Assigned ID: 1022 ----- Attempting Submission 1 (Sat Feb 25 00:42:25 GMT 2012) ----- HST Phase I Proposal 1022 (MWStellar.apt) successfully submitted. ----- Attempting Submission 2 (Sat Feb 25 00:58:59 GMT 2012) ----- The Hubble Legacy Archive has invested a significant effort into automatically generating photometry for point sources in all HST observations regardless of the target. We estimate that this archive contains up to 800,000 Milky Way (MW) stars, distributed across the whole sky, complete to some three magnitudes fainter than SDSS. Approximately half of these stars have color information, which is required for stellar population analysis. This considerable archive is thus in need of collation, analysis, and publication. Here we propose to compile such a catalog for public access and to use it for two science goals: 1) A test of existing MW stellar models, where we will in particular constrain the fainter and more distant stellar populations; and 2) Probe the shape and structure of the MW stellar halo with a deeper star catalog than is currently available. These science cases will be used to fully define the catalog, in particular by assessing the different populations present in the observations, and by assessing the level of noise from contaminants and the completeness of the survey UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE 12 Medium false 0.0 0.0 false false false false SUPPORTED