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The HST/ACS Coma Cluster Survey. II. Data Description and Source Catalogs

Hammer, D and Kleijn, GV and Hoyos, C and Brok, MD and Balcells, M and Ferguson, HC and Goudfrooij, P and Carter, D and Guzman, R and Peletier, RF and Smith, RJ and Graham, AW and Trentham, N and Peng, E and Puzia, TH and Lucey, JR and Jogee, S and Aguerri, AL and Batcheldor, D and Bridges, TJ and Davies, JI and Burgo, CD and Erwin, P and Hornschemeier, A and Hudson, MJ and Huxor, A and Jenkins, L and Karick, A and Khosroshahi, H and Kourkchi, E and Komiyama, Y and Lotz, J and Marzke, RO and Marinova, I and Matkovic, A and Merritt, D and Miller, BW and Miller, NA and Mobasher, B and Mouhcine, M and Okamura, S and Percival, SM and Phillipps, S and Poggianti, BM and Price, J and Sharples, RM and Tully, RB and Valentijn, E (2010) The HST/ACS Coma Cluster Survey. II. Data Description and Source Catalogs. The Astrophysical Journal Supplement Series, 191 (1). pp. 143-159. ISSN 1538-4365

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Abstract

The Coma cluster 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 2007, the partially completed survey still covers ~50% of the core high-density region in Coma. Observations were performed for 25 fields that extend over a wide range of cluster-centric radii (~1.75 Mpc) with a total coverage area of 274 arcmin^2. 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 reprocessed images and SExtractor source catalogs for our survey fields, 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 half-light radius. We have performed photometry for ~73,000 unique objects; one-half of our detections are brighter than the 10-sigma point-source detection limit at F814W=25.8 mag (AB). The slight majority of objects (60%) are unresolved or only marginally resolved by ACS. We estimate that Coma members are 5-10% of all source detections, which consist of a large population of unresolved objects (primarily GCs but also UCDs) and a wide variety of extended galaxies from a cD galaxy to dwarf LSB galaxies. The red sequence of Coma member galaxies has a constant slope and dispersion across 9 magnitudes (-21<M_F814W<-13). The initial data release for the HST-ACS Coma Treasury program was made available to the public in 2008 August. The images and catalogs described in this study relate to our second data release.

Item Type: Article
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Related URLs:
Date Deposited: 14 Nov 2016 11:09
Last Modified: 08 Sep 2017 09:27
DOI or Identification number: 10.1088/0067-0049/191/1/143
URI: http://researchonline.ljmu.ac.uk/id/eprint/4801

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