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29 March 2024
 
  » arxiv » astro-ph/0003219

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The Northern ROSAT All-Sky (NORAS) Galaxy Cluster Survey I: X-ray Properties of Clusters Detected as Extended X-ray Sources
H. Boehringer ; W. Voges ; J.P. Huchra ; B. McLean ; R. Giacconi ; P. Rosati ; R. Burg ; J. Mader ; P. Schuecker ; D. Simic ; S. Komossa ; T.H. Reiprich ; J. Retzlaff ; J. Truemper ;
Date 15 Mar 2000
Journal Astrophys.J.Suppl. 129 (2000) 435-474
Subject astro-ph
AbstractIn the construction of an X-ray selected sample of galaxy clusters for cosmological studies, we have assembled a sample of 495 X-ray sources found to show extended X-ray emission in the first processing of the ROSAT All-Sky Survey. The sample covers the celestial region with declination $delta ge 0deg $ and galactic latitude $|b_{II}| ge 20deg $ and comprises sources with a count rate $ge 0.06$ counts s$^{-1}$ and a source extent likelihood of 7. In an optical follow-up identification program we find 378 (76%) of these sources to be clusters of galaxies. ...
Source arXiv, astro-ph/0003219
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