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QUERY REGAARDING HOW TO PLOT AZIMUTHA...Started by:bijusaha, 08/04/2023 12:48PM
I have used the ELLIPSE task to obtain
the radial variation of intensity for a
galaxy but that is averaged over
azimuthal angle for each ellipse defined
by some semi major axis. How to extract
the how to obtain the variation of
intensity with azimuthal ...

1918

By: bijusaha

08/04/2023 12:48PM

FlatcombineStarted by:camjh, 03/28/2008 05:33PM
Hi,
I have a problem with the Iraf
FLATCOMBINE task, when trying to create
a combined flat file of UVES flat files
(ff lamp 1) I get errors. I have tried
running it with different lists and by
typing in the single files. Everytime I
get an error:

List ...

7759

By: darsh

06/29/2023 05:00PM

Reidentify with two reference imagesStarted by:mshea, 02/07/2023 10:03PM
Hi all,
Is there a way to use two reference
images in reidentify?

I currently have two comparison lamps,
Neon and Krypton. Neon calibrates the
data well in the red but does poorly in
the blue, while Krypton is the opposite.
Due to differences in e...

1612

By: valdes

02/09/2023 05:18PM

Difficulty with reidentifyStarted by:Patrick Watson, 02/28/2022 06:51AM
Hello from a lone IRAF user,
I have a spectrograph susceptible to
flexure caused by temperature changes
and gravity. The calibration lamp is
internal to the spectrograph and hence
any shift between calibration images can
be sheeted home to the spectrog...

1354

By: Patrick Watson

02/28/2022 06:51AM

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...

1534

By: valdes

07/19/2021 11:19PM

APSUM error Started by:ham, 06/19/2021 09:18PM
Running iraf 2.16.1-2018.11.01 on a
linux64 machine.

Desire: Reducing data from a Fiber
Spectrograph

Step 1) apsum from apextract pkg is run
on a flat-field image. This image is
designed to permit the determination of
the location and shape of ea...

1731

By: valdes

07/19/2021 11:00PM

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...

621

By: Hawkmoon

05/28/2019 04:57PM

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...

651

By: Francesca

04/19/2019 09:52AM

'ERROR: HDMGETR: No value found' of f...Started by:jjbykk9999, 02/14/2019 03:28AM
I started to study how to use iraf,
but when I use flatcombine, it says

ERROR: HDMGETR: No value found
"ccdproc (ims, output="",
ccdtype=ccdtype, noproc=no"
line 38:
ccdred$flatcombine.cl
called as: 'flatcombine
(mode=...

1417

By: fitz

02/19/2019 03:31PM

xgterm problems on MacOS SierraStarted by:carlo, 08/28/2018 01:05AM
Hi, im not still very good at
programming, i installed IRAF on MacOS
Sierra but i can't get the terminal to
open xgterm, it just keeps anouncing
dyld: Library not loaded:
/usr/X11R6/lib/libXpm.4.dylib
Referenced from:
/usr/local/bin/xgterm
Reason...

3724

By: ncaon

12/19/2018 12:58PM

Problem with running ds9Started by:pmforlife, 11/12/2018 08:47AM
I have ubuntu 16.04.5 Desktop, 32 bit
and have installed IRAF.

In the ds9 download page,
([url]http://ds9.si.edu/site/Download.html[/url])
there is no separated versions for 64
and 32 bit. So I downloaded the one:
[b]Linux Ubuntu 16[/b]
When I unzip...

2183

By: pmforlife

11/26/2018 10:03AM

Problem with Gemini IRAF for gemini d...Started by:minhee, 11/15/2018 05:46AM
Hello, all.
I have a problem with Gemini IRAF when I
run gsflat for data redcution of GMOS
data.
Here is the error what I saw.

---------------------------------------------------------------------------------------------------------------
gmos> g...

1013

By: minhee

11/15/2018 05:46AM

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...

707

By: fabvitali

11/09/2018 04:39PM

FXCOR: INDEF VelocitiesStarted by:Prabhani, 07/12/2018 06:04AM
Hi!
I am trying to calculate radial
velocities using FXCOR. I am testing
with two fits files. I do not get
velocity values; except I get all the
velocities as INDEF. Could you please
help me figure out what's wrong?
Thanks in advance!
-Prabhani

Th...

2105

By: SpectralDude

10/22/2018 05:36PM

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...

677

By: abraham

10/08/2018 04:39PM

Pixel subscript out of boundsStarted by:cassioleandro, 09/27/2018 08:49PM
I'm processing nifs data using adapted
nifsexample scripts. They run OK, but
when I try to nfextract the spectrum
from the final cubes I have the folowing
error message:

ERROR: Pixel subscript out of bounds
(catfbrgN20150630S0161[SCI,1][1:62,*])
...

834

By: cassioleandro

09/27/2018 08:49PM

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 ...

507

By: salis

09/25/2018 08:08PM

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...

721

By: fitz

09/05/2018 04:16PM

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...

804

By: Zeleke Amado

08/20/2018 12:29PM

ESO files and xonedspec packageStarted by:fitz, 08/15/2018 04:49PM
[color=darkred][Moderator's Note:
Forwarded from Story posting][/color]

Using ESO file fits I realize I have to
use xonedspec package since the
wavelength data is given in a separate
array. Now I can "splot" the file where
before it says: ERROR: M...

863

By: fitz

08/15/2018 04:49PM

GEOMAP/GEOTRANStarted by:zech2453, 08/07/2018 10:20PM
Hi I've been trying to run
geomap/geotran on some of my distorted
images but I cannot seem to find the
right fit. What I've done:

1. Generated a coordinates list of xin
yin xref yref
2. Fed said list into geomap
3. Use geomap outputs and fed into g...

1184

By: zech2453

08/07/2018 10:20PM

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 = ...

558

By: fitz

08/01/2018 04:38PM

APEXTRACT ExamplesStarted by:fitz, 06/19/2018 09:16AM
[color=red]]Moderator's Note: Forwarded
from story submission][/color]

Hi,

I am new to using IRAF for aperture
extraction. Does anyone know of any good
examples to show how to use the
apextract tasks in the noao package? I
tried using the help fe...

1939

By: fitz

06/19/2018 09:22AM

Error : No bad pixel mask foundStarted by:fangwan, 07/16/2009 01:28PM
When I use darkcombine , it says" Error
: No bad pixel mask found" , could you
tell me the reason.Thank you for your
help!

6583

By: Pamela

05/29/2018 08:13PM

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...

809

By: haha

05/14/2018 12:31PM

mknobsfile error in V2.16.1Started by:cngeow, 05/09/2017 07:57AM
Hi, I have trouble with mknobsfile in
IRAF with the following version:

NOAO/IRAF PC-IRAF Revision 2.16.1 EXPORT
Mon Oct 14 21:40:13 MST 2013

Below is the input for mknobsfile

PACKAGE = photcal
TASK = mknobsfile
photfile= stdobs.mag...

1835

By: cngeow

05/08/2018 03:07AM

Greek letters in axis labels for sgraphStarted by:weistrop, 02/13/2018 08:06PM
I'm having trouble with Greek letters in
axis labels for sgraph. I have
what looks like the exact same
formatting for the x and y axes, but
the y
axis label is fine while the x label has
spaces in front of the Greek
letters. This is after I use
...

1124

By: weistrop

02/13/2018 08:06PM

Cannot find STSDAS download for use i...Started by:fitz, 02/08/2018 06:53PM
[color=red][Moderator's Note: Forwarded
from story submission][/color]

My MacBook Air was recently updated to
OS X 10.13.3 and IRAF is working.
However, I need a task under STSDAS, but
cannot find a version of STSDAS/TABLES
to download anywhere. App...

2738

By: olebole

02/09/2018 09:22AM

Fitparams segmentation violationStarted by:corinn4, 01/26/2018 06:22PM
Hi, I'm a student working on photometry
of a supernova. I've run into the same
problem as described in this topic,
[url]https://iraf.net/forum/viewtopic.php?showtopic=1467834[/url].
I'm using a Mac with OS X 10.11 and IRAF
2.16.1, 64-bit. I've read the...

997

By: corinn4

01/28/2018 06:12PM

problem working on SDSS spectra (fits...Started by:ania.wojtowicz, 11/28/2017 03:32PM
Hello,

I have trouble with sdss spectra that
are stored as fits table. I would like
to correct and display to prepare to
further analysis but do that I need to
have fits image system.
I have tried various different methods
including tcopy fits tabl...

1070

By: ania.wojtowicz

11/28/2017 03:32PM

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