J/ApJS/216/28 SWXCS III. Cluster catalog from 2005-2012 Swift data (Liu+, 2015)
The Swift X-ray telescope Cluster Survey.
III. Cluster catalog from 2005-2012 archival data.
Liu T., Tozzi P., Tundo E., Moretti A., Rosati P., Wang J.-X.,
Tagliaferri G., Campana S., Giavalisco M.
<Astrophys. J. Suppl. Ser., 216, 28 (2015)>
=2015ApJS..216...28L 2015ApJS..216...28L
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Cross identifications ;
Redshifts ; Surveys
Keywords: catalogs; cosmology: observations; galaxies: clusters: general;
surveys; X-rays: galaxies: clusters
Abstract:
We present the Swift X-ray Cluster Survey (SWXCS) catalog obtained
using archival data from the X-ray telescope (XRT) on board the Swift
satellite acquired from 2005 February to 2012 November, extending the
first release of the SWXCS. The catalog provides positions, soft
fluxes, and, when possible, optical counterparts for a flux-limited
sample of X-ray group and cluster candidates. We consider the fields
with Galactic latitude |b|>20° to avoid high H I column densities.
We discard all of the observations targeted at groups or clusters of
galaxies, as well as particular extragalactic fields not suitable to
search for faint extended sources. We finally select ∼3000 useful
fields covering a total solid angle of ∼400deg2. We identify
extended source candidates in the soft-band (0.5-2keV) images of these
fields using the software EXSdetect, which is specifically calibrated
for the XRT data. Extensive simulations are used to evaluate
contamination and completeness as a function of the source signal,
allowing us to minimize the number of spurious detections and to
robustly assess the selection function. Our catalog includes 263
candidate galaxy clusters and groups down to a flux limit of
7x10-15erg/cm2/s in the soft band, and the logN-logS is in very good
agreement with previous deep X-ray surveys. The final list of sources
is cross-correlated with published optical, X-ray, and
Sunyaev-Zeldovich catalogs of clusters. We find that 137 sources have
been previously identified as clusters in the literature in
independent surveys, while 126 are new detections. Currently, we have
collected redshift information for 158 sources (60% of the entire
sample).
Description:
From the entire Swift XRT archive in the period 2005 February-2012
November, we select all the fields that can be used to build an
unbiased, serendipitous X-ray cluster catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 91 263 Swift X-ray Cluster Survey (SWXCS) catalog
table3.dat 139 383 Catalog cross-correlation results for 163 clusters
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
VII/175 : Edinburgh-Durham Southern Galaxy Cat. - Cluster Cat. (Lumsden+ 1992)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
II/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994)
J/ApJS/216/27 : Galaxy clusters in the SPT-SZ survey (Bleem+, 2015)
J/A+A/567/A89 : Swift X-ray Telescope Cluster Survey. II. (Tozzi+, 2014)
J/ApJ/771/137 : WMAP observations of Planck ESZ clusters (Ma+, 2013)
J/A+A/555/A30 : REFLEX II. Properties of the survey (Boehringer+ 2013)
J/A+A/547/A57 : Swift X-ray Telescope Cluster Survey (Tundo+, 2012)
J/MNRAS/423/1024 : XCS-DR1 Cluster Catalogue (Mehrtens+, 2012)
J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
J/A+A/534/A109 : MCXC Meta-Catalog X-ray galaxy Clusters (Piffaretti+, 2011)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
J/ApJ/736/21 : Galaxy clusters opt. cat. from AMF on SDSS DR6 (Szabo+ 2011)
J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)
J/AJ/137/2981 : Northern Optical Cluster Survey. III. (Gal+, 2009)
J/ApJS/174/117 : Properties and metal abundances of clusters (Maughan+, 2008)
J/ApJS/173/185 : GALEX UV atlas of nearby galaxies (Gil de Paz+, 2007)
J/ApJS/172/561 : The 400d cluster Survey (Burenin+, 2007)
J/MNRAS/379/867 : BCG C4 cluster catalog (Von Der Linden+, 2007)
J/ApJ/660/239 : MaxBCG cat. of galaxy clusters from SDSS (Koester+, 2007)
J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)
J/ApJ/645/955 : ChaMP serendipitous galaxy cluster survey (Barkhouse+, 2006)
J/AJ/130/968 : SDSS-C4 cluster catalog (Miller+, 2005)
J/A+A/425/367 : REFLEX Galaxy Cluster Survey catalogue (Boehringer+, 2004)
J/ApJ/607/L33 : First IBIS Catalog: 20-100keV (Bird+, 2004)
J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003)
J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)
http://swxcs.ustc.edu.cn/ : SWXCS home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [SWXCS]
7- 20 A14 --- SWXCS IAU registry identifier (1)
21- 21 A1 --- f_SWXCS [*] Source in first release (G1)
23- 32 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
34- 43 F10.6 deg DEdeg Declination in decimal degrees (J2000)
45- 51 I7 s Exp Effective exposure time
53- 57 F5.2 10+20/cm2 NH [0.5/12] Galactic H I column density
59- 63 F5.1 arcsec Reff [27/485] Effective radius (2)
65- 69 I5 ct Nnet [80/40091] Net 0.5-2keV band source counts
71- 73 I3 ct e_Nnet The 1σ uncertainty in Nnet
75- 79 F5.1 --- SNR [5/157] Signal-to-Noise in 0.5-2 keV band
81- 86 F6.1 10-17W/m2 Flux [0.6/1064] The 0.5-2keV band flux;
in 10-14erg/cm2/s unit
88- 91 F4.1 10-17W/m2 e_Flux The 1σ uncertainty in Flux
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Note (1): Sources included in the first release keep the name used in Paper II
(J/A+A/567/A89) despite the new centroid positions.
Note (2): The area of the source region is πReff2.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [SWXCS]
7- 20 A14 --- SWXCS IAU registry identifier
21 A1 --- f_SWXCS [*] Source in first release (G1)
23- 31 F9.7 --- zopt [0.01/1]? Optical redshift of cluster or galaxy
counterpart
33 A1 --- f_zopt [p] p = photometric redshift
35- 38 F4.2 --- zTNG [0.2/0.9]? Telescopio Nazionale Galileo (TNG)
measured redshift from Paper II (J/A+A/567/A89)
40- 43 F4.2 --- e_zTNG [0/0.1]? Lower uncertainty limit in zTNG
45- 48 F4.2 --- E_zTNG [0/0.1]? Upper uncertainty limit in zTNG
50- 54 F5.3 --- zX [0.06/1]? X-ray redshift from
Paper II (J/A+A/567/A89)
56- 60 F5.3 --- e_zX [0/0.1]? Lower uncertainty limit in zX
62- 66 F5.3 --- E_zX [0/0.1]? Upper uncertainty limit in zX
68- 76 A9 --- r_Cl Catalog where cluster counter is from (1)
78-103 A26 --- Cl Cluster counterpart identifier
105-134 A30 --- Gal Galaxy counterpart identifier within 7"
found in NED
136-139 F4.2 arcmin Sep [0.01/4.7]?=0 Match separation
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Note (1): Catalogs are:
WHL = SDSS WHL catalog (Wen et al. 2012, J/ApJS/199/34;
<[WHL2012] JHHMMSS.s+DDMMSS> in Simbad)
AMF = SDSS AMF catalog (Szabo et al. 2011, J/ApJ/736/21;
<[SPD2011] NNNNN> in Simbad)
MaxBCG = SDSS MaxBCG catalog (Koester et al. 2007, J/ApJ/660/239;
<[KMA2007] DDD.ddddd+DD.ddddd> in Simbad)
GMBCG = SDSS GMBCG catalog (Hao et al. 2010, J/ApJS/191/254;
in Simbad)
SDSSC4 = SDSSC4 catalog (Miller et al. 2005, J/AJ/130/968,
<SDSS-C4 NNNN> in Simbad; von der Linden et al. 2007,
J/MNRAS/379/867, <SDSS-C4-DR3 NNNN> in Simbad)
Abell = Abell catalog (Abell et al. 1989, VII/110; in Simbad)
NSCS1 = NSCS1 catalog (Gal et al. 2003, J/AJ/125/2064;
in Simbad)
NSCS2 = NSCS2 catalog (Gal et al. 2003, J/AJ/125/2064;
in Simbad)
EDCC = EDC catalog (Lumsden et al. 1992, VII/175; in Simbad)
Berlind06 = SDSS galaxy groups and clusters catalog built by Berlind
et al. (2006, J/ApJS/167/1; <[BFW2006] MrNN NNNNN> in Simbad)
400d = ROSAT 400d catalog (Burenin et al. 2007, J/ApJS/172/561;
<[BVH2007] NNN> in Simbad)
NORAS = Northern ROSAT All-Sky catalog (Bohringer et al. 2000,
J/ApJS/129/435; in Simbad)
REFLEX = ROSAT-ESO flux Limited X-ray galaxy cluster catalog
(Bohringer et al. 2004, J/A+A/425/367)
XCS = XMM-Newton Cluster Survey catalog (Mehrtens et al. 2012,
J/MNRAS/423/1024; in Simbad)
ChaMP = Chandra Multiwavelength Project galaxy cluster catalog
(Barkhouse et al. 2006, J/ApJ/645/955; <[BGV2006] NNN> in Simbad)
MCXC = MCXC catalog (Piffaretti et al. 2011, J/A+A/534/A109;
in Simbad)
Planck = Planck Collaboration et al. 2014A&A...571A..29P 2014A&A...571A..29P
SPT = South Pole Telescope (SPT; Bleem et al. 2015, J/ApJS/216/27;
<SPT-CL JHHMM+DDMM> in Simbad)
NED = NASA/IPAC Extragalactic Database (http://ned.ipac.caltech.edu/)
= 16 cluster counterparts detected via the SZ effect
See section 5.
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Global notes:
Note (G1):
* = source included in the first release of SWXCS (Paper I, J/A+A/547/57;
Paper II, J/A+A/567/A89).
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History:
From electronic version of the journal
References:
Tundo et al. Paper I. 2012A&A...547A..57T 2012A&A...547A..57T Cat. J/A+A/547/57
Tozzi et al. Paper II. 2014A&A...567A..89T 2014A&A...567A..89T Cat. J/A+A/567/A89
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 05-Mar-2015