Τίτλος:
The X-CLASS survey: A catalogue of 1646 X-ray-selected galaxy clusters
up to similar to 1.5
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Context. Cosmological probes based on galaxy clusters rely on cluster
number counts and large-scale structure information. X-ray cluster
surveys are well suited for this purpose because they are far less
affected by projection effects than optical surveys, and cluster
properties can be predicted with good accuracy.Aims. The XMM Cluster
Archive Super Survey, X-CLASS, is a serendipitous search of
X-ray-detected galaxy clusters in 4176 XMM-Newton archival observations
until August 2015. All observations are clipped to exposure times of 10
and 20 ks to obtain uniformity, and they span similar to 269 deg(2)
across the high-Galactic latitude sky (|b| > 20 degrees). The main goal
of the survey is the compilation of a well-selected cluster sample
suitable for cosmological analyses.Methods. We describe the detection
algorithm, the visual inspection, the verification process, and the
redshift validation of the cluster sample, as well as the cluster
selection function computed by simulations. We also present the various
metadata that are released with the catalogue, along with two different
count-rate measurements, an automatic one provided by the pipeline, and
a more detailed and accurate interactive measurement. Furthermore, we
provide the redshifts of 124 clusters obtained with a dedicated
multi-object spectroscopic follow-up programme.Results. With this
publication, we release the new X-CLASS catalogue of 1646 well-selected
X-ray-detected clusters over a wide sky area, along with their selection
function. The sample spans a wide redshift range, from the local
Universe up to z similar to 1.5, with 982 spectroscopically confirmed
clusters, and over 70 clusters above z=0.8. The redshift distribution
peaks at z similar to 0.1, while if we remove the pointed observations
it peaks at z similar to 0.3. Because of its homogeneous selection and
thorough verification, the cluster sample can be used for cosmological
analyses, but also as a test-bed for the upcoming eROSITA observations
and other current and future large-area cluster surveys. It is the first
time that such a catalogue is made available to the community via an
interactive database which gives access to a wealth of supplementary
information, images, and data.
Συγγραφείς:
Koulouridis, E.
Clerc, N.
Sadibekova, T.
Chira, M. and
Drigga, E.
Faccioli, L.
Le Fevre, J. P.
Garrel, C. and
Gaynullina, E.
Gkini, A.
Kosiba, M.
Pacaud, F.
Pierre,
M.
Ridl, J.
Tazhenova, K.
Adami, C.
Altieri, B. and
Baguley, J. -C.
Cabanac, R.
Cucchetti, E.
Khalikova, A. and
Lieu, M.
Melin, J. -B.
Molham, M.
Ramos-Ceja, M. E. and
Soucail, G.
Takey, A.
Valtchanov, I.
Περιοδικό:
Chinese Astronomy and Astrophysics
Εκδότης:
EDP SCIENCES S A
Λέξεις-κλειδιά:
X-rays: galaxies: clusters; galaxies: clusters: general; surveys;
catalogs; large-scale structure of Universe; galaxies: clusters:
intracluster medium
DOI:
10.1051/0004-6361/202140566
