J/MNRAS/339/913 Two distant massive clusters of galaxies (Edge+, 2003)
The discovery of two distant, massive clusters of galaxies in the
ROSAT All-Sky Survey.
Edge A.C., Ebeling H., Bremer M., Rottgering H., Van Haarlem M.P.,
Rengelink R., Courtney N.J.D.
<Mon. Not. R. Astron. Soc. 339, 913 (2003)>
=2003MNRAS.339..913E 2003MNRAS.339..913E
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Radio sources
Keywords: galaxies: clusters: individual: MACS J0717.5 +3745 -
galaxies: clusters: individual: MACS J1621.3 +3810 -
cooling flows - radio continuum: galaxies
Abstract:
We discuss the radio, optical, and X-ray properties of two newly
discovered, very X-ray luminous, distant clusters of galaxies. Both
systems were noted as cluster candidates in a cross-correlation of
data from the WENSS (VIII/162) radio survey and the ROSAT All-Sky
Survey (IX/10). Follow-up observations performed by us and the
Massive Cluster Survey (MACS) team confirmed both sources as distant
galaxy clusters. The first cluster, MACS J0717.5+3745 at a redshift of
z=0.5548, contains a very extended, steep-spectrum radio source offset
from the cluster core, making it the most distant radio relic known.
The second cluster, MACS J1621.3+3810 at z=0.465, is a strong cooling
flow with a relatively weak central radio source. We present results
from ROSAT High-Resolution Imager (HRI, Cat. IX/28) observations of
both clusters as well as from optical imaging and VLA radio
interferometry observations. Our discoveries demonstrate that distant
clusters can be efficiently identified in a relatively shallow X-ray
survey, that radio/X-ray selection is efficient, and that both cooling
flow and non-cooling flow clusters are selected.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 107 112 Identifications of cluster candidates and
known clusters with z>0.3.
refs.dat 71 17 References
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000)
I/221 : The Magellanic Catalogue of Stars - MACS (Tucholke+ 1996)
VIII/62 : The Westerbork Northern Sky Survey (Leiden, 1998)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- RASS-BSC RASS-BSC designation (JHHMMSS.s+DDMMSS)
17 A1 --- n_RASS-BSC [*] Note (1)
19- 33 A15 --- WENSS WENSS designation (WNBHHMM.m+DDMM)
34- 37 F4.1 arcsec OffSet Offset between RASS-BSC and WENSS objects
39- 43 I5 mJy Flux WENSS Integrated flux density at 330MHz
45- 49 F5.2 --- Sp-Index Spectral index (alpha1.4GHz365MHz)
51 A1 --- P1.4GHz [YN] Polarized flag, Pol1.4GHz>2%
53 A1 --- Obs? [YN-] Observed ?
55-104 A50 --- Note Comments, identifications and redshifts (2)
106-107 I2 --- Ref ? Reference for redshift specified in Com,
in refs.dat file (3)
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Note (1): Sources marked with an asterisk do not meet the final selection
criteria but were imaged to provide a control sample.
Note (2): MACS JHHMM.m+DDMM identified as MCS JHHMMm+DDMM in Simbad
Note (3): References are given to all redshifts published in the last decade.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 48 A25 --- Aut Author's name
50- 72 A23 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 27-May-2003