Blue Straggler Star Populations in Globular Clusters: II. Proper-Motion
  Cleaned HST Catalogs of BSSs in 38 Galactic GCs
  We present new Blue Straggler Star (BSS) catalogs in 38 Milky Way globular
clusters (GCs) based on multi-passband and multi-epoch treasury survey data
from the Hubble Space Telescope. We measure precise astrometry and relative
proper motions of stars in all target clusters and performed a subsequent
cluster membership selection. We study the accuracy of our proper motion
measurements using estimates of central velocity dispersions and find very good
agreement with previous studies in the literature. Finally, we present a
homogeneous BSS selection method, that expands the classic BSS selection
parameter space to more evolved BSS evolutionary stages. We apply this method
to the proper-motion cleaned GC star catalogs in order to define proper-motion
cleaned BSS catalogs in all 38 GCs, which we make publicly available to enable
further study and follow-up observations.
