version 0.4 3/2/2005 Minor enhancements: 'multipht' has quiet mode: no list of frame-by-frame matches command-line options to specify requirements for images and stars to be included in ensemble 'solvepht' fits model to sigma-vs-mag can automatically classify stars as variable can iterate over ensemble solution several times additional columns of information in output files version 0.3 12/13/2004 Major improvement: replaced Numerical Recipes routines in "solvematrix.c" with equivalent SVD routines from the GNU Scientific Library (which is now required to be on your system) Also fixed very minor bugs in the selftest.pl script. version 0.2 11/21/2004 Minor improvements: can now handle more stars (10000) and images (3000) matrix is now built more efficiently, without including stars and images which are not part of the solution solvepht's "min=" and "max=" options now work properly version 0.1 11/08/2004 Initial release of the package. Includes the two main programs "multipht" and "solvepht", plus a test Perl script "selftest.pl". The current code uses a somewhat fragile set of routines to handle the matrix algebra in "solvematrix.c". It will fail on some -- but not all -- machines if compiled with option "-O2", which is the default in many cases. I have arranged the distribution so that the compiler flags are forced to be "-g -Wall" to prevent this from happening. The long-term solution is to replace these routines with more robust code, perhaps from the GNU Scientific Library.