[AstroPy] Past Mention of Source Extractor Command in IRAF?

Rose Finn rfinn at siena.edu
Tue Apr 28 20:40:31 EDT 2009

I am not sure if you are referring to astrometry.net, but I think it
does much of what you describe:


Take care,

On Tue, Apr 28, 2009 at 8:25 PM, Wayne Watson
<sierra_mtnview at sbcglobal.net> wrote:
> Probably not, but is what you mentioned source extraction? The idea is
> that you take a picture of some part of the night sky, and then turn it
> over to the source extractor. It twists, rescales, and turns your image
> every which way until it matches 10 or more corresponding objects
> (stars, etc.) in a photographic atlas of some sort. If it looks right,
> you can then extract information about those objects and maybe others.
> It's an astrometric tool.
> James Turner wrote:
>>> I believe in some of my exchanges on this mailing list in the last
>>> many works someone mentioned an IRAF facility akin to what is
>>> popularly called source extract. Mention was made of what could be
>>> considered a command name that somehow is used in connection with the
>>> idea. Does anyone know what that single (command) word was or where I
>>> would find the extractor topic discussed in IRAF?
>> Is it noao.digiphot.apphot (type "help apphot")?
>> James.
> --
>           Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
>             (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
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>           a cube whose side is 5.52*10**-6 meters (tiny!). That
>           adds up to a 150 pound person. It's not a surprise that
>           we are mostly space. (Calculation by WTW)
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Rose A. Finn, PhD
Department of Physics
Siena College
Loudonville, NY
(518) 782-6764

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