Distant clusters of galaxies in a deep XMM‐Newton observation. Issue 4 (2nd May 2013)

• Record Type: Journal Article
• Authors: de Hoon, A.; Lamer, G.; Schwope, A.; Mühlegger, M.; Fassbender, R.; Böhringer, H.; Lerchster, M.; Nastasi, A.; Šuhada, R.; Rosati, P.; Pierini, D.; Santos, J.S.; Quintana, H.; Schartel, Norbert
• Is Part Of: Astronomische Nachrichten. Volume 334:Issue 4/5(2013)
• Page Start: 470
• Page End: 473
• Publication Date: 2013-05-02
• Subjects: Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.201211883
• Languages: English
• ISSNs: 0004-6337

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The XMM‐Newton Distant Cluster Project (XDCP) aims at the identification of a well defined sample of X‐ray selected clusters of galaxies at redshifts <italic>z</italic> ≥ 0.8. As part of this project, we analyse the deep archival XMM‐<italic>Newton</italic> exposure of LBQS 2212–1759 to quantify the cluster content. We validate the optical follow‐up strategy as well as the X‐ray selection function. We base the cluster identification of the extended X‐ray sources on deep imaging with the ESO‐VLT and on the CFHT‐LS. The confirmation of cluster candidates is done by VLT/FORS2 spectroscopy. Photometric redshifts from CFTH‐LS D4 are utilised to confirm the effectiveness of the X‐ray cluster selection method. The survey sensitivity is computed to have a flux limit of <italic>S</italic>_{0.5–2.0 keV} ∼ 2.5×10^–15 erg s^–1 for 50% completeness in an area ∼0.13 deg². We detect six clusters of galaxies above this level both in X‐rays and the optical. Two newly discovered X‐ray luminous clusters of galaxies in this work are at <italic>z</italic> ≥ 1.0 and one is at <italic>z</italic> = 0.41. The constructed log <italic>N</italic> ‐log <italic>S</italic> tends to favour a scenario where no evolution in the cluster X‐ray luminosity function takes place. (© 2013 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)</p> </abstract>