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Mehrtens, Nicola; Romer, A. Kathy; Hilton, Matt; Lloyd-Davies, E. J; Miller, Christopher J; Stanford, S. A; Hosmer, Mark; Hoyle, Ben; Collins, Chris A; Liddle, Andrew R; Viana, Pedro T. P; Nichol, Robert C; Stott, John P; Dubois, E. Naomi; Kay, Scott T; Sahlén, Martin; Young, Owain; Short, C. J; Christodoulou, L; Watson, William A; Davidson, Michael; Harrison, Craig D; Baruah, Leon; Smith, Mathew; Burke, Claire; Mayers, Julian A; Deadman, Paul-James; Rooney, Philip J; Edmondson, Edward M; West, Michael; Campbell, Heather C; Edge, Alastair C; Mann, Robert G; Sabirli, Kivanc; Wake, David; Benoist, Christophe; da Costa, Luiz; Maia, Marcio A. G; Ogando, Ricardo
Monthly Notices of the Royal Astronomical Society, June 2012, Volume: 423, Issue: 2Journal Article
The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMM-Newton 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 (T X) for 401 clusters (0.4 < T X < 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 T X (>5 keV); (iii) 130 clusters/groups with low T X (<2 keV); (iv) 27 clusters with measured T X values in the Sloan Digital Sky Survey (SDSS) 'Stripe 82' co-add region; (v) 77 clusters with measured T X 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.
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