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The ACS nearby galaxy survey treasury


Dalcanton, JJ and Williams, BF and Seth, AC and Dolphin, A and Holtzman, J and Rosema, K and Skillman, ED and Cole, AA and Girardi, L and Gogarten, SM and Karachentsev, ID and Olsen, K and Weisz, D and Christennsen, C and Freeman, K and Gilbert, K and Gallart, C and Harris, J and Hodge, P and De Jong, R and Karachentseva, V and Mateo, M and Stetson, PB and Tavarez, M and Zaritsky, D and Governato, F and Quinn, T, The ACS nearby galaxy survey treasury, Astrophysical Journal. Supplement Series, 183, (1) pp. 67-108. ISSN 0067-0049 (2009) [Refereed Article]

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DOI: doi:10.1088/0067-0049/183/1/67


The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multicolor photometry of resolved stars for a volume-limited sample of nearby galaxies (D < 4Mpc). The survey volume encompasses 69 galaxies in diverse environments, including close pairs, small and large groups, filaments, and truly isolated regions. The galaxies include a nearly complete range of morphological types spanning a factor of ¡­104 in luminosity and star formation rate. The survey data consist of images taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST), supplemented with archival data and new Wide Field Planetary Camera 2 (WFPC2) imaging taken after the failure of ACS. Survey images include wide field tilings covering the full radial extent of each galaxy, and single deep pointings in uncrowded regions of the most massive galaxies in the volume. The new wide field imaging in ANGST reaches median 50% completenesses of mF475W =28.0 mag, mF606W=27.3 mag, and mF814W=27.3 mag, several magnitudes below the tip of the red giant branch (TRGB). The deep fields reach magnitudes sufficient to fully resolve the structure in the red clump. The resulting photometric catalogs are publicly accessible and contain over 34 million photometric measurements of >14 million stars. In this paper we present the details of the sample selection, imaging, data reduction, and the resulting photometric catalogs, along with an analysis of the photometric uncertainties (systematic and random), for bothACS and WFPC2 imaging.We also present uniformly derived relative distances measured from the apparent magnitude of the TRGB.

Item Details

Item Type:Refereed Article
Keywords:catalogs – galaxies: formation – galaxies: stellar content – surveys
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Cosmology and extragalactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Cole, AA (Professor Andrew Cole)
ID Code:71039
Year Published:2009
Web of Science® Times Cited:410
Deposited By:Physics
Deposited On:2011-07-07
Last Modified:2011-07-07

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