[AstroPy] Astropy WCS question

[Perry Greenfield]

Actually, I meant all_world2pix… 

On Jul 21, 2014, at 4:03 PM, Perry Greenfield wrote:

> I think the answer depends on distortion model you are using, but all_pix2world is probably what you want if your distortion model is one that they mention.
> 
> Perry
> 
> 
> On Jul 21, 2014, at 3:35 PM, Brian York wrote:
> 
>> Greetings,
>> 
>> My apologies if this has already been asked, but I did not have terribly
>> good luck in searching the list archives. I'm currently working on some
>> image simulation, and think that astropy.wcs might be useful to me, but
>> I'm not sufficiently knowledgeable about WCS systems (or, for that matter,
>> about astropy) to be sure.
>> 
>> I have a list of sources, each with an RA, DEC, and intensity (in
>> counts/s), and I have a FITS header representing my output image, with WCS
>> and SIP coefficients. I know that wcs_world2pix would give me pixel
>> co-ordinates in the absence of distortion, but I'm wondering if there's
>> some combination of calls that can convert from (RA,DEC) to (X,Y) with the
>> distortion information that I have available?
>> 
>> Thanks,
>> 	-Brian York
>> 
>> 
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>