THE ACS NEARBY GALAXY SURVEY TREASURY

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/183/1/67; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21269143

Dalcanton, Julianne J; Williams, Benjamin F; Rosema, Keith; Gogarten, Stephanie M; Christensen, Charlotte; Gilbert, Karoline; Hodge, Paul ^[1]; Seth, Anil C ^[2]; Dolphin, Andrew ^[3]; Holtzman, Jon ^[4]; Skillman, Evan D; Weisz, Daniel ^[5]; Cole, Andrew ^[6]; Girardi, Leo ^[7]; Karachentsev, Igor D ^[8]; Olsen, Knut ^[9]; Freeman, Ken ^[10]; Gallart, Carme ^[11]; Harris, Jason ^[12]

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1. Department of Astronomy, Box 351580, University of Washington, Seattle, WA 98195 (United States)
2. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
3. Raytheon, 1151 E. Hermans Road, Tucson, AZ 85756 (United States)
4. Department of Astronomy, New Mexico State University, Box 30001, 1320 Frenger St., Las Cruces, NM 88003 (United States)
5. Department of Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 (United States)
6. School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania (Australia)
7. Osservatorio Astronomico di Padova - INAF, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy)
8. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnji Arkhyz, Karachai-Circessia Republic 369167 (Russian Federation)
9. NOAO, National Optical Astronomy Observatory 950 N. Cherry Ave., Tucson, AZ 85719 (United States)
10. Mount Stromlo Observatory, Research School of Astronomy and Astrophysics, The Australian National Univ., ACT 0200 (Australia)
11. Inst. de AstrofIsica de Canarias, VIa Lactea, s/n, 38200 La Laguna, Tenerife (Spain)
12. Steward Observatory, Univ. of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D < 4 Mpc). 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 {approx}10{sup 4} 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 m {sub F475W} = 28.0 mag, m {sub F606W} = 27.3 mag, and m {sub F814W} = 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 both ACS and WFPC2 imaging. We also present uniformly derived relative distances measured from the apparent magnitude of the TRGB.

• OSTI ID: 21269143
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 1 Vol. 183; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
99 GENERAL AND MISCELLANEOUS
CAMERAS
CATALOGS
COLOR
GALAXIES
IMAGES
LUMINOSITY
PHOTOMETRY
RANDOMNESS
STARS
TELESCOPES