J/MNRAS/371/1777 X-ray properties of 3 EDisCS galaxy clusters (Johnson+, 2006)
The X-ray properties of optically selected z > 0.6 clusters in the European
Southern Observatory Distant Cluster Survey.
Johnson O., Best P., Zaritsky D., Clowe D., Aragon-Salamanca A.,
Halliday C., Jablonka P., Milvang-Jensen B., Pello R., Poggianti B.M.,
Rudnick G., Saglia R., Simard L., White S.
<Mon. Not. R. Astron. Soc. 371, 1777 (2006)>
=2006MNRAS.371.1777J 2006MNRAS.371.1777J
ADC_Keywords: X-ray sources ; Clusters, galaxy ; Photometry, CCD ;
Photometry, VRI
Keywords: galaxies: clusters: general - X-rays; galaxies; clusters
Abstract:
We present XMM-Newton observations of three optically selected z>0.6
clusters from the European Southern Observatory (ESO) Distant Cluster
Survey (EDisCS), comprising the first results of a planned X-ray
survey of the full EDisCS high-redshift sample. The EDisCS clusters
were identified in the Las Campanas Distant Cluster Survey as surface
brightness fluctuations in the optical sky and their masses and galaxy
populations are well described by extensive photometric and
spectroscopic observations. We detect two of the three clusters in the
X-ray and place a firm upper limit on diffuse emission in the third
cluster field. We are able to constrain the X-ray luminosity and
temperature of the detected clusters and estimate their masses. We
find that the X-ray properties of the detected EDisCS clusters are
similar to those of X-ray-selected clusters of comparable mass and ---
unlike other high-redshift, optically selected clusters --- are
consistent with the T-sigma and LX-sigma relations determined from
X-ray-selected clusters at low redshift. The X-ray determined mass
estimates are generally consistent with those derived from
weak-lensing and spectroscopic analyses. These preliminary results
suggest that the novel method of optical selection used to construct
the EDisCS catalogue may, like selection by X-ray luminosity, be well
suited for identification of relaxed, high-redshift clusters whose
intracluster medium is in place and stable by z=0.8.
Description:
Catalogs of X-ray and optical properties of X-ray point sources in
three cluster fields observed with XMM-Newton in support of the
European Southern Observatory Distant Cluster Survey (EDisCS):
Cl1216-1201, Cl1054-1145, and Cl040-1155. Tables give X-ray properties
(X-ray position, source counts, fluxes, hardness ratio) and optical
properties of possible optical counterparts (optical position,
likelihood of association, VRI photometry) for all sources in the XMM
FOV.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table12.dat 125 3 Properties of EDisCS clusters observed with
XMM-Newton and properties of XMM observations
of three EDisCS clusters
tablea1.dat 96 75 X-ray catalog for Cl1216-1201
tablea2.dat 96 67 X-ray catalog for Cl1054-1145
tablea3.dat 96 67 X-ray catalog for Cl1040-1155
tableb1.dat 65 98 Optical associations for Cl1216-1201
tableb2.dat 65 82 Optical associations for Cl1054-1145
tableb3.dat 65 88 Optical associations for Cl1040-1155
tabb456.dat 106 42 Additional optical properties of candidate
counterparts to X-ray sources lying within the
FOV of deep, multiband VLT observations
notes.dat 80 80 Individual notes
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See also:
J/A+A/427/397 : Redshifts of 5 EDisCS galaxy clusters (Halliday+, 2004)
J/ApJ/630/206 : Hα data for 3 EDisCS galaxy clusters (Finn+, 2005)
J/A+A/444/365 : ESO Distant Cluster Survey, EDisCS (White+, 2005)
Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Cluster Cluster name
13- 14 I2 h RAh Cluster right ascension (J2000)
16- 17 I2 min RAm Cluster right ascension (J2000)
19- 22 F4.1 s RAs Cluster right ascension (J2000)
24 A1 --- DE- Cluster declination sign (J2000)
25- 26 I2 deg DEd Cluster declination (J2000)
28- 29 I2 arcmin DEm Cluster declination (J2000)
31- 32 I2 arcsec DEs Cluster declination (J2000)
34- 37 F4.2 --- z Redshift
39- 40 I2 --- Nmb Number of spectroscopically confirmed
members
42- 45 I4 km/s sigma Spectroscopically determined
velocity dispersion
47- 48 I2 km/s E_sigma Error on sigma (upper limit)
50- 51 I2 km/s e_sigma Error on sigma (lower limit)
53 A1 --- l_Mass Limit flag on Mass
54- 56 F3.1 10+14solMass Mass Estimated cluster mass (1)
58- 70 A13 --- Date Observation dates (YYYY/MM/DD-DD)
72- 81 I10 --- ObsID Observation ID
83- 84 I2 h RAXh XMM aim-point right ascension (J2000)
86- 87 I2 min RAXm XMM aim-point right ascension (J2000)
89- 92 F4.1 s RAXs XMM aim-point right ascension (J2000)
94 A1 --- DEX- XMM aim-point declination sign (J2000)
95- 96 I2 deg DEXd XMM aim-point declination (J2000)
98- 99 I2 arcmin DEXm XMM aim-point Declination (J2000)
101-102 I2 arcsec DEXs XMM aim-point Declination (J2000)
104-107 F4.1 ks EpxTime Exposure time
109-111 F3.1 ct/s CRBmos MOS background rate (7-15keV)
113-115 F3.1 ct/s CRBpn PN background rate (7-15keV)
117-120 F4.1 ks Tmos MOS 'on' time
122-125 F4.1 ks Tpn PN 'on' time
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Note (1): Mass estimates are derived from the weak-lensing analysis of
Clowe et al. (2006A&A...451..395C 2006A&A...451..395C) and quoted at a radius of 1Mpc.
No significant peak was detected in the weak-lensing mass
reconstruction map for Cl10401155; the mass estimate quoted for this
cluster is a 2σ upper limit. All other values are from Halliday
et al. (2004, Cat. J/A+A/427/397).
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Byte-by-byte Description of file: tablea1.dat tablea2.dat tablea3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Cluster Cluster name
13- 21 A9 --- ID X-ray source ID (G1)
23- 24 I2 h RAh Right ascension (J2000.0)
26- 27 I2 min RAm Right ascension (J2000.0)
29- 33 F5.2 s RAs Right ascension (J2000.0)
35 A1 --- DE- Declination sign (J2000.0)
36- 37 I2 deg DEd Declination (J2000.0)
39- 40 I2 arcmin DEm Declination (J2000.0)
42- 45 F4.1 arcsec DEs Declination (J2000.0)
47- 49 F3.1 arcsec e_Pos Positional error
51- 56 F6.1 ct Counts Total X-ray counts
58- 61 F4.1 --- Sig Source significance
63- 67 F5.1 10-14mW/m2 FFull X-ray flux in the 0.5-8keV full band
69- 71 F3.1 10-14mW/m2 e_FFull Error on 0.5-8keV flux
73- 76 F4.1 10-14mW/m2 FSoft X-ray flux in the 0.5-2keV soft flux
78- 80 F3.1 10-14mW/m2 e_FSoft Error on 0.5-2keV flux
82- 86 F5.1 10-14mW/m2 FHard ?=- X-ray flux in the 2-8keV hard flux
88- 90 F3.1 10-14mW/m2 e_FHard ?=- Error on 2-8keV flux
92- 96 F5.2 --- HR Hardness ratio (HR=(H-S)/(H+S))
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Byte-by-byte Description of file: tableb1.dat tableb2.dat tableb3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Cluster Cluster name
13- 21 A9 --- ID X-ray source ID (G1)
23- 24 I2 h RAh ?=- Right Ascension J2000 (hours)
26- 27 I2 min RAm ?=- Right Ascension J2000 (minutes)
29- 33 F5.2 s RAs ?=- Right Ascension J2000 (seconds)
35 A1 --- DE- Declination J2000 (sign)
36- 37 I2 deg DEd ?=- Declination J2000 (degrees)
39- 40 I2 arcmin DEm ?=- Declination J2000 (minutes)
42- 45 F4.1 arcsec DEs ?=- Declination J2000 (seconds)
47- 50 F4.2 --- Pid ?=- Probability of association
52- 55 F4.1 mag Vmag ?=- V-band magnitude
57- 60 F4.1 mag Rmag ?=- R-band magnitude
62- 65 F4.1 mag Imag ?=- I-band magnitude
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Byte-by-byte Description of file: tabb456.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Cluster Cluster name
13- 21 A9 --- ID X-ray source ID (G1)
23- 27 A5 --- --- [EDCSN]
28- 43 A16 --- EDCSN Optical ID, EDCSN JHHMMSSs-DDMMSSs
45- 48 F4.2 --- Pid Probability of association
50- 53 F4.1 mag Bmag B-band magnitude
55- 58 F4.1 mag Vmag V-band magnitude
60- 63 F4.1 mag Imag I-band magnitude
65- 68 F4.1 mag Jmag ?=- J-band magnitude
70- 73 F4.1 mag Kmag ?=- K-band magnitude
75- 78 F4.2 --- z1 Redshift from Bolzonella et al.,
2000A&A...363..476B 2000A&A...363..476B
80 A1 --- --- [(]
81- 85 F5.2 --- Pmemb1 Membership probability from z1
86 A1 --- --- [)]
88- 91 F4.2 --- z2 Redshift from Ruddnick et al., 2001,
Cat. J/AJ/122/2205 and 2003ApJ...599..847R 2003ApJ...599..847R
93 A1 --- --- [(]
94- 98 F5.2 --- Pmemb2 Membership probability from z2
99 A1 --- --- [)]
101-104 F4.2 --- zQSO Best-fitting redshift using a quasar template
106 A1 --- n_ID [*] indicates a note in notes.dat file
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ID X-ray source ID (G1)
11- 80 A70 --- Note Text of the note
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Global notes:
Note (G1): X-rays sources names as:
Cl1040_NN for Cl1216-1201 sources,
Cl1054_NN for Cl1054-1145 sources,
Cl1216_NN for Cl1040-1155 sources.
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Acknowledgements:
Olivia Johnson, cocj(at)roe.ac.uk
(End) Olivia Johnson [IfA, Edinburgh], Patricia Vannier [CDS] 13-Nov-2006