent the fraction
of MAG which the upper and lower limits
are.
e.g. MAG = 21.1 MAG_LERR = 0.0108 ... 		 
697 0
By: michgradstudent
06/23/2016 01:45PM
Normal Topic
External packagesStarted by:fabvitali, 11/09/2018 04:39PM
Hi, I have recently installed IRAF
V2.16.1 on my MacBookPro 2017 (Mojave
10.14) but I can't install external
packages. When I run ./configure from my
IRAF/extern directory, it get stuck on
"Initializing repository data ....". I
see on the pkgrepo that t... 		 
702 0
By: fabvitali
11/09/2018 04:39PM
Normal Topic
DISPCOR ProblemStarted by:fitz, 09/05/2018 04:16PM
[color=darkred][Moderator's Note:
Forwarded from story
submission][/color]

First of all, I'm new leaner in Iraf.
and I have a problem I need your help to
show me where i did the mistake. I wrote


cl> depar dispcor input
file:NGC_U7000.fits
outpu... 		 
716 0
By: fitz
09/05/2018 04:16PM
Normal Topic
Deblending with splot -- fixing wavel...Started by:chewbacca, 08/03/2014 08:47AM
In fitting multiple Gaussian profiles in
splot or fitprofs, is there a way to fix
one center wavelength and let the others
vary? There appears to be only the
options of fixing all wavelengths,
shifting all wavelengths or letting all
wavelengths vary....... 		 
737 1
By: fitz
08/03/2014 07:32PM
Normal Topic
Format of the "id" files from the ide...Started by:Mike Potter, 11/10/2016 04:12PM
In the "id" file that is output by the
identify task (ex: kpnoslit.identify)
there is a table that has the pixel and
wavelength values entered by the user
during line identification. There is
another wavelength value shown as well,
which I'm assuming i... 		 
740 1
By: fitz
11/10/2016 04:58PM
Normal Topic
apall routine is not extracting the w...Started by:jadiazt, 02/09/2015 10:11PM
Dear,

Hello, I am having the following
problem, I am trying to get a
1-dimensional spectrum from a
2-dimensional spectrum, already
calibrated by wavelength. The issue
comes that the routine apall is not
extracting the whole spectrum. It only
extracts... 		 
742 0
By: jadiazt
02/09/2015 10:11PM
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 ... 		 
742 0
By: chewbacca
08/17/2014 11:50AM
Normal Topic
Overscan regionsStarted by:rrbernardi, 06/27/2016 12:33AM
I am working with a image
(1:1026,1:4645) which uses two vertical
regions ([1:27,1:4616] and
[1180:1206,1:4616]) and one horizontal
region [27:1152,4617:4645] as overscan.
Can I include two overscan regions
(vertical) in BIASSEC parameter? What is
the c... 		 
746 0
By: rrbernardi
06/27/2016 12:33AM
Normal Topic
simultaneous fit to multiple arclampsStarted by:lucy1023, 05/24/2015 10:44PM
Is there a way to get IRAF to fit
multiple different arclamps
simultaneously, without adding the
arclamps together (which would lead to
some blending)? e.g., say I'd like
Identify to find all the features in a
HgNe lamp, then separately find all the
fea... 		 
768 1
By: lucy1023
05/24/2015 11:19PM
Normal Topic
Wavelength solution troublesStarted by:jeanm12, 10/29/2013 01:53AM
Hello,

I have lots of echelle data that I am in
the process of reducing. I have gone
through and used ecidentify to obtain an
accurate wavelength solution from one
night's data that I am using as the
basis for the rest of my nights. I then
have run e... 		 
773 0
By: jeanm12
10/29/2013 01:53AM
Normal Topic
2D Spectrum AlignStarted by:netoph, 11/03/2013 03:06AM
Hi there.

Just a simple question How can I align a
2D Spectrum image with an other 2D
Spectrum image?. Is there a package that
find the centroid of the star or galaxy
for align the image?.

Also how can I correct the shifts made
by the move of the... 		 
781 0
By: netoph
11/03/2013 03:06AM
Normal Topic
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... 		 
783 0
By: chewbacca
10/06/2014 07:29PM
Normal Topic
using irmfringeStarted by:Zeleke Amado, 08/20/2018 12:29PM
Dear
I had a data consisting of .fits images
taken using GTC 10m telescope. I have
done the preliminary reduction (flat
fielding and bias subtraction). But my
data is highly affected with fringing
problem. For removing this effect I have
reallized to a... 		 
799 0
By: Zeleke Amado
08/20/2018 12:29PM
Normal Topic
Problem with gsflatStarted by:Eskol_Valentine, 06/13/2015 06:16PM
Hi, I have the last version of gemini
(with Ureka), but I'm a little
complicated with the task gsflat. Two
days ago, I was able work with my
standard, but yesterday I wanted to
continue with the galaxy, but I got this
error:

-------------------------... 		 
800 1
By: fitz
06/15/2015 08:59PM
Normal Topic
Extracting lambda-flux values of fitt...Started by:Francesca, 10/15/2014 11:55AM
Hi,

I am fitting some spectral lines with
the deblend option in the splot iraf
task. Once the fit has been done, I
would like to save, together with the
fit parameters (e.g. FWHM,flux, etc,
which I get in the splot.log file), also
the "wavelength-flu... 		 
801 0
By: Francesca
10/15/2014 11:55AM
Normal Topic
How to use Reidentify and fitcoordsStarted by:kirankumar, 09/17/2015 02:45PM
Hi All,

I am trying to reduce longslit spectral
data. I am new to it.

I used combine task to combine Flat
Frames to create MasterFlat and Arc
Frame to create MasterArc. I want to use
identify, reidentify, and fitcoord
tasks.

I placed NodA and ... 		 
803 0
By: kirankumar
09/17/2015 02:45PM
Normal Topic
patterns found in lacos_spec's results Started by:haha, 05/14/2018 12:31PM
I used lacos_spec to remove cosmic rays
like below.
[code]lacos_spec input=a output=b
outmask=amask gain=0.95 readn=3.5
objlim=5 yorder=5 xorder=0[/code]

The result is like the attached image.
Patterns can be found in both the result
image and
the... 		 
804 0
By: haha
05/14/2018 12:31PM
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