[AstroPy] ANN: pywcs 1.9 released

[Michael Droettboom]

I have made a new release of pywcs, version 1.9.  It adds the following 
features and bugfixes since 1.8:

- Support binary image arrays and pixel list format WCS by presenting
   a way to call wcslib's wcsbth()

- Updated underlying wcslib to version 4.5, which fixes the following:

     - Fixed the interpretation of VELREF when translating
       AIPS-convention spectral types.  Such translation is now handled
       by a new special- purpose function, spcaips().  The wcsprm
       struct has been augmented with an entry for velref which is
       filled by wcspih() and wcsbth().  Previously, selection by
       VELREF of the radio or optical velocity convention for type VELO
       was not properly handled.

BUGS:

- The "pc" member is now available with a default "raw" Wcsprm object.

- Make properties that return arrays read-only, since modifying a
   (mutable) array could result in secondary values not being
   recomputed based on those changes.

- float properties can now be set using int values

Mike

-- 
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA