2 HST.Andromeda ivo://mast.stsci/andromeda doi:10.17909/T9Q598 Space Telescope Science Institute Archive PI: Thomas Brown 1.0 Archive Branch, STScI archive@stsci.edu Observational astronomy Galactic and extragalactic astronomy optical astronomy galaxies galactic evolution star formation Using the Advanced Camera for Surveys on the Hubble Space Telescope, Thomas Brown (STScI) et al. obtained deep optical images reaching well below the oldest main sequence turnoff in six fields of the Andromeda Galaxy. The fields fall at four positions on the southeast minor axis, one position in the giant stellar stream, and one position on the northeast major axis. These data were obtained as part of three large observing programs (9453, 10265, 10816) designed to probe the star formation history of the stellar population in various structures of the galaxy. http://archive.stsci.edu/prepds/andromeda/ Archive Research 2 http://archive.stsci.edu/siap/search.php?id=andromeda& GET Pointed 360.0 360.0 360.0 360.0 0 0 205800000 12 12.26 42.74 5.0 5.0 HST ACS WFC3 Optical