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A Deep, Wide-Field, and Panchromatic View of 47 Tuc and the SMC with HST: Observations and Data Analysis Methods
Jason S. Kalirai, Harvey B. Richer, Jay Anderson +10
In HST Cycle 17, we imaged the well known globular star cluster 47 Tucanae for 121 orbits using ACS and both the UVIS and IR channels of WFC3 (GO-11677, PI - H. Richer). This uniqu…
The Spectral Energy Distributions of White Dwarfs in 47 Tucanae: The Distance to the Cluster
K. A. Woodley, R. Goldsbury, J. S. Kalirai +13
We present a new distance determination to the Galactic globular cluster 47 Tucanae by fitting the spectral energy distributions of its white dwarfs to pure hydrogen atmosphere whi…
The SPLASH Survey: Spectroscopy of 15 M31 Dwarf Spheroidal Satellite Galaxies
Erik J. Tollerud, Rachael L. Beaton, Marla C. Geha +13
We present a resolved-star spectroscopic survey of 15 dwarf spheroidal (dSph) satellites of the Andromeda Galaxy (M31) as part of the Spectroscopic and Photometric Landscape of And…
An Unexpected Discovery in the Rich Open Cluster NGC 6819 Using XMM-Newton
Natalie M. Gosnell, David Pooley, Aaron M. Geller +4
We present the first study of the X-ray population of the intermediate-age rich open cluster NGC 6819 using the XMM-Newton Observatory. In the past decade, Chandra X-ray observatio…
Very Early Ultraviolet and Optical Observations of the Type Ia Supernova 2009ig
Ryan J. Foley, P. J. Challis, A. V. Filippenko +18
Supernova (SN) 2009ig was discovered 17 hours after explosion by the Lick Observatory Supernova Search, promptly classified as a normal Type Ia SN (SN Ia), peaked at V = 13.5 mag,…
Structure and Population of the NGC55 Stellar Halo from a Subaru/Suprime-Cam Survey
Mikito Tanaka, Masashi Chiba, Yutaka Komiyama +2
As part of our survey of galactic stellar halos, we investigate the structure and stellar populations of the northern outer part of the stellar halo in NGC55, a member galaxy of th…