photom is a collection of programs designed to take raw, instrumental measurements of stellar brightness and convert them to calibrated magnitudes on some standard system. They were written as part of the TASS Mark IV pipeline, but may work on other datasets.
Release Notes: The photometric equation has been rearranged so that the extinction coefficient now has a positive value, matching the common convention.
Release Notes: RA and Dec are now printed to 5 decimal places instead of 4 in the output .cal file. Stars marked with a non-zero quality flag in input files are now not included in the photometric solution.
Release Notes: A new command line option allows the user to specify a fixed extinction coefficient for differential corrections within each frame. This is useful for very wide field images.
Release Notes: Users may now choose the form of the photometric solution (include extinction, or don't) on the command line, without having to recompile. The solution including extinction has been fixed so that only a single zero-point term is used for all frames in a given passband.
Release Notes: Replacing calls to the CCMATH library with calls to the GNU Scientific Library, which are more robust.