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The HST/ACS Coma Cluster Survey. II. Data Description and Source CatalogsThe Coma cluster, Abell 1656, was the target of a HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially-completed survey still covers approximately 50% of the core high density region in Coma. Observations were performed for twenty-five fields with a total coverage area of 274 aremin(sup 2), and extend over a wide range of cluster-centric radii (approximately 1.75 Mpe or 1 deg). The majority of the fields are located near the core region of Coma (19/25 pointings) with six additional fields in the south-west region of the cluster. In this paper we present SEXTRACTOR source catalogs generated from the processed images, including a detailed description of the methodology used for object detection and photometry, the subtraction of bright galaxies to measure faint underlying objects, and the use of simulations to assess the photometric accuracy and completeness of our catalogs. We also use simulations to perform aperture corrections for the SEXTRACTOR Kron magnitudes based only on the measured source flux and its half-light radius. We have performed photometry for 76,000 objects that consist of roughly equal numbers of extended galaxies and unresolved objects. Approximately two-thirds of all detections are brighter than F814W=26.5 mag (AB), which corresponds to the 10sigma, point-source detection limit. We estimate that Coma members are 5-10% of the source detections, including a large population of compact objects (primarily GCs, but also cEs and UCDs), and a wide variety of extended galaxies from cD galaxies to dwarf low surface brightness galaxies. The initial data release for the HST-ACS Coma Treasury program was made available to the public in August 2008. The images and catalogs described in this study relate to our second data release.
Document ID
20100020215
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Hammer, Derek
(Johns Hopkins Univ. Baltimore, MD, United States)
Kleijn, Gijs Verdoes
(Groningen Rijksuniv. Netherlands)
Hoyos, Carlos
(Nottingham Univ. United Kingdom)
Den Brok, Mark
(Groningen Rijksuniv. Netherlands)
Balcells, Marc
(Instituto de Astrofisica de Canarias Tenerife, Spain)
Ferguson, Henry C.
(Space Telescope Science Inst. Baltimore, MD, United States)
Goudfrooij, Paul
(Space Telescope Science Inst. Baltimore, MD, United States)
Carter, David
(Liverpool John Moores Univ. Liverpool, United Kingdom)
Guzman, Rafael
(Florida Univ. Gainesville, FL, United States)
Peletier, Reynier F.
(Groningen Rijksuniv. Netherlands)
Smith, Russell J.
(Durham Univ. United Kingdom)
Graham, Alister W.
(Swinburne Univ. of Technology Hawthorn, Australia)
Trentham, Neil
(Institute of Astronomy Cambridge, United Kingdom)
Peng, Eric
(Peking Univ. Beijing, China)
Puzia, Thomas H.
(Herzberg Inst. of Astrophysics Victoria, British Columbia, Canada)
Lucey, John R.
(Durham Univ. United Kingdom)
Jogee, Shardha
(Texas Univ. Austin, TX, United States)
Aguerri, Alfonso L.
(Instituto de Astrofisica de Canarias Tenerife, Spain)
Batcheldor, Dan
(Rochester Inst. of Tech. Rochester, NY, United States)
Bridges, Terry J.
(Queens Univ. Kingston, Ontario, Canada)
Davies, Jonathan I.
(Cardiff Univ. United Kingdom)
Del Burgo, Carlos
(Dublin Inst. for Advanced Studies Ireland)
Erwin, Peter
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Hornschemeier, Ann
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hudson, Michael J.
(Waterloo Univ. Ontario, Canada)
Date Acquired
August 24, 2013
Publication Date
March 23, 2010
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: PP/E001149/1
CONTRACT_GRANT: HST-GO-10861
CONTRACT_GRANT: AYA2006-12955
CONTRACT_GRANT: HST-E0-10861.35-A
CONTRACT_GRANT: NNG04GB78A
CONTRACT_GRANT: NNX07AH15G
Distribution Limits
Public
Copyright
Public Use Permitted.
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