Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apl%26c..36..191d&link_type=abstract
Astrophysical Letters and Communications, Vol. 36, Nos. 1 - 6, p. 191 - 194
Astronomy and Astrophysics
Astrophysics
Clusters Of Galaxies: X-Ray Surveys, Clusters Of Galaxies: X-Ray Luminosities, Clusters Of Galaxies: Redshift Surveys
Scientific paper
The authors describe the construction of an X-ray selected, flux limited sample of 111 clusters of galaxies from the ESO Key Programme "A Redshifts Survey of ROSAT Clusters of Galaxies". First, the authors discuss a new method - "the steepness ratio technique" (SRT) - which they have used to derive X-ray fluxes for the sources. Then, the authors describe the selection criteria applied to the ESO sample in order to maximize the degree of completeness of the flux limited sample. On the basis of a thorough analysis of the data, they estimate the sample to be complete at the >97% level. Finally, the authors derive a log N - log S distribution with a limiting flux of ≡3×10-12 erg s-1cm2 in the 0.5 - 0.2 keV band.
Böhringer Hans
Chincarini Guido
de Grandi Sabrina
Guzzo Luigi
Molendi Silvano
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