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The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters Without Previous HST Photometry
Ata Sarajedini, L. Bedin, B. Chaboyer +10
We present the first results of a large ACS Survey of Galactic globular clusters. This Hubble Space Telescope (HST) Treasury project is designed to obtain photometry with S/N > ~10…
Characterization of Gravitational Microlensing Planetary Host Stars
David P. Bennett, Jay Anderson, B. Scott Gaudi
The gravitational microlensing light curves that reveal the presence of extrasolar planets generally yield the planet-star mass ratio and separation in units of the Einstein ring r…
HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae
Dean E. McLaughlin, Jay Anderson, Georges Meylan +4
We have used HST imaging of the central regions (R<100 arcsec, about 5 core radii) of the globular cluster 47 Tucanae to derive proper motions and U- and V-band magnitudes for 14,3…
Lensing signals in the Hubble Ultra-Deep Field using all 2nd order shape deformations
John Irwin, Marina Shmakova, Jay Anderson
The long exposure times of the HST Ultra-Deep Field plus the use of an empirically derived position-dependent PSF, have enabled us to measure a cardioid/displacement distortion map…
Identification of the OGLE-2003-BLG-235/MOA-2003-BLG-53 Planetary Host Star
David P. Bennett, Jay Anderson, Ian A. Bond +2
We present the results of HST observations of the host star for the first definitive extrasolar planet detected by microlensing. The light curve model for this event predicts that…