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The XMM Cluster Survey: optical analysis methodology and the first data release

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

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Nicola Mehrtens

A. Kathy Romer

Matt Hilton

E.J. Lloyd-Davies

Christopher J. Miller

S.A. Stanford

Mark Hosmer

Ben Hoyle

Chris A. Collins

Andrew R. Liddle

Pedro T.P. Viana

Robert C. Nichol

John P. Stott

E. Naomi Dubois

Scott T. Kay

Martin Sahlén

Owain Young

C.J. Short

L. Christodoulou

William A. Watson

Michael Davidson

Craig D. Harrison

Leon Baruah

Mathew Smith

Claire Burke

Julian A. Mayers

Paul-James Deadman

Philip J. Rooney

Edward M. Edmondson

Michael West

Heather C. Campbell

Robert G. Mann

Kivanc Sabirli

David Wake

Christophe Benoist

Luiz da Costa

Marcio A.G. Maia

Ricardo Ogando


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 (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.


Mehrtens, N., Romer, A. K., Hilton, M., Lloyd-Davies, E., Miller, C. J., Stanford, S., …Ogando, R. (2012). The XMM Cluster Survey: optical analysis methodology and the first data release. Monthly Notices of the Royal Astronomical Society, 423(2), 1024-1052.

Journal Article Type Article
Publication Date Jun 1, 2012
Deposit Date Apr 8, 2013
Publicly Available Date Nov 26, 2013
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 423
Issue 2
Pages 1024-1052
Keywords Techniques, Photometric, Spectroscopic, Surveys, Galaxies, Clusters, XMMXCS J091821.9+211446.0, Distances and redshifts, X-rays.


Published Journal Article (8.1 Mb)

Copyright Statement
This article has been published in the Monthly Notices of the Royal Astronomical Society <br /> © 2012 The Authors.<br /> Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.

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