J/ApJ/799/60 X-ray galaxy clusters in the CFHTLS fields (Mirkazemi+, 2015)
Brightest X-ray clusters of galaxies in the CFHTLS wide fields: catalog and
optical mass estimator.
Mirkazemi M., Finoguenov A., Pereira M.J., Tanaka M., Lerchster M.,
Brimioulle F., Egami E., Kettula K., Erfanianfar G., McCracken H.J.,
Mellier Y., Kneib J.P., Rykoff E., Seitz S., Erben T., Taylor J.E.
<Astrophys. J., 799, 60 (2015)>
=2015ApJ...799...60M 2015ApJ...799...60M
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ; Velocity dispersion
Keywords: catalogs; cosmology: observations; galaxies: clusters: general;
surveys; X-rays: galaxies: clusters
Abstract:
The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) presents a
unique data set for weak-lensing studies, having high-quality imaging
and deep multiband photometry. We have initiated an XMM-CFHTLS project
to provide X-ray observations of the brightest X-ray-selected clusters
within the wide CFHTLS area. Performance of these observations and the
high quality of CFHTLS data allow us to revisit the identification of
X-ray sources, introducing automated reproducible algorithms, based on
the multicolor red sequence finder. We have also introduced a new
optical mass proxy. We provide the calibration of the red sequence
observed in the Canada-France-Hawaii filters and compare the results
with the traditional single-color red sequence and photo-z. We test
the identification algorithm on the subset of highly significant XMM
clusters and identify 100% of the sample. We find that the integrated
z-band luminosity of the red sequence galaxies correlates well with
the X-ray luminosity, with a surprisingly small scatter of 0.20dex.
We further use the multicolor red sequence to reduce spurious
detections in the full XMM and ROSAT All-Sky Survey (RASS) data sets,
resulting in catalogs of 196 and 32 clusters, respectively. We made
spectroscopic follow-up observations of some of these systems with
HECTOSPEC and in combination with BOSS DR9 data. We also describe the
modifications needed to the source detection algorithm in order to
maintain high purity of extended sources in the shallow X-ray data. We
also present the scaling relation between X-ray luminosity and
velocity dispersion.
Description:
The main aim of the XMM-CFHTLS program is to efficiently find massive
galaxy clusters, through a series of short XMM-Newton follow-up
observations of faint RASS sources (Voges et al. 1999, IX/10)
identified as galaxy clusters using CFHTLS imaging data. In total, 73
observations of cluster candidates have been performed, using 220ks
of allocated time.
During 2003-2009, the 3.6m Canada-France-Hawaii Telescope (CFHT)
completed a very large imaging program known as the CFHTLS.
Follow-up observations of clusters in W1, W2, and W4 CFHTLS fields
were performed using Hectospec on MMT. In performing the analysis, we
have also added spectroscopic data in W1, W2, and W3 from the Sloan
Digital Sky Survey III.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 115 196 Catalog of XMM-CFHTLS X-ray selected galaxy clusters
table6.dat 118 32 Catalog of RASS-CFHTLS X-ray selected galaxy clusters
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012)
II/317 : The CFHTLS Survey (T0007 release) (Hudelot+ 2012)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
J/A+A/566/A140 : Catalog of XMM X-ray galaxy groups (Gozaliasl+, 2014)
J/ApJ/765/117 : X-ray group of galaxies in AEGIS (Erfanianfar+, 2013)
J/ApJ/756/139 : Group galaxies spectroscopic redshifts (Connelly+, 2012)
J/ApJ/746/178 : The augmented maxBCG cluster catalog (Rykoff+, 2012)
J/MNRAS/403/2063 : SXDF X-ray groups and galaxy clusters (Finoguenov+, 2010)
J/A+A/489/571 : VRizK photometry of RDCSJ0910+54 cluster (Tanaka+, 2008)
J/ApJS/172/182 : XMM Clusters of galaxies in COSMOS field (Finoguenov+ 2007)
J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)
J/ApJ/502/558 : Catalog of ROSAT galaxy clusters (Vikhlinin+ 1998)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [XCC]
4- 15 A12 --- XCC XMM-CFHTLS identifier (JHHMM.m+DDMM)
17- 24 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
26- 32 F7.4 deg DEdeg Declination in decimal degrees (J2000)
34- 37 F4.2 --- zRS [0.05/1.1] Red sequence redshift
39- 43 F5.2 --- alpha [-2.6/27] Red sequence significance α
45- 48 F4.2 --- e_alpha Uncertainty in alpha
50- 55 F6.2 10-17W/m2 Fx [0.08/129] The 0.5-2 keV X-ray flux; in
units of 10-14erg/cm2/s
57- 61 F5.2 10-17W/m2 e_Fx Uncertainty in Fx
63- 68 F6.2 10+35W Lx [0.6/440] Rest-frame 0.1-2.4keV X-ray
luminosity; in units of 1042erg/s
70- 75 F6.2 10+35W e_Lx Uncertainty in Lx
77- 81 F5.2 10+13Msun M200c [1.4/54] Total mass (1)
83- 87 F5.2 10+13Msun e_M200c [0.2/24] Uncertainty in M200c
89- 94 F6.3 arcmin R200c [1/12] Radius
96-102 F7.4 --- zsp [0.04/0.9]?=-1 Spectroscopic redshift (2)
104 I1 --- q_zsp [1/2] Visual flag, 1=obvious candidate (3)
106-108 I3 km/s sigma [180/675]?=-1 Velocity dispersion σ (4)
110-112 I3 km/s e_sigma [30/243]?=-1 Uncertainty in sigma (4)
114-115 I2 --- N [0/25] Number of spectroscopic members
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Note (1): Estimated from the X-ray luminosity using the Lx-M scaling relation
and its evolution from Leauthaud et al. (2010ApJ...709...97L 2010ApJ...709...97L).
Note (2): For clusters with a spectroscopic redshifts, M200c and R200c are
computed using spectroscopic redshift.
Note (3): The photometric and spectroscopic galaxy catalogs are fully utilized
during visual inspection for optical counterparts of the X-ray
sources. Obvious cluster candidates are marked with a visual flag "1"
in the catalog. Visual flag "2" is assigned to X-ray sources that
have low significance of the optical counterpart or concentration of
galaxies almost on the edge or out of the X-ray source, indicative of
a confused X-ray source. Figure 7 illustrates clusters with different
visual flags. See Section 3.2 for further details.
Note (4): For clusters having more than five spectroscopic members.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [RCC]
4- 15 A12 --- RCC XMM-CFHTLS identifier (JHHMM.m+DDMM)
17- 24 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
26- 34 F9.6 deg DEdeg Declination in decimal degrees (J2000)
36- 39 F4.2 --- zRS [0.06/0.8] Red sequence redshift
41- 44 F4.1 --- alpha [13/47] Red sequence significance α
46- 49 F4.1 --- e_alpha Uncertainty in alpha
51- 58 F8.4 deg RAOdeg Optical Right Ascension (J2000)
60- 67 F8.5 deg DEOdeg Optical Declination (J2000)
69- 73 F5.2 10-16W/m2 Fx [1/17] ROSAT X-ray flux; in units
of 10-13erg/cm2/s
75- 78 F4.2 10-16W/m2 e_Fx Uncertainty in Fx
80- 84 F5.1 10+35W Lx [4/645] ROSAT X-ray luminosity; in units
of 1042erg/s
86- 91 F6.2 10+35W e_Lx Uncertainty in Lx
93- 99 F7.4 --- zsp [0/0.7]?=-1 Spectroscopic redshift
(verified visually)
101-103 I3 km/s sigma [0/675]?=-1 Velocity dispersion σ
105-107 I3 km/s e_sigma [0/194]?=-1 Uncertainty in sigma
109-110 I2 --- N [0/19] Number of spectroscopic members
112-118 F7.4 [10-7W] logLX [43/44.2] Log X-ray luminosity (in erg/s) (1)
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Note (1): Estimated using the Lx-Ls where Ls is integrated z'-band luminosity.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 11-Jun-2015