bogus values in photometric solution ... solved

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

  Tom Droege and Rich Knowles pointed out that the photometric
calibration portion of the pipeline would sometimes fail.
I've finally tracked down the source of the error: it is the
library of numerical routines, called "CCMATH", which I had been
using to solve a big least-squares equation.

  Today, I replaced the CCMATH routines with functions from 
another library of numerical routines, the "GNU Scientific
Library".  The program runs without error and yields a good
solution for all images on the night 020206; with the CCMATH
routines, it would give bogus results for the entire night,
and for certain subsets of the them.

  I need to produce a new version of the "photom" program, 
which calls the GSL routines.  It will take me some time to 
write and document the new version.  At the same time, I'll
fix the small error in the matching routines noted earlier,
and create a larger subset of the Tycho data for use in 
matching.  It will probably take me a couple of weeks.

  Thanks to all who helped in describing this problem.

                                        Michael Richmond