[AstroPy] got centroid?

Warren J. Hack hack at stsci.edu
Fri Apr 13 11:19:35 EDT 2012


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:


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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