ensemble v.1.2 - by Michael W. Richmond (C)opyright 2004,2005,2006,2007,2015,2016,2019 Michael W. Richmond, all rights reserved This package contains software which analyzes a set of measurements of many stars taken from many images. It tries to find the optimal photometric solution, allowing the zero-point of each image to float to the level which brings the stars into the best agreement. The idea behind this "inhomogeneous ensemble photometry" is described very clearly in a paper by R. Kent Honetcytt, "CCD ensemble photometry on an inhomogeneous set of exposures", in Publications of the Astronomical Society of the Pacific, volume 104, page 435 (1992). See the following URL (which should all be entered on one line) http://adsabs.harvard.edu/cgi-bin/nph-bib_query? bibcode=1992PASP..104..435H&db_key=AST&high=416a79eb0026781 INSTALLATION Follow the standard installation procedure: - uncompress the gzip'ed tar archive - cd ensemble-0.10 - ./configure - make If your system has Perl installed, you can run a quick self-test: - make check The test assumes that Perl is located in /usr/bin/perl. If it's somewhere else, simply type - perl selftest.pl If you want to copy the executables to a standard directory on your system, - make install See the documentation in "ensemble.html" for a description of the programs, the input and output formats, etc. REQUIREMENTS The software is written in ANSI C. It requires the GNU Scientific Library to be installed on your machine; if you want to fiddle with the Makefile, you can just put the GSL libraries in this directory, I suppose. The selftest script is written in Perl; it works with Perl 5.