[AstroPy] got centroid?

Kathleen Labrie klabrie at gemini.edu
Fri Apr 13 16:18:28 EDT 2012

Hi Warren,

Is this function also providing flux estimates and fwhm measurements?


On Apr 13, 2012, at 5:19 AM, Warren J. Hack wrote:

> Wolfgang,
> There is a star-finding routine in the soon-to-be-officially-released 
> drizzlepac package available from STScI.  This routine can be run on its 
> own (it is all in Python after all), but a stand-alone interface to run 
> just the star finding has not been documented yet.  It is just a single 
> function call that requires a numpy array of the image and a few 
> numerical parameters and I can point you to examples where it is run 
> within a larger task if you contact me directly. Anyone familiar with 
> DAOFIND from IRAF will be able to use this code easily.  If you want to 
> check it out, you can get this code in pre-release beta form (in binary 
> for Mac or source for other platforms) from:
>     http://stsdas.stsci.edu/irafx
> We have found that it can provide RMS on point sources of <0.1 pixels 
> (and seen 0.03 pix RMS in some cases), but your mileage may vary.
> Warren Hack
> Science Software Branch
>> Hey all,
>> I just wanted to know if anyone has a quick and smart centroid script in any of the python libraries (easily installable). Even better would be star finding algorithms like sextractor.
>> Cheers
>>     Wolfgang
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