The HST/ACS Survey of Galactic Globular Clusters

Ata Sarajedini

The HST/ACS Survey of Galactic globular clusters (GC) is a Treasury project designed to obtain photometry with S/N >= 10 for main sequence stars with masses >= 0.2M_sun in a large sample of globulars using the Advanced Camera for Surveys (ACS) Wide Field Channel. The survey will produce an image atlas and source catalog with astrometry and photometry for stars in the target clusters using both newly obtained ACS observations as well as archival ACS and Wide Field Planetary Camera 2 imaging, where available. In the spirit of the HST Treasury concept, the overall goal of this "legacy" survey is to investigate fundamental aspects of Galactic GCs (e.g., luminosity functions, reddenings, distances, ages, proper motions, binary fractions, to name a few) and provide a lasting contribution to cluster studies by creating a uniquely deep and uniform database of a large sample of Galactic GCs. I will present an overview of the project as well as some the most recent results.