new version of Mark IV pipeline and associated files

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

  I've completed a "beta" version of Mark IV pipeline and associated
files and programs.  Can any brave readers try to download and run
it, so that I can fix the last few errors? 

  The major changes are:
   
      1. the astrometric and photometric reference catalog is now
         much larger: it contains over 1.4 million stars from the
         Tycho-2 catalog.  I relaxed the permitted uncertainty 
         in Tycho-2 magnitudes from 0.05 mag to 0.20 mag.  The
         new version provides many more stars as possible matches
         in each Mark IV field, which improves the success rate
         in the astrometric calibration.

      2. the pipeline now properly uses pseudo-V-band magnitudes
         from the reference catalog when matching against V-band
         Mark IV images, and pseudo-I-band magnitudes when
         matching against I-band images.  This also improves
         the chances for success.

      3. the "photom" program now calls numerical routines from the
         GNU Scientific Library, rather than the CCMATH library.
         The GSL routines are more robust; at least, they have succeeded
         on all the actual Mark IV data I've provided as input,
         whereas the CCMATH routines failed in some cases.

         This means one must install the GSL package on one's 
         computer before one can make the "photom" executables.
         Those with recent Linux systems who just want to run
         the programs can try to download executables from my
         machine (RedHat 6.2) at 

               http://spiff.rit.edu/tass/photom/photom-0.3/

  I've verified that the pipeline will run properly on data taken by Tom
Dreoge on Feb 6, 2002 (020206 dataset).   It also runs on the old
testbed dataset I've used in the past.  

  You can find the programs in the same places as before.  Read the
manual for the pipeline, at

        http://spiff.rit.edu/tass/pipeline/pipeline.html

and follow instructions therein.

  Please give me feedback.  If you find a case in which something
goes wrong, give me the context I need (i.e. the datafiles) to fix it.

                                         Michael Richmond