The XXL Survey: XX. The 365 cluster catalogue
Journal article, 2018
Context. In the currently debated context of using clusters of galaxies as cosmological probes, the need for well-defined cluster samples is critical. Aims. The XXL Survey has been specifically designed to provide a well characterised sample of some 500 X-ray detected clusters suitable for cosmological studies. The main goal of present article is to make public and describe the properties of the cluster catalogue in its present state, as well as of associated catalogues of more specific objects such as super-clusters and fossil groups. Methods. Following from the publication of the hundred brightest XXL clusters, we now release a sample containing 365 clusters in total, down to a flux of a few 10-15 erg s-1 cm-2 in the [0.5-2] keV band and in a 1′ aperture. This release contains the complete subset of clusters for which the selection function is well determined plus all X-ray clusters which are, to date, spectroscopically confirmed. In this paper, we give the details of the follow-up observations and explain the procedure adopted to validate the cluster spectroscopic redshifts. Considering the whole XXL cluster sample, we have provided two types of selection, both complete in a particular sense: one based on flux-morphology criteria, and an alternative based on the [0.5-2] keV flux within 1 arcmin of the cluster centre. We have also provided X-ray temperature measurements for 80% of the clusters having a flux larger than 9 × 10-15 erg s-1 cm-2. Results. Our cluster sample extends from z ∼ 0 to z ∼ 1.2, with one cluster at z ∼ 2. Clusters were identified through a mean number of six spectroscopically confirmed cluster members. The largest number of confirmed spectroscopic members in a cluster is 41. Our updated luminosity function and luminosity-temperature relation are compatible with our previous determinations based on the 100 brightest clusters, but show smaller uncertainties. We also present an enlarged list of super-clusters and a sample of 18 possible fossil groups. Conclusions. This intermediate publication is the last before the final release of the complete XXL cluster catalogue when the ongoing C2 cluster spectroscopic follow-up is complete. It provides a unique inventory of medium-mass clusters over a 50 deg2 area out to z ∼ 1.
Galaxies: groups: general
Galaxies: clusters: general
Large-scale structure of Universe
Galaxies: clusters: intracluster medium
Author
C. Adami
Laboratoire d'Astrophysique de Marseille
P. Giles
University of Bristol
E. Koulouridis
Institut de Recherche sur les Lois Fondamentales de l'Univers
F. Pacaud
University of Bonn
C. Caretta
Universidad de Guanajuato
Laboratoire d'Astrophysique de Marseille
M. Pierre
Institut de Recherche sur les Lois Fondamentales de l'Univers
D. Eckert
University of Geneva
M. E. Ramos-Ceja
University of Bonn
F. Gastaldello
Istituto nazionale di astrofisica (INAF)
S. Fotopoulou
Durham University
V. Guglielmo
University of Padua
Laboratoire d'Astrophysique de Marseille
Istituto nazionale di astrofisica (INAF)
T. Sadibekova
Institut de Recherche sur les Lois Fondamentales de l'Univers
A. Iovino
Istituto nazionale di astrofisica (INAF)
B. Maughan
University of Bristol
L. Chiappetti
Istituto nazionale di astrofisica (INAF)
S. Alis
Istanbul University
B. Altiéri
European Space Astronomy Centre (ESAC)
I. Baldry
Liverpool John Moores University
D. Bottini
Istituto nazionale di astrofisica (INAF)
M. Birkinshaw
University of Bristol
M. Bremer
University of Bristol
M. Brown
Monash University
O. Cucciati
Istituto nazionale di astrofisica (INAF)
University of Bologna
S. Driver
ICRAR
University of St Andrews
E. Elmer
University of Nottingham
S. Ettori
National Institute for Nuclear Physics
Istituto nazionale di astrofisica (INAF)
A. E. Evrard
University of Michigan
L. Faccioli
Institut de Recherche sur les Lois Fondamentales de l'Univers
B. Granett
University of Milan
Istituto nazionale di astrofisica (INAF)
M. Grootes
Max Planck Society
L. Guzzo
Istituto nazionale di astrofisica (INAF)
University of Milan
A. Hopkins
Australian Astronomical Observatory
Cathy Horellou
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
J. P. Lefèvre
Institut de Recherche sur les Lois Fondamentales de l'Univers
J. Liske
University of Hamburg
K. Malek
Narodowe Centrum Badan Jadrowych
F. Marulli
Istituto nazionale di astrofisica (INAF)
University of Bologna
National Institute for Nuclear Physics
S. Maurogordato
Université Nice Sophia Antipolis (UNS)
M. Owers
Australian Astronomical Observatory
Macquarie University
S. Paltani
University of Geneva
B. M. Poggianti
Istituto nazionale di astrofisica (INAF)
M. Polletta
Istituto nazionale di astrofisica (INAF)
Aix Marseille University
University of Toulouse
M. Plionis
Aristotle University of Thessaloniki
National Observatory of Athens
A. Pollo
Narodowe Centrum Badan Jadrowych
Jagiellonian University in Kraków
E. Pompei
European Southern Observatory Santiago
T. J. Ponman
University of Birmingham
D. Rapetti
NASA Ames Research Center
University of Colorado at Boulder
M. Ricci
Université Nice Sophia Antipolis (UNS)
A. Robotham
ICRAR
University of St Andrews
R. Tuffs
Max Planck Society
L. Tasca
Laboratoire d'Astrophysique de Marseille
I. Valtchanov
European Space Astronomy Centre (ESAC)
D. Vergani
Istituto nazionale di astrofisica (INAF)
G. Wagner
Merton College
University of Oxford
J. Willis
University of Victoria
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 620 A5Subject Categories
Analytical Chemistry
Astronomy, Astrophysics and Cosmology
Bioinformatics and Systems Biology
DOI
10.1051/0004-6361/201731606