Download the list of MACHO field centre coordinates above, and use these to identify the field overlapping the sky region of interest.
The sky coordinates of every star in a given field is stored in a single CSV file at the MACHO star coordinates area. Use this list to obtain the (field, tile, sequence) identifier for the star(s) of interest.
Using the field and tile identifiers obtained in the previous step, go to the store of MACHO photometry files and download the file corresponding to that (field, tile) pair. This file will contain photometry for every star within that (field, tile), including the specific star of interest identified by the (field, tile, sequence) obtained above.
See the README files in each data directory for details of file formats and further notes.
"This paper utilizes public domain data obtained by the MACHO Project,
jointly funded by the US Department of Energy through the University of
California, Lawrence Livermore National Laboratory under contract
No. W-7405-Eng-48, by the National Science Foundation through the Center
for Particle Astrophysics of the University of California under cooperative
agreement AST-8809616, and by the Mount Stromlo and Siding Spring Observatory,
part of the Australian National University."