J/A+A/638/A114 CODEX galaxy clusters catalog (Finoguenov+, 2020)
CODEX clusters. Survey, catalog, and cosmology of the X-ray luminosity function.
Finoguenov A., Rykoff E., Clerc N., Costanzi M., Hagstotz S.,
Ider Chitham J., Kiiveri K., Kirkpatrick C.C., Capasso R., Comparat J.,
Damsted S., Dupke R., Erfanianfar G., Henry J.P., Kaefer F.,
Kneib J-P., Lindholm V., Rozo E., van Waerbeke L., Weller J.
<Astron. Astrophys. 638, A114 (2020)>
=2020A&A...638A.114F 2020A&A...638A.114F (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Clusters, galaxy ; X-ray sources
Keywords: surveys - catalogs - large-scale structure of Universe
Abstract:
Large area catalogs of galaxy clusters constructed from ROSAT All Sky
Survey provide the base for our knowledge on the population of
clusters thanks to the long-term multiwavelength efforts to follow-up
observations of these clusters..
Advent of large area photometric surveys superseding in depth previous
all-sky data allows us to revisit the construction of X-ray cluster
catalogs, extending the study to lower cluster masses and to higher
redshifts and to provide the modelling of the selection function.
We perform a wavelet detection of X-ray sources and make extensive
simulations of the detection of clusters in the RASS data. We assign
an optical richness to each of the 24,788 detected X-ray sources in
the 10,382 square degrees of SDSS BOSS area, using redMaPPer version
5.2 run on Sloan Digital Sky Survey photometry. We name this survey
COnstrain Dark Energy with X-ray (CODEX) clusters.
We show that there is no obvious separation of sources on galaxy
clusters and AGN, based on distribution of systems on their richness.
This is a combination of increasing number of galaxy groups and their
selection as identification of an X-ray sources either by chance or
due to groups hosting an AGN. To clean the sample, we use a cut on the
optical richness at the level corresponding to the 10% completeness
of the survey and include it into the modelling of cluster selection
function. We present the X-ray catalog extending to a redshift of 0.6.
CODEX is the first large area X-ray selected catalog of Northern
clusters reaching the fluxes of 10-13ergs/s/cm2. We provide the
modelling of the sample selection and discuss the redshift evolution
of the high end of the X-ray luminosity function (XLF). Our results on
z<0.3 XLF are in agreement with previous studies, while we provide new
constraints on the 0.3<z<0.6 XLF. We find a lack of strong redshift
evolution of the XLF, provide exact modeling of the effect of low
number statistics and AGN contamination and present the resulting
constraints on the flat {LAMBDA}CDM.
Description:
We present a new large catalog of X-ray clusters detected in the
SDSS area. The catalog is constructed with the aim of efficient
spectroscopic follow-up program of SDSS, which has completed data
acquisition process in March 2019 and this paper describes the cata
The CODEX cluster catalog (Tab.1 of the paper)
(1) CODEX source ID, (2) frequently used SPIDERS ID, (3-4) coordinates
of the X-ray center, (5) redMaPPer redshift, (6-7) redMaPPer v5.2 SDSS
richness estimate and its 1 sigma error, (8-9) coordinates of the best
optical center, (10) probability of the optical center to be correct.
(11-12) X-ray luminosity in the rest-frame 0.1-2.4keV and 1 sigma
error, (13) temperature in keV used in estimating the K-correction,
(14-16) Aperture, K, and PSF corrections, (17) correction used in the
computation of the optical richness, (18-19) the aperture-corrected
flux of the source in the 0.5-2keV band and its 1 sigma error, (20)
flag (0 - clean catalog using Eq.1 of the paper, 1 - full catalog).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 201 10382 CODEX cluster catalog (table 1)
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See also:
J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- CODEX CODEX identification number
8- 14 A7 --- SPIDERS Frequently used SPIDERS ID
16- 24 F9.5 deg RAdeg X-ray centrer right ascension (J2000)
26- 34 F9.5 deg DEdeg X-ray centrer declination (J2000)
36- 40 F5.3 --- z redMaPPer redshift
42- 52 F11.7 --- lambda redMaPPer v5.2 SDSS richness estimate
54- 65 F12.8 --- e_lambda redMaPPer v5.2 SDSS richness estimate
1 sigma error
67- 87 F21.17 deg RAOdeg Best optical center right ascension (J2000)
89-111 F23.19 deg DEOdeg Best optical center declination (J2000)
113-122 F10.8 --- Pcenter Probability of the optical center to be correct
124-132 E9.4 10-7W LX0124 X-ray luminosity in the rest-frame 0.1-2.4keV
134-142 E9.4 10-7W e_LX0124 X-ray luminosity in the rest-frame 0.1-2.4keV
1 sigma error
144-148 F5.2 keV kT temperature used in estimating the K-correction
150-154 F5.2 --- Acor Aperture correction
156-159 F4.2 --- Kcor K correction
161-165 F5.3 --- PSFcor PSF correction
167-177 F11.8 --- SCALEVAL correction used in the computation of the
optical richness
179-188 E10.4 mW/m2 FX0520 Aperture-corrected flux of the source in
the 0.5-2keV band
190-199 E10.4 mW/m2 e_FX0520 Aperture-corrected flux of the source in
the 0.5-2keV band 1 sigma error
201 A1 --- clean [0/1] Flag (1)
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Note (1): Flag as follows:
0 = clean catalog using Eq.1 of the paper
1 = full catalog
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Acknowledgements:
Alexis Finoguenov, alexis.finoguenov(at)helsinki.fi
(End) Patricia Vannier [CDS] 27-Apr-2020