J/MNRAS/503/5763 SPIDERS galaxy clusters catalogue (Kirkpatrick+, 2021)
SPIDERS: an overview of the largest catalogue of spectroscopically confirmed
x-ray galaxy clusters.
Kirkpatrick C.C., Clerc N., Finoguenov A., Damsted S., Ider Chitham J.,
Kukkola A.E., Gueguen A., Furnell K., Rykoff E., Comparat J., Saro A.,
Capasso R., Padilla N., Erfanianfar G., Mamon G.A., Collins C., Merloni A.,
Brownstein J.R., Schneider D.P.
<Mon. Not. R. Astron. Soc., 503, 5763-5777 (2021)>
=2021MNRAS.503.5763K 2021MNRAS.503.5763K (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ; Velocity dispersion
Keywords: catalogues - galaxies: clusters: general - cosmology: observations
Abstract:
SPIDERS is the spectroscopic follow-up effort of the Sloan Digital Sky
Survey IV (SDSS-IV) project for the identification of X-ray selected
galaxy clusters. We present our catalogue of 2740 visually inspected
galaxy clusters as part of the SDSS Data Release 16 (DR16). Here we
detail the target selection, our methods for validation of the
candidate clusters, performance of the survey, the construction of the
final sample, and a full description of what is found in the
catalogue. Of the sample, the median number of members per cluster is
approximately 10, with 818 having 15 or greater. We find that we are
capable of validating over 99 per cent of clusters when five redshifts
are obtained below z<0.3 and when nine redshifts are obtained above
z>0.3. We discuss the improvements in this catalogue's identification
of cluster using 33340 redshifts, with {DELTA}zphot/{DELTA}zspec∼100,
over other photometric and spectroscopic surveys, as well as
presenting an update to previous (σ-LX) and (σ-λ)
relations. Finally, we present our cosmological constraints derived
using the velocity dispersion function.
Description:
X-ray and optical positions of 2740 X-ray selected galaxy clusters
confirmed with dedicated SDSS spectroscopic data, fully released in
SDSS Data Release DR16. Redshift and their uncertainties provided for
each identified object, as well as an estimate of the velocity
dispersion and the number of members in the red-sequence identified
after collaborative visual inspection. The file lists X-ray derived
physical properties such as luminosity and flux in standard X-ray
energy bands, assuming flat ΛCDM model with Ωm=0.3 and
H0=70km/s/Mpc. Basic cross-identification with the MCXC catalogue
(Piffaretti et al., 2011A&A...534A.109P 2011A&A...534A.109P, Cat. J/A+A/534/A109)
is also provided.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 434 2740 The SPIDERS galaxy cluster catalogue
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See also:
J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters (Piffaretti+ 2011)
J/MNRAS/478/4952 : SPIDERS BCGs gri photometry (Furnell+, 2018)
J/A+A/638/A114 : CODEX galaxy clusters catalog (Finoguenov+, 2020)
https://www.sdss4.org/dr16/data_access/value-added-catalogs/ : SDSS DR16
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster The SPIDERS/CODEX identification number,
N_NNNNN (CLUS_ID)
9- 10 I2 --- Ncomp ?=-1 Number of components identified by
visual inspection (-1 indicates this is
likely a merger system) (NCOMPONENT)
12- 17 I6 --- CODEX CODEX cluster candidate unique
identifier (CODEX)
19- 31 F13.9 deg RAdeg CODEX X-ray detection right ascension
(J2000) (RA)
33- 46 F14.10 deg DEdeg CODEX X-ray detection declination
(J2000) (DEC)
48- 68 F21.17 deg RAOdeg CODEX optical detection right ascension
(J2000) (RA_OPT)
70- 92 F23.19 deg DEOdeg CODEX optical detection declination
(J2000) (DEC_OPT)
94-112 F19.15 --- lambdaOpt Richness (λOPT) of the CODEX
optical detection (LAMBDACHISQOPT)
114-133 F20.18 --- zlambda Photometric redshift (z_λ) of the
CODEX optical detection (Z_LAMBDA)
135-155 F21.19 --- e_zlambda Uncertainty on zLambda (ZLAMBDAERR)
157-159 I3 --- Nmemb Number of objects in the red sequence
(with pmem>0.05) (NMEM)
161-162 I2 --- NOKz Number of red-sequence members with a
spectroscopic redshift (NOKZ)
164-183 F20.18 --- zScreen Galaxy cluster redshift
(SCREEN_CLUZSPEC)
185-194 E10.5 --- e_zScreen Bootstrap uncertainty on zScreen
(SCREENCLUZSPECERR)
196-217 E22.17 --- s_zScreen Dispersion (Standard deviation) in the
inspection cluster redshifts
(SCREENCLUZSPECSPREAD)
219-238 F20.15 km/s sigmaScreen Gapper estimate of the cluster velocity
dispersion (SCREENCLUVDISPGAP)
240-260 F21.16 km/s BWTsigmaScreen Square root of the biweight variance
velocity dispersion
(SCREENCLUVDISPBWT)
262-281 F20.15 km/s BestsigmaScreen Best velocity dispersion
(SCREENCLUVDISPBEST)
283-301 F19.16 --- NmembScreen Inspection-weighted number of
red-sequence members identified as
cluster spectroscopic members
(SCREENNMEMBERSW)
303-311 A9 --- Status [validated] Validation status of the
cluster assigned by the visual
inspector (STATUS)
313 I1 --- Ninsp Number of individual inspections for
this system (NINSPECTORS)
315 I1 --- Nvalid Number of inspectors validating this
system as a galaxy cluster (NVALID)
317-326 E10.5 10-7W LX0124 Luminosity in the 0.1-2.4keV band of
the cluster, aperture R_500c (LX0124)
328-337 E10.5 10-7W e_LX0124 Uncertainty on LX0124 (ELX)
339-344 F6.4 deg R200c Apparent R200c radius of the galaxy
cluster (R200C_DEG)
346-355 E10.5 mW/m2 FX0520 X-ray flux in the 0.5-2.0keV band
(FLUX052)
357-366 E10.5 mW/m2 e_FX0520 Uncertainty on FX0520 (EFLUX052)
368-379 A12 --- MCXC Identifier in the MCXC catalogue,
Piffaretti et al., 2011, J/A+A/534/A109
(MCXC)
381-434 A54 --- AName Alternative name in MCXC catalog (ANAME)
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History:
From Nicolad Clerc, nicolas.clerc(at)irap.omp.eu
Acknowledgements:
Funding for the Sloan Digital Sky Survey IV has been provided by the
Alfred P. Sloan Foundation, the US Department of Energy Office of
Science, and the Participating Institutions. SDSS-IV acknowledges
support and resources from the Center for High-Performance Computing
at the University of Utah. The SDSS web site is www.sdss.org.
References:
Clerc et al., 2016MNRAS.463.4490C 2016MNRAS.463.4490C
Finoguenov et al., 2020A&A...638A.114F 2020A&A...638A.114F, Cat. J/A+A/638/A114
Clerc et al., 2020MNRAS.497.3976C 2020MNRAS.497.3976C
Piffaretti et al., 2011A&A...534A.109P 2011A&A...534A.109P, Cat. J/A+A/534/A109
(End) Patricia Vannier [CDS] 16-Jul-2024