[AstroPy] Cross matching two source lists

[Christoph Deil]

Hi Tom,

STILTS [1] and TOPCAT [2] have excellent cross-matching functionality, provided via the STIL [3] library.
You can browse the code online [4].

Unfortunately it's all Java and can only be accessed from Jython, not CPython [5].

Because all my analysis scripts are CPython I am saving my source lists to FITS files and make an external call to stilts for the cross-matching at the moment.

Having similar functionality in astropy would be great!

Christoph

[1] http://www.star.bris.ac.uk/~mbt/stilts
[2] http://www.star.bris.ac.uk/~mbt/topcat/
[3] http://www.star.bris.ac.uk/~mbt/stil/
[4] http://www.star.bristol.ac.uk/~mbt/stil/javadocs/uk/ac/starlink/table/join/package-summary.html
[5] http://www.star.bris.ac.uk/~mbt/stilts/sun256/sun256.html#jystilts

On May 11, 2012, at 9:03 AM, Thomas Robitaille wrote:

> Hi everyone,
> 
> I am looking for a Python package that can do arbitrary and efficient
> cross-matching of source lists, i.e. some kind of kd-tree that uses
> spherical rather than euclidean distances. Is anyone aware of such a
> package?
> 
> Thanks,
> Tom
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> AstroPy at scipy.org
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