fun with coadding images on Disk Set 19

[Stupendous Man <richmond@a188-l009.rit.edu>]

  Check out my quick'n'dirty analysis of coadding frames
from disk set 19:

       http://a188-l009.rit.edu/tass/markiv/michael/coadd/coadd.html

  People who are working on DS 19 may find the shift in
position from frame to frame, even in the "follow" frames,
of some interest ...

                                     Michael Richmond