[AstroPy] got centroid?

Wolfgang Kerzendorf wkerzendorf@gmail....
Fri Apr 13 10:47:38 CDT 2012


Hey all,

Thanks for the many suggestions, there seem to be quite a few gems among it. For future reference I have put the suggestions on the astropy wiki (very quick and dirty for now), but hopefully that will help us in the long run when looking for these (only seemingly) simple algorithms to center on an object. Feel free to edit and add to it: https://github.com/astropy/astropy/wiki/2ddata_centroid

I also created a root page for 2ddata utilities at : https://github.com/astropy/astropy/wiki/2ddata_util

Cheers
   Wolfgang

On 2012-04-13, at 5:19 PM, 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
> STScI
> 
>> 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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