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Title:
BLOX: the Bonn lensing, optical, and X-ray selected galaxy clusters. I. Cluster catalog construction
Authors:
Dietrich, J. P.; Erben, T.; Lamer, G.; Schneider, P.; Schwope, A.; Hartlap, J.; Maturi, M.
Affiliation:
AA(Argelander-Institut für Astronomie, University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany ; ESO, Karl-Schwarzschild-Str. 2, 85748 Garching b. München, Germany), AB(Argelander-Institut für Astronomie, University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany), AC(Astrophysikalisches Institut Potsdam, An der Sternwarte 14, 14482 Potsdam, Germany), AD(Argelander-Institut für Astronomie, University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany), AE(Astrophysikalisches Institut Potsdam, An der Sternwarte 14, 14482 Potsdam, Germany), AF(Argelander-Institut für Astronomie, University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany), AG(Institut für Theoretische Astrophysik, Albert-Ueberle-Str. 2, 69120 Heidelberg, Germany)
Publication:
Astronomy and Astrophysics, Volume 470, Issue 3, August II 2007, pp.821-834 (A&A Homepage)
Publication Date:
08/2007
Origin:
EDP
Keywords:
gravitational waves, galaxies: clusters: general, X-rays: galaxies: clusters, catalogs, surveys
DOI:
10.1051/0004-6361:20077281
Bibliographic Code:
2007A&A...470..821D

Abstract

The mass function of galaxy clusters is an important cosmological probe. Differences in the selection method could potentially lead to biases when determining the mass function. From the optical and X-ray data of the XMM-Newton Follow-Up Survey, we obtained a sample of galaxy cluster candidates using weak gravitational lensing, the optical Postman matched filter method, and a search for extended X-ray sources. We developed our weak-lensing search criteria by testing the performance of the aperture mass statistic on realistic ray-tracing simulations matching our survey parameters and by comparing two filter functions. We find that the dominant noise source for our survey is shape noise at almost all significance levels and that spurious cluster detections due to projections of large-scale structures are negligible, except possibly for highly significantly detected peaks. Our full cluster catalog has 155 cluster candidates, 116 found with the Postman matched filter, 59 extended X-ray sources, and 31 shear selected potential clusters. Most of these cluster candidates were not previously known. The present catalog will be a solid foundation for studying possible selection effects in either method.

Based on observations carried out at the European Southern Observatory, La Silla, Chile under program Nos. 170.A-0789, 70.A-0529, 71.A-0110, 072.A-0061, 073.A-0050. The cluster catalogs are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg/cgi-bin/qcat?J/A+A/470/821

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