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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...

3765

By: massey

05/15/2006 08:54PM

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...

3295

By: fitz

04/26/2006 06:53PM

apflatten with varying fit parameters...Started by:dr.michi, 05/16/2007 12:19PM
I noticed that on our flat fields it
would be nice to have a lower order fit
in one part of the spectrum (the
fringe-plagued red part), while on the
rest a higher order would be nice.

Is there any way I can do this in an
automated manner?

Michael

2887

By: dr.michi

05/16/2007 12:19PM

apflatten problemsStarted by:tsergori, 08/14/2007 05:52AM
Hi IRAF gurus

I am trying to use apflatten
(imred.ccdred.echelle) to produce a
normalised flat field for echelle
spectra. The CCD has 20 or so
"glitches". Two are shown in the image
below. These glitches have fewer counts
than the surrounding pixels. T...

3382

By: valdes

08/14/2007 05:52AM

apextract with more than 1000 aperturesStarted by:kanaan, 12/01/2011 06:23PM
hi All,

I am using apextract for IFU spectra.
We have 1300 fibers. I get the
keywords:

APNUM###

there is only three digits. In my case
it goes all the way to APNUM999

actually if I look at apertures around
100 I see:

APNUM100= '1009 1009 3098.03...

1595

By: valdes

12/01/2011 06:23PM

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...

1932

By: fitz

06/19/2018 09:22AM

Aperture photometry done, what now...?Started by:AnTaR3s, 12/12/2009 04:24PM
Hello everyone.

I've recently done some observations and
I#m trying my luck with aperture
photometry in IRAF. I've managed to get
a full list of my measurements, which
looks something like this:

#N IMAGE ID XCENTER
YCENTER ...

3491

By: fitz

12/12/2009 04:24PM

Aperture and area in PhotStarted by:RMendez, 10/22/2010 03:35PM
I am using noao/digi/daophot to do
aperture photometry.

In photpars I set the aperture to a
given radius.

I do phot on an image, and in the output
photometry file there is an entry for
"AREA". In general, it is quite close to
PI x Radius^2, but not ex...

1533

By: fitz

10/22/2010 03:35PM

Apall: Optimally extracted spectra do...Started by:stpjhj, 07/09/2014 07:15PM
Dear all,

I am trying to reduce a longslit
data(from SUBARU FOCAS, btw,) and I am
having some problem that I couldn't
understand.

When I invoke apall task with weight
option set to "none," resulting spectra
seems fine.
But if I set weight option ...

1333

By: valdes

07/25/2014 05:41PM

apall: crossing chip gapsStarted by:jacob, 07/01/2008 05:33PM
I am using apall to extract 1d spectra
from 2d IMACS spectra. The spectra span
four ccds, and apall seems to deal with
the discontinuities at the chip gaps
just fine until I see the final
extracted spectra. Each spectrum is cut
off at the third chip g...

1615

By: valdes

07/01/2008 05:33PM

APALL visualizationStarted by:fitz, 07/08/2009 05:04PM
is there any way to visualize the output
of apall? I am thinking about
a procedure that would use the
information in database and draw the
apertures on 2D image, e.g. in DS9; or
that would produce a mask-like
2D image with 1 in the aperture and 0
outs...

1924

By: tomkam

07/08/2009 05:04PM

APALL tracingStarted by:Guest, 03/23/2006 03:38AM
We have no idea what is happening in the
task "apall". Specially what is
happening in the task called "tracing".
could you please give me an idea about
this.

Janaka Adassuriya
Research Scientist
Arthur C Clarke Institute
Katubedda, Moratuwa.
Sr...

2850

By: valdes

03/23/2006 03:38AM

apall sky/ background parametersStarted by:milena, 04/04/2011 09:48AM
hey,

I need the total number of counts per
pixel from the background/ sky (for the
"ccd equation") that IRAF calculated in
apall. is it written in the database?
which number is it?

thanks a lot!

milena

ps: here is the database entry:

# Wed 12:25:3...

2411

By: milena

04/04/2011 09:48AM

Apall routine problemStarted by:adamclarke, 01/30/2011 01:24PM
Hey

Having a problem using the apall routine
as outlined in the IRAF guides. When I
read in an image and go on to define
apertures, the routine seems to be
plotting a spectra rather than a pixel
count in the y direction.

Basically it looks to me that...

2163

By: adamclarke

01/30/2011 01:24PM

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

By: jadiazt

02/09/2015 10:11PM

apall re-extracting the same thingStarted by:eteq, 06/28/2007 08:13PM
I'm using the apall task to extract a
series of spectra, and I can't seem to
find a way to tell it to do exactly what
it did the last time it was run. I want
to simply output the exact same thing,
but in a different format (e.g. I want
both strip and o...

2756

By: adidar

06/28/2007 08:13PM

apall problems w/ coordinate system:o...Started by:paulartcoelho, 10/03/2006 08:43PM
hi there,

I have a set of GMOS (Gemini) longslit
spectra. I reduced them using Gemini
package, up to wavelength calibration
(gstransform). From now on I want to use
noao package to extract the apertures
(apall). Because gemini fits has a
specific forma...

12047

By: valdes

10/03/2006 08:43PM

apall not extracting multi-spectraStarted by:lwinter, 12/18/2009 11:35PM
Hello.

I am having a problem with the updated
version of iraf (12.1.1) where
apall appears to be extracting only the
source spectrum without the
sky or error. The resultant file from
apall is an ms.fits file,
generated with apall with the extras...

1796

By: lwinter

12/18/2009 11:35PM

apall multispec format descriptionStarted by:salis, 01/09/2014 05:19PM
Hello,

Sorry for the basic question but I need
to know the description of bands when I
use multispec format in apall. I could
not find them anywhere. I have four
bands extracted in the final wavelength
calibrated spectrum. The last 2 seem
like the ba...

2618

By: fitz

01/09/2014 05:30PM

apall (V2.12.2) - sky subtractionStarted by:Guest, 11/04/2005 07:24PM
Hello Anupama,

Thank you for including the data. I do
not believe there were any
significant changes between the two
versions of IRAF for the aperture
extraction. Unless you used exactly the
same aperture definitions,
that is the database/ap* f...

2690

By: Guest

11/04/2005 07:24PM

apall (V2.12.2) - sky subtractionStarted by:Guest, 10/28/2005 06:52AM
I am facing problem with the background
sky subtraction while extracting
spectra using apall.

I find that the night sky emission lines
are not well subtracted. I am
currently using V2.12.2. However, I did
not face any such problem when I
was using V...

2510

By: Guest

10/28/2005 06:52AM

apall (V2.12.2) - sky subtractionStarted by:Guest, 10/26/2005 04:38PM
I am facing problem with the background
sky subtraction while extracting
spectra using apall.

I find that the night sky emission lines
are not well subtracted. I am
currently using V2.12.2. However, I did
not face any such problem when I
was using V...

2639

By: Guest

10/26/2005 04:38PM

Anyone use iraf for SDSS spectrum re...Started by:Quietskies, 05/01/2007 08:55PM
I'm only undergraduate and doing some
work with SDSS galaxies' spectrum

Too much problems, this is the first
time I try Iraf and Linux, So ........

Help.....Thank you very much :?: :?:
:idea:

2661

By: fitz

05/01/2007 08:55PM

Any way to make ds9 save *complete* R...Started by:raybutler, 04/28/2009 04:28PM
Hi,

I have discovered that I can
automatically make perfectly
colour-balanced RGB composites in ds9 -
much better than even my old
statistics-based scripts which used
color.rgbsun. For my particular data,
setting scale to (sqrt, 98%) for all 3
channels...

9987

By: paco

04/28/2009 04:28PM

any task to subtract a star othan tha...Started by:china_108, 06/23/2011 09:54AM
I've got a psf generated by tiny
tim(http://tinytim.stsci.edu/cgi-bin/tinytimweb.cgi).
It is in fits format. Now I am trying to
subtract an unwanted star using this
psf. Other than the task substar, is
there anything else I can use? I don't
want to use ...

1420

By: valdes

06/23/2011 09:54AM

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

2944

By: fitz

04/18/2006 03:34PM

another question about extracting spe...Started by:owen, 07/14/2007 08:24AM
dear all,
i am faced with an important question
about extracting 1D-spectum. i extracted
several spectra from different parts of
a galaxy in one slit. Except the core
area, the continuum from other part of a
galaxy is too weak to be traced, so when
trac...

2569

By: valdes

07/14/2007 08:24AM

another push, please...Started by:Michael, 09/12/2007 12:33AM
Sumner, New Zealand

2007 September 12

IRAF Support
iraf@noao.edu

Dear Sir:

Thank you for your reply to my request
of September 10, suggesting that I
examine the Systems
or Applications forum at IRAF.net for
answ...

3007

By: Michael

09/12/2007 12:33AM

another problem with DS9 v5.2 (5.2-2,...Started by:vall, 06/05/2008 08:48AM
Hello,

I have a problem with DS9 v5.2 (on FC9).
When I display an image form IRAF, the
scale menu is no longer disabled (it was
disabled until v5.1), but when I try to
change the image scaling, it takes
forever (and lots of memory and CPU
resources) an...

4581

By: fitz

06/05/2008 08:48AM

another doslit bug?Started by:massey, 01/26/2009 06:14PM
I came across another issue in doslit,
having to do with the reidentification
of arc lines. In my case I have two
stars on the slit, and there
is a significant zero-point shift
between the arcs of the two stars.
doslit does the reidentification of
the...

2068

By: massey

01/26/2009 06:14PM

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