[fitsbits] crop FITS images

[William Pence]

Steve Allen wrote:
> 
> On Thu 2002-10-17T10:55:52 -0400, William Pence hath writ:
> > Any program that uses CFITSIO to open an image shares this capability, but
> > in particular the 'fitscopy' program that is distributed with the CFITSIO
> > library may be used to copy sections of image as shown below:
> 
> > These examples extract a 100 by 100 pixel subimage out of the input image,
> > starting at pixel location (101,201).  The coordinate system keywords are
> > also updated in the output image.  In the second example, the output image
> > is also compressed with the gzip algorithm to reduce disk space.
> 
> Does this update the IRAF image section keywords also?

No.  Where are these keywords documented?
--
____________________________________________________________________
Dr. William Pence                          pence at tetra.gsfc.nasa.gov
NASA/GSFC Code 662         HEASARC         +1-301-286-4599 (voice)     
Greenbelt MD 20771                         +1-301-286-1684 (fax)