The XMM-BCS galaxy cluster survey I. The X-ray selected cluster catalog from the initial 6 deg2

被引：40
作者：
Suhada, R. [1 ,2 ]
Song, J. [3 ]
Boehringer, H. [1 ]
Mohr, J. J. [1 ,2 ,4 ]
Chon, G. [1 ]
Finoguenov, A. [1 ,5 ]
Fassbender, R. [1 ,5 ]
Desai, S. [1 ,6 ]
Armstrong, R. [7 ]
Zenteno, A. [2 ,4 ]
Barkhouse, W. A. [8 ]
Bertin, E. [9 ]
Buckley-Geer, E. J. [10 ]
Hansen, S. M. [11 ,12 ]
High, F. W. [13 ]
Lin, H. [10 ]
Muehlegger, M. [1 ]
Ngeow, C. C. [14 ]
Pierini, D.
Pratt, G. W. [15 ]
Verdugo, M. [1 ]
Tucker, D. L. [10 ]
机构：
[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[2] Univ Munich, Dept Phys, D-81679 Munich, Germany
[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[4] Excellence Cluster Univ, D-85748 Garching, Germany
[5] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA
[6] Univ Illinois, Dept Astron, Urbana, IL 61801 USA
[7] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[8] Univ N Dakota, Dept Phys & Astrophys, Grand Forks, ND 58202 USA
[9] Univ Paris 06, CNRS, UMR 7095, Inst Astrophys, F-75014 Paris, France
[10] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[11] Univ Calif Santa Cruz, Dept Astron, Santa Cruz, CA 95064 USA
[12] Univ Calif Santa Cruz, Univ Calif Observ, Santa Cruz, CA 95064 USA
[13] Univ Chicago, Chicago, IL USA
[14] Natl Cent Univ, Grad Inst Astron, Jhongli 32001, Taiwan
[15] Univ Paris Diderot, CNRS, CEA DSM, CEA Saclay,Lab AIM,IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France
来源：
ASTRONOMY & ASTROPHYSICS | 2012年 / 537卷
基金：
美国国家科学基金会;
关键词：
large-scale structure of Universe; galaxies: clusters: general; surveys; catalogs; SCALING RELATIONS; LENSING MEASUREMENTS; OBSERVED GROWTH; SAMPLE; MASS; EVOLUTION; PROFILES; REDSHIFT; REXCESS; CHANDRA;
D O I：
10.1051/0004-6361/201117214
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The XMM-Newton-Blanco Cosmology Survey project (XMM-BCS) is a coordinated X-ray, optical and mid-infrared cluster survey in a field also covered by Sunyaev-Zel'dovich effect (SZE) surveys by the South Pole Telescope and the Atacama Cosmology Telescope. The aim of the project is to study the cluster population in a 14 deg(2) field (center: alpha approximate to 23:29:18.4, delta approximate to -54:40:33.6). The uniform multi-wavelength coverage will also allow us for the first time to comprehensively compare the selection function of the different cluster detection approaches in a single test field and perform a cross-calibration of cluster scaling relations. In this work, we present a catalog of 46 X-ray selected clusters from the initial 6 deg(2) survey core. We describe the XMM-BCS source detection pipeline and derive physical properties of the clusters. We provide photometric redshift estimates derived from the BCS imaging data and spectroscopic redshift measurements for a low redshift subset of the clusters. The photometric redshift estimates are found to be unbiased and in good agreement with the spectroscopic values. Our multi-wavelength approach gives us a comprehensive look at the cluster and group population up to redshifts z approximate to 1. The median redshift of the sample is 0.47 and the median mass M-500 approximate to 1x10(14) M-circle dot (similar to 2 keV). From the sample, we derive the cluster log N - log S using an approximation to the survey selection function and find it in good agreement with previous studies. We compare optical mass estimates from the Southern Cosmology Survey available for part of our cluster sample with our estimates derived from the X-ray luminosity. Weak lensing masses available for a subset of the cluster sample are in agreement with our estimates. Optical masses based on cluster richness and total optical luminosity are found to be significantly higher than the X-ray values. The present results illustrate the excellent potential of medium-deep, X-ray surveys to deliver cluster samples for cosmological modelling. In combination with available multi-wavelength data in optical, near-infrared and SZE, this will allow us to probe the dependence of the selection functions on relevant cluster observables and provide thus an important input for upcoming large-area multi-wavelength cluster surveys.
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页数：30
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