[AstroPy] Past Mention of Source Extractor Command in IRAF?
rwagner at physics.ucsd.edu
Tue Apr 28 23:07:58 EDT 2009
Out of curiosity (and some background knowledge), I did some hunting
around on the IRAF site. My original comment was going to be that
SExtractor , is an independent tool, which "builds a catalogue of
objects from an astronomical image", and is separate from IRAF ,
which is designed for image manipulation. And I was going to agree
with Rose that what you were probably looking for was astrometry.net.
However, what I found on the IRAF site was this entry in the FAQs:
Is there an ASTROMETRY package I can use?
Now, what I think your looking for is the imcoords package in IRAF,
which includes functions like this :
ccfind: Locate reference catalog objects in images
ccxymatch: Match celestial and pixel coordinate lists
Hope I'm close, if not, I hope this didn't take up too much of your
 SExtractor - http://tinyurl.com/cbhk4r
 IRAF - http://iraf.net
> Just IRAF. Well, I can easily get around this in a paper I'm
> writing by
> just saying that IRAF is another tool that does source extraction.
> who created IRAF and who supports it? I found the install pdf.
> Ah, NOAO.
> I don't have it installed, since I'm on Win. I did did install Cygwin,
> but never got around to installing it there. It's not something I need
> Rose Finn wrote:
>> 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
>>> every which way until it matches 10 or more corresponding objects
>>> (stars, etc.) in a photographic atlas of some sort. If it looks
>>> you can then extract information about those objects and maybe
>>> 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")?
>>> Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
>>> (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
>>> Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
>>> All the neutrons, and protons in the human body occupy
>>> 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)
>>> AstroPy mailing list
>>> AstroPy at scipy.org
> Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
> (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
> Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
> All the neutrons, and protons in the human body occupy
> 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)
> AstroPy mailing list
> AstroPy at scipy.org
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