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Cosmology with XMM galaxy clusters: the X-CLASS/GROND catalogue and photometric redshifts.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Jun2017, Vol. 468 Issue 1, p662-684. 23p. - Publication Year :
- 2017
-
Abstract
- The XMM Cluster Archive Super Survey (X-CLASS) is a serendipitously detected X-ray-selected sample of 845 galaxy clusters based on 2774XMMarchival observations and covering an approximately 90 deg2 spread across the high-Galactic latitude (|b| > 20°) sky. The primary goal of this survey is to produce a well-selected sample of galaxy clusters on which cosmological analyses can be performed. This paper presents the photometric redshift followup of a high signal-to-noise ratio subset of 265 of these clusters with declination δ < +20° with Gamma-Ray Burst Optical and Near-Infrared Detector (GROND), a 7-channel (grizJHK) simultaneous imager on the MPG 2.2-m telescope at the ESO La Silla Observatory. We use a newly developed technique based on the red sequence colour-redshift relation, enhanced with information coming from the X-ray detection to provide photometric redshifts for this sample. We determine photometric redshifts for 232 clusters, finding a median redshift of z = 0.39 with an accuracy of Δz = 0.02(1 + z) when compared to a sample of 76 spectroscopically confirmed clusters.We also computeX-ray luminosities for the entire sample and find amedian bolometric luminosity of 7.2 × 1043 erg s-1 and a median temperature of 2.9 keV. We compare our results to those of the XMM-XCS and XMM-XXL surveys, finding good agreement in both samples. [ABSTRACT FROM AUTHOR]
- Subjects :
- *X-ray detection
*PHOTOMETRIC stereo
*REDSHIFT
*GAMMA rays
*GALAXY clusters
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 468
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 129392109
- Full Text :
- https://doi.org/10.1093/mnras/stx394