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mknoiseStarted by:tsaab, 11/09/2013 12:53AM
How much Poisson noise is added when i
am using mknoise?

839

By: tsaab

11/09/2013 02:41AM

Re: A WERID FLUX CALIBRATION PROBLEMStarted by:haha, 11/07/2013 12:35PM
I am extracting a spectrum of a star by
iraf. During the several steps near the
end , I meet a flux calibration problem
.

Anybody knows why?

calibrate
input=@imagelist3//btfc_tran.0001
output=@imagelist3//flux extinct+ flux+
\
extinction="./e...

930

By: haha

11/07/2013 06:24PM

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...

780

By: netoph

11/03/2013 03:06AM

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...

772

By: jeanm12

10/29/2013 01:53AM

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

By: fitz

10/22/2013 11:07PM

ximtool not picking WCSStarted by:massey, 10/15/2013 12:20PM
Since "tfinder" still isn't working
under 2.16, I've been using
astrometry.net to add WCS to my headers.
It's not as precise but it IS
automatic, and usually works.

However, it uses a gnomic projection
plus distortion term by default, and
even if t...

1330

By: massey

10/15/2013 02:00PM

fc does not produce executable fileStarted by:weistrop, 09/24/2013 07:46PM
I'm running IRAF 2.16 on a MacBook Pro,
OS X 10.7.3 and have downloaded fortran.
I'm trying to get an executable for a
program called trans in file trans.f.
When I type fc trans.f I get

ttools> fc trans.f
trans.f:
MAIN trans:
gcc: error trying...

1311

By: weistrop

10/10/2013 09:28PM

geotran issueStarted by:massey, 09/28/2013 07:46AM
I'm using geomap and geotran to try to
align two ccd direct images taken one
right after another; the linear pixel
shift is about half a pixel. I get a
very nice geomap solution (rms < 0.1
pixel) but when I transform one of the
images to match the o...

1989

By: massey

09/28/2013 07:46AM

Inaccurate FWHM of output PSF from PS...Started by:rdcschan, 08/29/2013 01:29PM
Hi everyone,

I am trying to match the PSF in
different HST/WFC3 bands, but no matter
which kernel size, grid size, and filter
options (including frequencies) I used,
I cannot get the FWHM of the output PSF
in SOME bands correctly.
The out...

2802

By: rdcschan

08/29/2013 01:29PM

HDMGETR warning when attempting to ap...Started by:antares, 08/29/2013 01:41AM
Hi, I am trying to apply fringe
correction to a single image:

[code:1:7c57d0d552]ecl> ccdproc
test389.fits fringeco+ illum=Illum30
fringe=Fringe
Warning: HDMGETR: No value
found[/code:1:7c57d0d552]

In another thread
([url]https://iraf.net/...

4044

By: antares

08/29/2013 01:41AM

Feature Detection in Smoothed ImagesStarted by:fitz, 07/21/2013 09:08PM
[color=red:1368f64d54] [Moderator's
Note: Posted on user's behalf]
[/color:1368f64d54]

My purpose is to smooth an optical image
and check whether there is a source at
a ra&dec which is got from other
energy band.The source is near a
galaxy's cen...

1332

By: fitz

07/21/2013 09:08PM

msccmatch - floating point overflowStarted by:mfs485, 06/26/2013 08:25PM
I'm trying to fix up some WCS info in
some images, but whenever the routine
tries to update the coordinate
information (update = yes) in the fits
file, I get (for example) "ERROR:
floating point overflow called as:
`msccmatch (input=110613.0203.fits)'
"...

2818

By: fitz

06/26/2013 08:25PM

ECIDENTIFY residual fitStarted by:phntmII, 05/22/2013 04:41PM
Got it, solved!

Thanks,
JR

1049

By: fitz

05/22/2013 04:41PM

Problem with wcs solution for WFI imagesStarted by:johannes1808, 05/08/2013 07:17PM
Hello,

I am currently reducing WFI images with
IRAF/MSCRED package. I have used the
esowfi package to translate the headers
and get a WCS solution. However, the WCS
solution is completely wrong. I have
used the wcs solution WCSASTRM = 34741
(19990902T2...

1530

By: johannes1808

05/08/2013 07:17PM

Error: Cannot open file (tmp$ftmpXXXXX)Started by:fks, 05/02/2013 02:40PM
Dear All,
Can anybody please point us to the
possible causes of the following error
message? (We have already verified that
we have the relevant read write
permissions and the disk space on the
/tmp/ directory, and that the image
files exists in the ...

2497

By: fitz

05/02/2013 02:40PM

imcopy and fits headerStarted by:jcadien1, 04/29/2013 05:37PM
I just now noted something about imcopy.
I have long image strips fro a drift
scan. I use imcopy to slice them into
smaller images. The header doesn't have
a lot of usable info in it. However,
when I do a single copy, such as
imcopy input[1:3000,*] outp...

2067

By: fitz

04/29/2013 05:37PM

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...

4048

By: morrisonss

04/19/2013 02:26PM

Incorrect behavior of continuum (sfit...Started by:esemenko, 04/10/2013 09:13PM
Hello everyone!
I was using spectool and task continuum
itself for fitting of spectrum continua.
I had a good and robust result with 32
bit iraf v2.14. Now I have two different
installations of IRAF (macintel and
linux 64) and both of them show
differen...

1445

By: esemenko

04/10/2013 09:13PM

ALLSTAR problemStarted by:fitz, 03/27/2013 10:07PM
[color=red:3f0d9b6248]Note: posted on
behalf of user by
moderator.[/color:3f0d9b6248]

While running the daophot process I
encounter a rather weird result of the
allstar routine. When I plot the
mag-mag_err of the sources as derived
from the image.mag...

1106

By: fitz

03/27/2013 10:07PM

PSF subtraction problemStarted by:fitz, 03/27/2013 09:58PM
[color=red:91c753834f]Note: posted on
behalf of user by
moderator.[/color:91c753834f]

I have a problem with daophot. I can't
find any answer on the iraf.net forum.
If you or somebody can help, I am much
appreciated.

I am working on images of different...

1721

By: fitz

03/27/2013 09:58PM

esohdr (esowfi) fails on 2002 archive...Started by:dfadda, 03/01/2013 01:38AM
Hi,

I am trying to use the esowfi package to
reformat the header of WFI fits files in
order to reduce them using mscred.
My operative system is Ubuntu Linux
(64bits) and I installed iraf version
2.16.
The mscred package uses binaries built
for the 64bi...

1995

By: dfadda

03/01/2013 01:38AM

Optimal vs non-optimal extraction for...Started by:galtavi, 02/28/2013 09:49AM
Dear IRAF users, I would like to ask
your opinion about this "problem" I
found with the optimal extraction of
spectra contaminated by second order
that may be of general interest.
I want to extract all the flux, also the
contaminating one, because I'll...

1315

By: galtavi

02/28/2013 09:49AM

msctpeak / tpeak: save guesses?Started by:keflavich, 02/11/2013 07:19PM
Is it possible to save the list of
manually fitted coordinates (input
guesses and/or centroided pixels) when
running msctpeak / tpeak? I've found
myself needing to re-fit coordinates
many times, and it's a huge waste of
time to have to re-centroid by h...

1058

By: keflavich

02/11/2013 07:19PM

Resetting CRVAL1 after scopyStarted by:stockton, 02/09/2013 01:26AM
scopy retains the original value of
CRVAL1 after extracting a subregion of a
spectrum, providing a pixel offset
(CRPIX1) to compensate for the
wavelength difference. I need to feed
these spectra into an application that
depends on having a value of CRVA...

1126

By: stockton

02/09/2013 01:26AM

imcoadd: workaround to include all pi...Started by:keflavich, 02/06/2013 09:42PM
I'm looking for a workaround to the
issue in imcoadd where the images are
*cropped* rather than expanded to fill
the full frame:
http://www.gemini.edu/sciops/data/IRAFdoc/imcoadd.html
(see item 2 under Planned upgrades to
IMCOADD).

If I have a good geo...

2219

By: jturner

02/06/2013 09:42PM

Bug in apextractStarted by:jturner, 02/06/2013 12:04AM
Hi Mike & Frank,

I'd like to report a bug in aptrace that
was causing one of our tests to crash
under 2.16.

At L238 and 302 of aptrace.x, the
variables "line1" and "line2" are used
without being initialized. In our
testing, they were starting off...

1364

By: jturner

02/06/2013 12:04AM

msccmatch works, then second try failsStarted by:keflavich, 02/05/2013 06:48PM
I successfully ran msccmatch on an image
where I had come up with a decent fit
using msctpeak:

[quote:279c35b722]msccmatch
S20130131S0063.fits[1]
robberto_plaintext.txt usebpm=no
MSCCMATCH:
S20130131S0063.fits[1]:
3838 input coordinates
3799/...

1555

By: keflavich

02/05/2013 06:48PM

msccmatch with Mosaic2 dataStarted by:paco, 01/11/2013 11:49PM
I am reducing data from the Blanco +
Mosaic2. The pipeline data has a pretty
good WCS, but I am trying to improve it
for critical matching, using a list of
astrometric stars from the UCAC4, all
with position uncertainties < 100
mas.

I can do good s...

2270

By: paco

01/11/2013 11:49PM

ADDSTAR ProblemStarted by:fitz, 12/20/2012 06:36AM
[color=red:d7f1343e70][Moderator's Note:
Posted on behalf of
user][/color:d7f1343e70]

Hi,

I am trying to use addstar, but I don't
seem to have any luck.
Using the PSF function determined by
daophot.psf (see attached), I use
addstar with a photfile re...

1868

By: fitz

12/20/2012 06:36AM

ccdmask errorStarted by:jdm, 11/21/2012 10:28PM
Hi,

I'm trying to create a bad pixel mask
for each panel of a six-chip mosaic
image. I run mscarith to divide one flat
by another (creating ratio.fits), and
then I run ccdmask individually for
ratio.fits[1] through ratio.fits[6]. It
creates the first f...

1628

By: jdm

11/21/2012 10:28PM

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