ACDS V10.0 - Sun Apr 28 10:15:14 CEST 2019

VIZIER logo


Detailed Description of VII/175 :
Edinburgh-Durham Southern Galaxy Cat. - Cluster Cat. (Lumsden+ 1992)

XMM logo

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.
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
================================================================================
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:

FileName Lrecl Records Explanations
× 80 . This file × ReadMe 80 . this file × table3 92 737 the Edinburgh-Durham cluster catalogue
Byte-by-byte Description of file: table3
Bytes Format Units Label Explanations
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)
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
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: 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