[AstroPy] Rotate an image and create new FITS header with updated astrometry

[Peter Teuben]

Marcio
  I didn't know they didn't flux conserve. You should file a bug report.  They love those.

 I know the equivalent routine in miriad (regrid) does conserve flux, but it's normally used on radio data with a well described beam. Not that your data doesn't have those, but in a bind that's another way.

Alternatively you could use mRotate, and measure the flux in some large area, and rescale manually if need be.

peter

On 11/15/2016 10:55 AM, Marcio Melendez wrote:
> Hi Peter, 
> I use Montage mainly for display purpose, to get the correct sky orientation, but I have never used it to perform any operation. I see that there is a rotation utility, mRotate, but from the description "This module is meant for quick-look only; it is *not flux conserving*." which is not useful for what I need. Are there any other options? 
>
> Thanks! 
>
> On Tue, Nov 15, 2016 at 10:32 AM, Peter Teuben <teuben at astro.umd.edu <mailto:teuben at astro.umd.edu>> wrote:
>
>     the best is to use the python interface to montage. it's a contributed package for astropy.
>
>
>     On 11/15/2016 09:26 AM, Marcio Melendez wrote:
>>     Hi all, 
>>     Is there a similar function to IDL's  HROT in python, e.g., a function to rotate an image and create a new FITS header with updated astrometry. 
>>
>>     Thanks!
>>
>>     -- 
>>     Marcio B. Melendez, Ph.D
>>     JWST ISIM Optics Support Scientist
>>     KBRwyle Science, Technology and Engineering Group
>>     NASA Goddard Space Flight Center  Greenbelt, MD  20771  
>>     Bldg. 29 Rm. T29-10, phone: 301-286-8517 <tel:301-286-8517>
>>
>>
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>
> -- 
> Marcio B. Melendez, Ph.D
> JWST ISIM Optics Support Scientist
> KBRwyle Science, Technology and Engineering Group
> NASA Goddard Space Flight Center  Greenbelt, MD  20771  
> Bldg. 29 Rm. T29-10, phone: 301-286-8517
>
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