BRIGHTEST X-RAY CLUSTERS OF GALAXIES IN THE CFHTLS WIDE FIELDS: CATALOG AND OPTICAL MASS ESTIMATOR

Journal Article · Mon Jan 19 23:00:00 EST 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/799/1/60· OSTI ID:22364477

Mirkazemi, M.; Finoguenov, A.; Lerchster, M.; Erfanianfar, G.; Seitz, S. ^[1]; Pereira, M. J.; Egami, E. ^[2]; Tanaka, M. ^[3]; Brimioulle, F. ^[4]; Kettula, K. ^[5]; McCracken, H. J.; Mellier, Y. ^[6]; Kneib, J. P. ^[7]; Rykoff, E. ^[8]; Erben, T. ^[9]

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1. Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, D-85740 Garching (Germany)
2. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
3. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)
4. Universitätssternwarte München, Scheinerstrasse 1, D-81679 München (Germany)
5. Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, FI-00014 Helsinki (Finland)
6. Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre et Marie Curie, 98 bis Boulevard Arago, F-75014 Paris (France)
7. Laboratoire d'Astrophysique de Marseille, CNRS-Université, Ple de l'Etoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie, F-13388 Marseille Cedex 13 (France)
8. SLAC National Accelerator Laboratory, Menlo Park, CA 94025 (United States)
9. Argelander Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn (Germany)

The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) presents a unique data set for weak-lensing studies, having high-quality imaging and deep multiband photometry. We have initiated an XMM-CFHTLS project to provide X-ray observations of the brightest X-ray-selected clusters within the wide CFHTLS area. Performance of these observations and the high quality of CFHTLS data allow us to revisit the identification of X-ray sources, introducing automated reproducible algorithms, based on the multicolor red sequence finder. We have also introduced a new optical mass proxy. We provide the calibration of the red sequence observed in the Canada-France-Hawaii filters and compare the results with the traditional single-color red sequence and photo-z. We test the identification algorithm on the subset of highly significant XMM clusters and identify 100% of the sample. We find that the integrated z-band luminosity of the red sequence galaxies correlates well with the X-ray luminosity, with a surprisingly small scatter of 0.20 dex. We further use the multicolor red sequence to reduce spurious detections in the full XMM and ROSAT All-Sky Survey (RASS) data sets, resulting in catalogs of 196 and 32 clusters, respectively. We made spectroscopic follow-up observations of some of these systems with HECTOSPEC and in combination with BOSS DR9 data. We also describe the modifications needed to the source detection algorithm in order to maintain high purity of extended sources in the shallow X-ray data. We also present the scaling relation between X-ray luminosity and velocity dispersion.

• OSTI ID: 22364477
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 799; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ALGORITHMS
CALIBRATION
COLOR
COMPARATIVE EVALUATIONS
COSMIC X-RAY SOURCES
COSMOLOGY
DETECTION
GALAXY CLUSTERS
LUMINOSITY
MASS
PHOTOMETRY
STAR CLUSTERS
TELESCOPES
X RADIATION
X-RAY GALAXIES