[fitsbits] changing WCS entries when transposing an image - how?

[Michal Szymanski]

Hi,

FITS files coming from DSS have the complete information regarding the
transformation between pixel coords and RA/Dec, contained in their
headers. 

What is the simplest way to transpose such an image *together* with its
WCS header? I mean simple operations like cutting a subimage, shifting
or rotating the image.

I've tried IRAF's "imtranspose" but it seems to blindly copy all related
header entries *as is*, so the resulting image has a completely broken
transformation installed.

any hints would be appreciated,

regards, Michal.

-- 
  Michal Szymanski (msz at astrouw.edu.pl)
  Warsaw University Observatory, Warszawa, POLAND