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The ACS Survey of Galactic Globular Clusters. VII. Relative Ages
Antonio Marin-Franch, Antonio Aparicio, Giampaolo Piotto +13
The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program designed to provide a new large, deep and homogeneous photometric database. Based on…
An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
Jay Anderson, Ata Sarajedini, Luigi R. Bedin +10
The ACS Survey of Globular Clusters has used HST's Wide-Field Channel to obtain uniform imaging of 65 of the nearest globular clusters to provide an extensive homogeneous dataset f…
The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
A. P. Milone, L. R. Bedin, G. Piotto +13
Photometry with HST's ACS reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an age effect,…
Deep ACS Imaging in the Globular Cluster NGC 6397: The Cluster Color Magnitude Diagram and Luminosity Function
Harvey B. Richer, Aaron Dotter, Jarrod Hurley +9
We present the CMD from deep HST imaging in the globular cluster NGC 6397. The ACS was used for 126 orbits to image a single field in two colors (F814W, F606W) 5 arcmin SE of the c…
BVI Photometry and the Luminosity Function of the Globular Cluster M92
N. E. Q. Paust, B. Chaboyer, A. Sarajedini
We present new BVI ground-based photometry and VI space-based photometry for the globular cluster M92 (NGC 6341) and examine luminosity functions in B, V, and I containing over 50,…
A New Color-Magnitude Diagram for Palomar 11
M. S. Lewis, W. M. Liu, N. E. Q. Paust +1
We present new photometry for the Galactic thick disk globular cluster Palomar 11 extending well past the main sequence turn-off in the V and I bands. This photometry shows noticea…