Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1051h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1051-1056.
Astronomy and Astrophysics
Astronomy
8
Galactic Clusters, Sky Surveys (Astronomy), X Ray Astronomy, Astronomical Catalogs, Luminosity
Scientific paper
X-ray data are employed to determine whether systematic errors are present in the survey by Abell (1958) of rich clusters of galaxies. The subsample is examined in terms of: (1) entries misidentified as rich clusters; (2) entries grossly misclassified in terms of distance class or richness class; and (3) the existence of rich clusters that are omitted from the survey. A total of 104 clusters are examined in terms of their X-ray emission, and the X-ray and optical characteristics are listed for the subsamples. Extreme values for luminosity are used to identify major inconsistencies, and the Gehan and Logrank are applied to quantify the comparative results. Comparisons to the Medium Surveys by Gioia et al. (1990) and Maccacaro et al. (1982) show no evidence of systematic errors that would invalidate the use of limited samples from Abell to study large-scale structure. The present study confirms the validity and efficacy of using Abell observational data to investigate large-scale studies.
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