J/A+A/594/A32 3XMM/SDSS Stripe 82 Galaxy Cluster Survey. I. (Takey+, 2016)
The 3XMM/SDSS Stripe 82 Galaxy Cluster Survey:
I. Cluster catalogue and discovery of two merging cluster candidates.
Takey A., Durret F., Mahmoud E., Ali G.
<Astron. Astrophys. 594, A32 (2016)>
=2016A&A...594A..32T 2016A&A...594A..32T (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; X-ray sources
Keywords: X-rays: galaxies: clusters - galaxies: clusters: general - surveys -
catalogs
Abstract:
We present a galaxy cluster survey based on XMM-Newton observations
that are located in Stripe 82 of the Sloan Digital Sky Survey (SDSS).
The survey covers an area of 11.25deg2. The X-ray cluster
candidates were selected as serendipitously extended detected sources
from the third XMM-Newton serendipitous source catalogue (3XMM-DR5). A
cross-correlation of the candidate list that comprises 94 objects with
recently published X-ray and optically selected cluster catalogues
provided optical confirmations and redshift estimates for about half
of the candidate sample. We present a catalogue of X-ray cluster
candidates previously known in X-ray and/or optical bands from the
matched catalogues or NED. The catalogue consists of 54 systems with
redshift measurements in the range of 0.05-1.19 with a median of 0.36.
Of these, 45 clusters have spectroscopic confirmations as stated in
the matched catalogues. We spectroscopically confirmed another 6
clusters from the available spectroscopic redshifts in the SDSS-DR12.
The cluster catalogue includes 17 newly X-ray discovered clusters,
while the remainder were detected in previous XMM-Newton and/or ROSAT
cluster surveys. Based on the available redshifts and fluxes given in
the 3XMM-DR5 catalogue, we estimated the X-ray luminosities and masses
for the cluster sample. We also present the list of the remaining
X-ray cluster candidates (40 objects) that have no redshift
information yet in the literature. Of these candidates, 25 sources are
considered as distant cluster candidates beyond a redshift of 0.6. We
also searched for galaxy cluster mergers in our cluster sample and
found two strong candidates for newly discovered cluster mergers at
redshifts of 0.11 and 0.26. The X-ray and optical properties of these
systems are presented.
Description:
The 3XMM/SDSS Stripe 82 cluster survey is mainly based on the XMM
X-ray serendipitous source catalogue. The latest version of the
catalogue, 3XMM-DR5, was released on 2015 April 28. The 3XMM-DR5
catalogue contains 565962 X-ray detections comprising 396910 X-ray
sources, which were detected in 7781 EPIC (PN, MOS1, MOS2)
observations made public on/or before 2013 December 31. These
observations cover 877deg2 of the sky (Rosen et al.
2016A&A...590A...1R 2016A&A...590A...1R, Cat. IX/46).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 214 54 Galaxy cluster catalogue
tablec1.fits 2880 8 Fits version of tablec1
tablec2.dat 85 40 Cluster candidate catalogue
tablec2.fits 2880 4 Fits version of tablec2
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See also:
IX/46 : XMM-Newton Serendipitous Source Cat. 3XMM-DR5 (XMM-SSC, 2016)
J/A+A/534/A120 : The 2XMMi/SDSS Galaxy Cluster Survey (Takey+, 2011)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 15 I15 --- DETID X-ray detection number in the 3XMM-DR5 (G1)
17- 20 A4 --- --- [3XMM]
22- 37 A16 --- 3XMM IAU name given in the 3XMM-DR5 catalog (G1)
39- 47 F9.5 deg RAdeg X-ray detection right ascension (J2000) (G1)
49- 56 F8.5 deg DEdeg X-ray detection declination (J2000) (G1)
58- 66 I9 --- OBSID XMM-Newton observation number (G1)
68- 73 F6.4 --- z Galaxy cluster redshift from col. ztype
75- 78 F4.2 kpc/arcsec Scale Scale at the cluster redshift
80- 84 F5.2 10-17W/m2 FX X-ray flux in [0.5-2.0]keV band (G1)
86- 89 F4.2 10-17W/m2 e_FX Error in Fcat (G1)
91- 96 F6.2 10+35W LX X-ray luminosity in [0.5-2.0]keV band
98-102 F5.2 10+35W e_LX Error in Lcat
104-109 F6.2 kpc R500 Estimated physical radius R500
111-115 F5.2 kpc e_R500 Error in R500
117-122 F6.2 10+35W L500 X-ray bolometric luminosity within R500
124-128 F5.2 10+35W e_L500 Error in L500
130-134 F5.2 10+13Msun M500 Cluster mass within R500
136-139 F4.2 10+13Msun e_M500 Error in M500
141 I1 --- Ndet Number of detections for same source (G1)
143-157 A15 --- X-rayCat Name of X-ray selected cluster catalog (2)
159-178 A20 --- OptCat Name of optically selected cluster
catalog (2)
180-183 A4 --- ztype [spec phot] Redshift type of the cluster
(spec: spectroscopic, phot: photometric)
185-204 A20 --- r_z Reference to the chosen redshift (2)
206-211 F6.4 --- zs ?=9.9999 Mean redshift for cluster galaxies
within R200 with spectroscopic redshift
from the SDSS-DR12
213-214 I2 --- o_zs ?=99 Number of cluster galaxies that are
used to derive zs
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Note (2): No value for the newly discovered X-ray clusters based on
XMM-Newton data
References for catalogs as follows:
2XMMi/SDSS : Takey et al., 2013A&A...558A..75T 2013A&A...558A..75T, Cat J/A+A/558/A75
and 2014A&A...564A..54T 2014A&A...564A..54T, Cat J/A+A/564/A54
XCS : Mehrtens et al., 2012MNRAS.423.1024M 2012MNRAS.423.1024M, Cat J/MNRAS/423/1024
XCLASS : Clerc et al., 2012MNRAS.423.3561C 2012MNRAS.423.3561C, Cat J/MNRAS/423/3561
WH15 : Wen et al., 2015ApJ...807..178W 2015ApJ...807..178W, Cat J/ApJ/807/178
redMaPPer : Rykoff et al., 2014ApJ...785..104R 2014ApJ...785..104R,
http://risa.stanford.edu/redmapper/
Geach : Geach et al., 2011MNRAS.413.3059G 2011MNRAS.413.3059G, Cat J/MNRAS/413/3059
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Byte-by-byte Description of file: tablec2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 I15 --- DETID X-ray detection number in the 3XMM-DR5 (G1)
17- 20 A4 --- --- [3XMM]
22- 37 A16 --- 3XMM IAU name given in the 3XMM-DR5 catalog (G1)
39- 47 F9.5 deg RAdeg X-ray detection right ascension (J2000) (G1)
49- 56 F8.5 deg DEdeg X-ray detection declination (J2000) (G1)
58- 66 I9 --- OBSID XMM-Newton observation number (G1)
68- 71 F4.2 10-17W/m2 FX X-ray flux in [0.5-2.0]keV band (G1)
73- 76 F4.2 10-17W/m2 e_FX Error in Fcat (G1)
78 I1 --- Ndet Number of detections for same source (G1)
80 I1 --- Class [1/2] A flag of X-ray detection (2)
82- 85 A4 --- redshift? Expected redshift of the cluster candidate
(low redshift: z<0.6, high redshift: z>0.6)
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Note (2): X-ray detection flag as follows:
1 = good cluster candidate
2 =weak candidate
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Global notes:
Note (G1): Parameters extracted from the 3XMM-DR5 catalogue (Cat. IX/46).
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Acknowledgements:
Ali Takey, takey(at)iap.fr
(End) Patricia Vannier [CDS] 22-Jun-2016