J/ApJS/176/374 WARPS-II Cluster catalog. VII. (Horner+, 2008)
The WARPS survey. VII. The WARPS-II cluster catalog.
Horner D.J., Perlman E.S., Ebeling H., Jones L.R., Scharf C.A., Wegner G.,
Malkan M., Maughan B.
<Astrophys. J. Suppl. Ser., 176, 374-413 (2008)>
=2008ApJS..176..374H 2008ApJS..176..374H
ADC_Keywords: Clusters, galaxy ; Surveys ; X-ray sources ; Redshifts
Cross identifications
Keywords: catalogs - galaxies: clusters: general - surveys
X-rays: galaxies: clusters - X-rays: general
Abstract:
We present the galaxy cluster catalog from the second, larger phase of
the Wide Angle ROSAT Pointed Survey (WARPS), an X-ray selected survey
for high-redshift galaxy clusters. WARPS is among the largest deep
X-ray cluster surveys and is being used to study the properties and
evolution of galaxy clusters. The WARPS-II sample contains 125
clusters serendipitously detected in a survey of 301 ROSAT PSPC
pointed observations and covers a sky area of 56.7deg2. Of these 125
clusters, 53 have not been previously reported in the literature. We
have nearly complete spectroscopic follow-up of the clusters, which
range in redshift from z=0.029 to z=0.92 with a median redshift of
z=0.29 and find 59 clusters with z≥0.3 (29 not previously reported
in the literature) and 11 clusters with z≥0.6 (6 not previously
reported). We also define a statistically complete subsample of 102
clusters above a uniform flux limit of 6.5x10-14ergs/cm2/s
(0.5-2.0keV). Here we provide the cluster catalog and finder charts
consisting of X-ray overlays on optical CCD images. We also compare
our redshifts, fluxes, and detection methods to other similar
published cluster surveys and find no serious issues with our
measurements or completeness.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 104 102 WARPS-II statistically complete, flux-limited sample
table3.dat 103 23 WARPS-II additional clusters and candidates
table4.dat 110 72 Alternate names for WARPS-II clusters
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See also:
J/MNRAS/301/881 : The ROSAT brightest cluster sample - I. (Ebeling+, 1998)
J/ApJ/504/27 : The LX-T Relation for Nearby Clusters (Markevitch, 1998)
J/MNRAS/292/419 : Cooling flows in 207 clusters of galaxies (White+, 1997)
J/ApJS/140/265 : WARPS survey. VI. (Perlman+, 2002)
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [WARP]
6- 18 A13 --- WARPS Assigned cluster name (JHHMM.m+DDMMW) (G1)
20- 27 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
29- 36 F8.4 deg DEdeg Declination in decimal degrees (J2000)
38- 41 F4.2 10+20/cm2 nH Hydrogen column density from Dickey &
Lockman, 1990ARA&A..28..215D 1990ARA&A..28..215D
43- 48 F6.2 10-17W/m2 Flux Unabsorbed source flux in the 0.5-2.0keV
band, in 10-14erg/cm2/s (1)
50- 54 F5.2 [10-7W] logLX Log of the rest-frame source luminosity in
the 0.5-2.0keV band derived as the flux (2)
56- 60 F5.2 [10-7W] logLX2 Luminosity calculated using a H0=70,
ΩM=0.3, ΩΛ=0.7
cosmology.
62- 67 F6.4 --- z Redshift of the cluster
69- 70 I2 --- o_z ? Number of galaxy redshifts used
to derive the cluster redshift
71- 72 A2 --- u_z [.5? ] Uncertain number of valid redshifts
74- 78 F5.1 arcsec Rad ?=- Estimated core radius of the cluster
80-104 A25 --- Com Comments (See section 3.2 for more details)
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Note (1): We calculated the final flux from the total count rate using the
same iterative method as Ebeling et al. (1998, Cat. J/MNRAS/301/881).
We assume a Raymond-Smith spectrum with the measured cluster redshift
(see section 2.3), a metal abundance of 0.3 solar, and the hydrogen
column density for the cluster coordinates from Dickey & Lockman
(1990ARA&A..28..215D 1990ARA&A..28..215D). The temperature of the model was derived
iteratively by constraining the cluster to obey the L-T relation,
TX=2.76L0.33bolkeV (White et al., 1997, Cat. J/MNRAS/292/419).
Note (2): We assumed q0=0.5 and H0=50km/s/Mpc
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [WARP]
6- 18 A13 --- WARPS WARPS Name (JHHMM.m+DDMMW) (G1)
20-110 A91 --- OName Known aliases usually listed as in NED
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Global Notes:
Note (G1): WARPS JHHMM.m+DDMMW in Simbad.
History:
From electronic version of the journal
References:
Scharf et al., Paper I 1997ApJ...477...79S 1997ApJ...477...79S
Jones et al., Paper II 1998ApJ...495..100J 1998ApJ...495..100J
Ebeling et al., Paper III 2000ApJ...534..133E 2000ApJ...534..133E
Fairley et al., Paper IV 2000MNRAS.315..669F 2000MNRAS.315..669F
Ebeling et al., Paper V 2001ApJ...548L..23E 2001ApJ...548L..23E
Perlman et al., Paper VI 2002ApJS..140..265P 2002ApJS..140..265P, Cat. J/ApJS/140/265
(End) Emmanuelle Perret [CDS] 30-Jul-2009