VII/175 Edinburgh-Durham Southern Galaxy Cat. - Cluster Cat. (Lumsden+ 1992)
The Edinburgh-Durham southern galaxy catalogue -
IV. The cluster catalog
Lumsden S.L., Nichol R.C., Collins C.A., Guzzo L.
<Mon. Not. R. Astron. Soc. 258, 1 (1992)>
=1992MNRAS.258....1L 1992MNRAS.258....1L
ADC_Keywords: Clusters, galaxy
Keywords: catalogues-galaxies: clustering
Abstract:
We present the Edinburgh-Durham Cluster Catalogue (EDCC). This is the
first machine-based, objectively selected sample of clusters of
galaxies. It consists of 737 clusters or groups of all richnesses,
over 0.5 sr of sky, centred on the South Galactic Pole (SGP). The
primary galaAy data set for the cluster survey is the
Edinburgh-Durham Southern Galaxy Catalogue (EDSGC). The EDCC was
constructed using an automatic peak-finding algorithm and is complete
to m10(bj) = 18.75. In a comparison with the Abell clusters in
the same region, we detect 80 per cent of their rich clusters
nominally brighter than our completion limit in addition to many new
systems. This suggests that the EDCC is 90 per cent complete for
Abell-type clusters. We also conclude that the Abell magnitude system
is biased towards bright magnitudes for most of their clusters, and
that their richness estimates are prone to a larger uncertainty than
they suggest. The EDCC therefore supersedes the Abell catalogue as a
data base for statistical studies of cluster properties.
See also:
J/MNRAS/274/1071 : Edinburgh-Milano cluster redshift survey (Collins+ 1995)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . this file
table3 92 737 the Edinburgh-Durham cluster catalogue
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Byte-by-byte Description of file: table3
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Bytes Format Unit Label Explanation
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1- 5 I5 --- EDCC [1,769]+ sequential EDCC cluster
identification number
6 A1 --- u_EDCC [?] uncertainty flag on EDCC, indicating
that such clusters could not be
distinguished from the surrounding field
(see paper, p6R)
8- 9 I2 h RAh right ascension (hours) (B1950)
11- 12 I2 min RAm right ascension (minutes)
14- 17 F4.1 s RAs right ascension (seconds)
21 A1 --- DE- [-]! declination sign
22- 23 I2 deg DEd declination (degrees) (B1950)
25- 26 I2 arcmin DEm declination (minutes)
28- 31 F4.1 arcsec DEs declination (seconds)
34- 38 F5.2 mag M1 magnitude of first brightest member
41- 45 F5.2 mag M3 magnitude of third brightest member
48- 52 F5.2 mag M10 magnitude of tenth brightest member
53 A1 --- u_M10 [*] uncertainty flag of M10 where the visual
inspection gave a clearly different result
(see paper, p6R)
55- 57 I3 ct Nclus [0,] number of galaxies within the Abell
radius between M3 and M3+2 "after" the
background galaxies have been removed
58 A1 --- u_Nclus [*] uncertainty flag of Nclus (see u_M10)
60- 62 I3 ct Nback [0,] number of background galaxies within
the same radius to the same magnitude
limit (see Nclus, and paper p6R)
66- 70 F5.3 deg THA [0,] Abell radius
74 A1 --- F [F]! character 'F' for field number
75- 77 I3 --- FIELD [0,] Schmidt J survey field number
80 I1 ct RUN1 number of times the cluster was located in
run 1 (see paper p2)
81 I1 ct RUN2 the above in run 2
82 I1 ct RUN3 the above in run 3
85 A1 --- DEB [d] 'd'= the cluster was deblended, ' '= not
87- 91 A5 --- ACO [0-9S ] Abell identification number (see
paper p6R) (1)
92 A1 --- u_ACO [:] only the clusters' Abell radii overlap (1)
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Note (1): ACO-identifications in the last column were aligned and
brackets converted to a ':' sign AFTER the cluster number.
-- H.A. 22-Oct-1992
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Historical notes:
The catalogue was provided by courtesy of R.C.Nichol to H. Andernach;
it was numbered A144 in H. Andernach's "List of Astronomical Catalogues
and Documents kindly provided on request by various authors"
References:
The papers of this series are as follows:
Paper I: MNRAS 236, 7p (1988) "First results on the galaxy angular
correlation function"
Paper II: MNRAS 238, 379 (1989) "Image classification and galaxy
number counts"
Paper III: MNRAS 254, 295 (1992) "w(theta) from the full survey"
Paper V: MNRAS 255, 21p (1992) "The cluster correlation function"
Paper VI: MNRAS 265, 867 (1993) "The stability of w(theta)"
The EDSGC is not yet published in these papers.
(End) Koichi Nakajima [CDS] 11-Mar-1994