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Problem with residual fitting in ecid...Started by:conor, 05/19/2006 03:05PM
Hi,

I'm relatively new to IRAF, but I'm
having a problem while calbrating the
dispersion of an echelle spectrum. When
identifying lines with ecidentify, I
type 'f' to get the residual vs
wavelength window. However when I try to
return to the spectrum I... 		 
2630 1
By: valdes
05/19/2006 03:05PM
Normal Topic
Fwd: IdentifyStarted by:fitz, 05/18/2006 11:38PM
[Mod Note: Moved from story comment on
behalf of khanna]


Hi!

I am trying to use identify to trace
along horizontal lines in a lunar
spectra to unbend them.

Can I use pixel coordinates to do this?
What should my line list look like? How
do I know tha... 		 
3386 3
By: valdes
05/18/2006 11:38PM
Normal Topic
extractig aperturesStarted by:Guest, 05/18/2006 07:56PM
Dear Iraf Help team,

I am an experienced user of stectra
software but I find myself unable to
solve the following problem.

I have echelle observations where the
star was out of focus. As a result,
a cut perpendicular to the dispersion
direction show... 		 
2377 1
By: valdes
05/18/2006 07:56PM
Normal Topic
DS9 command lineStarted by:ovince, 05/18/2006 06:44AM
Hi All,

I would like to lunch DS9 with 2 images
to have in the same time for analysis
using command line. Could somebody help
me with this

Thanks
Oliver 		 
4141 2
By: ovince
05/18/2006 06:44AM
Normal Topic
DOPCOR with multispec .fits framesStarted by:Matthew Walker, 05/18/2006 02:10AM
I am concerned about whether DOPCOR
adequately keeps track of subsequent
velocity shifts to different apertures
in a multispectrum frame. I am working
with multispectrum .fits frames from the
Magellan fiber spectrograph. I need to
use DOPCOR to apply ... 		 
2760 1
By: valdes
05/18/2006 02:10AM
Normal Topic
pdm/graphics bug?Started by:massey, 05/17/2006 10:03PM
Mike,

I've encountered something that might be
a general bug in graphics, or maybe not.
The specifics of what I'm doing is
running the astutil task "pdm" to obtain
a periodogram (significance vs frequency
plot) for some light-curve data.
Because the ... 		 
3433 1
By: fitz
05/17/2006 10:03PM
Normal Topic
polyphotStarted by:Josh, 05/16/2006 03:58PM
Hi all...

I'm having a bit of difficulty with
polyphot.

I'm using it in such a way that I
already have a polygon defined in a
file, e.g. sourcename.pol and I have the
center of the source defined as
sourcename.coo, so that when I enter the
polyphot co... 		 
6322 8
By: Josh
05/16/2006 03:58PM
Normal Topic
ds9Started by:huh?, 05/15/2006 09:10PM
Hi all,

I am new to IRAF and need to do some
data reduction.

I'd like to display my images using ds9
but I don't know how to launch it.

When I type ds9 & in the cl> it
reads: no display name and no $DISPLAY
environment variable.

So how do I r... 		 
4383 3
By: huh?
05/15/2006 09:10PM
Normal Topic
appending to a metaplot file in stsda...Started by:massey, 05/15/2006 08:54PM
Maybe this is a question for the boys
& girls at STScI, but my reading of
the
"igi" help pages makes me suspect that
whoever wrote this was just unfamiliar
with iraf command syntax. (They were
certainly unfamiliar with how to
construct a useful help... 		 
3770 2
By: massey
05/15/2006 08:54PM
Normal Topic
dohydra on linux RHEL3 does not workStarted by:dfadda, 05/14/2006 07:13PM
I'm trying to run the Hydra pipeline
(noao/imred/hydra) on my linux laptop
(Thinkpad T3, 1GB RAM, Redhat Linux
Entreprise 3).
The versions of IRAF that I tried are:
2.12.2 with patch2a and the last
beta version 2.13 beta2. Everything
(like displaying, c... 		 
6382 7
By: dfadda
05/14/2006 07:13PM
Normal Topic
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>.... 		 
2678 1
By: fitz
05/11/2006 01:03PM
Normal Topic
how to access a specific aperture ins...Started by:paulartcoelho, 05/10/2006 10:11PM
hello,

i'm using cfitsio library to write a
fits file: it contains an empty primary
array (only header, no pixel) plus many
image extensions. each image extension
is an equispec spectrum with 4
apertures. by now i managed to write the
file and everythi... 		 
2884 1
By: valdes
05/10/2006 10:11PM
Normal Topic
disptrans : Image header parameter no...Started by:paulartcoelho, 05/08/2006 07:37PM
hello,

i'm trying to use disptrans to transform
an SDSS spectrum from vaccum to air
wavelength but i get

onedspec> disptrans sloanstar1
sloanstar1air angstroms air=vac2air
Warning: Image header parameter not
found (EXTVER)

I read in another foru... 		 
5037 1
By: paulartcoelho
05/08/2006 07:37PM
Normal Topic
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... 		 
4612 4
By: mz79
05/08/2006 01:22PM
Normal Topic
ESO Header keywordsStarted by:aladin, 05/08/2006 01:13PM
Hi,

I am trying to obtain the value of
specific header keywords,
"HIERARCH ESO SEQ RELOFFSETX ",
which gives the value of relative
offsets between two ISAAC images.
However, using the "header" related
tasks like imgets, results in an
error message or ... 		 
3591 2
By: aladin
05/08/2006 01:13PM
Normal Topic
hselectStarted by:dbrenner, 05/05/2006 01:11PM
I have a variable object.name which is
equal to HIP 1234.
The query '(object == "@@object.name")'
does not seem to work although there is
a header object with HIP 1234 as the
object
What's wrong? 		 
4058 2
By: dbrenner
05/05/2006 01:11PM
Normal Topic
Rotational BroadeningStarted by:Guest, 05/03/2006 05:50PM
Hi,

Do you have a code implemented in IRAF
that allow rotational broadening of
spectra? (p.e.; broadened spectra
created for vsini spanning a certain
range
by convolution with a theoretical
rotational profile (Gray 1992)). I would

like to apply the ... 		 
3779 1
By: fitz
05/03/2006 05:50PM
Normal Topic
ximtool on macs: runaway ism_wcspix p...Started by:massey, 04/30/2006 10:23PM
Hi, Mike---

Deidre complained that her G5 machine at
work seemed a little "unresponsive", and
I checked with "top", and found there
were 6 (!) ism_wcspix processes
fighting to see who could get the most
CPU. I have seen this in the past under
OSX: if ... 		 
5397 5
By: fitz
04/30/2006 10:23PM
Normal Topic
glibc error using mkobjectsStarted by:emma, 04/29/2006 12:31PM
Hi there,

I'm running a script many times which
calls starlist and mkobjects and after
running through the script a given
number of times the script crashes with
this error:

*** glibc detected *** free(): invalid
pointer: 0x8001002e ***
*** glibc dete... 		 
3993 2
By: Brooke
04/29/2006 12:31PM
Normal Topic
ximtool and linuxStarted by:massey, 04/28/2006 08:14PM
Mike,

I've resurrected my old Linux box
(running RH 9) for my summer student,
and in trying things out I find I cannot
get ximtool (V1.3) to work correctly:
both under "gnome" and under "kde" I
have the problem that I cannot change
the brightness or co... 		 
5689 5
By: massey
04/28/2006 08:14PM
Normal Topic
Appending a file extensionStarted by:massey, 04/26/2006 06:53PM
Hi, Mike et al:

I'm experiencing a slightly weird
problem: I have a set of files with long
wacky names like
s73475g0.5m15z-0.75t2.0.spec
s73500g0.5m15z-0.75t2.0.spec
s73525g0.5m15z-0.75t2.0.spec

It seems as if anything I do to try to
change the end o... 		 
3303 1
By: fitz
04/26/2006 06:53PM
Normal Topic
astrometry problem on CTIO Mosaic dat...Started by:, 04/26/2006 04:40PM
Hello,

My Mosaic data taken from CTIO-4m on
2004 and 2005 seem have astrometry
problem. MSCCMATCH seems run ok through
them and the rms is less than 1.
But be dithered images could not be
stack well, especially at the center of
the image. By examinin... 		 
3865 2
By: ping
04/26/2006 04:40PM
Normal Topic
Help with error in splotStarted by:Guest, 04/23/2006 04:53PM
My name is Matt Lykins and I am a second
year graduate student using IRAF for the
first time. I am measuring equivalent
widths of absorption lines in order to
calculate column density. The problem
that I am having is that I need to
record errors for the... 		 
3055 1
By: fitz
04/23/2006 04:53PM
Normal Topic
fitsutil installation questionStarted by:zarate, 04/22/2006 10:07PM
Hello Edo;

I do not know why you cannot build
it but I found
a macosx binaries for fitsutil.

Please get it from: (ftp anonymous)

iraf.noao.edu/iraf/extern/fitsutil-bin.macosx.tar.gz


Cheers
Nelson Zarate

On Sat, 22 Apr 2006 14:32:37 -0700
(PDT... 		 
3092 0
By: zarate
04/22/2006 10:07PM
Normal Topic
fxcor/afftrr/npix power of 2 bug: is ...Started by:malte, 04/21/2006 03:33PM
I've run into exactly the problem
described in
[b:010c9b56cb][URL=https://iraf.net/phpBB2/viewtopic.php?t=80604]fxcor/afftrr
bug: npix limited to
16384[/URL][/b:010c9b56cb] - fxcor
crashes when I hit 'f' to enter Fourier
mode and complains that npix is ... 		 
8687 10
By: fitz
04/21/2006 03:33PM
Normal Topic
Another question about scombineStarted by:lsh20, 04/18/2006 03:34PM
Hi Mike,
if i have 200 spectrums,and i
want to combine them to 100
spectrums,two combine to one. Can i use
a @file to be a input file? If i can,
how can i write the @ file? thank you 		 
2948 1
By: fitz
04/18/2006 03:34PM
Normal Topic
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 .
... 		 
3899 3
By: lsh20
04/17/2006 04:50PM
Normal Topic
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 ... 		 
5421 6
By:
04/14/2006 06:08PM
Normal Topic
imshiftStarted by:ping, 04/13/2006 11:07PM
I have a question about using imshift.
I found that imshift cuts off the
images shifted out of the original
boundary.

e.g. original image is 1000x1000 pixels
when imshift it by [200,300], the output
image is still 1000x1000, with the
pixel position... 		 
5474 4
By:
04/13/2006 11:07PM
Normal Topic
StuckStarted by:nice2bme, 04/11/2006 12:13AM
Hi,

I'm using IRAF to calibrate images taken
on Nov 12, 2005. These images were taken
using a 24" Telescope and for the scope
we have to have an action called as
'peer-flip'.

Pre-flip the data I have is highly
tilted from top left to bottom right,
th... 		 
2716 1
By: fitz
04/11/2006 12:13AM
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