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The XMM Cluster Survey: optical analysis methodology and the first data release
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2012 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 423, no 2, 1024-1052 p.Article in journal (Refereed) Published
Abstract [en]

The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMMNewton Science Archive. Its main aims are to measure cosmological parameters and trace the evolution of X-ray scaling relations. In this paper we present the first data release from the XMM Cluster Survey (XCS-DR1). This consists of 503 optically confirmed, serendipitously detected, X-ray clusters. Of these clusters, 256 are new to the literature and 357 are new X-ray discoveries. We present 463 clusters with a redshift estimate (0.06 < z < 1.46), including 261 clusters with spectroscopic redshifts. The remainder have photometric redshifts. In addition, we have measured X-ray temperatures (TX) for 401 clusters (0.4 < TX < 14.7 keV). We highlight seven interesting subsamples of XCS-DR1 clusters: (i) 10 clusters at high redshift (z > 1.0, including a new spectroscopically confirmed cluster at z= 1.01); (ii) 66 clusters with high TX (>5 keV); (iii) 130 clusters/groups with low TX (<2 keV); (iv) 27 clusters with measured TX values in the Sloan Digital Sky Survey (SDSS) Stripe 82 co-add region; (v) 77 clusters with measured TX values in the Dark Energy Survey region; (vi) 40 clusters detected with sufficient counts to permit mass measurements (under the assumption of hydrostatic equilibrium); (vii) 104 clusters that can be used for applications such as the derivation of cosmological parameters and the measurement of cluster scaling relations. The X-ray analysis methodology used to construct and analyse the XCS-DR1 cluster sample has been presented in a companion paper, Lloyd-Davies et al.

Place, publisher, year, edition, pages
2012. Vol. 423, no 2, 1024-1052 p.
Keyword [en]
techniques: photometric, techniques: spectroscopic, surveys, galaxies: clusters: individual: XMMXCS J091821, 9+211446, 0, galaxies: distances and redshifts, X-rays: galaxies: clusters
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-79895DOI: 10.1111/j.1365-2966.2012.20931.xISI: 000305070900004OAI: diva2:551779


Available from: 2012-09-12 Created: 2012-09-11 Last updated: 2012-09-12Bibliographically approved

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Sahlén, Martin
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The Oskar Klein Centre for Cosmo Particle Physics (OKC)Department of Physics
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