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The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s-1

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Title:
The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s-1
Authors:
Schwope, A.; Hasinger, G.; Lehmann, I.; Schwarz, R.; Brunner, H.; Neizvestny, S.; Ugryumov, A.; Balega, Yu.; Trümper, J.; Voges, W.
Journal:
Astronomische Nachrichten, vol. 321, no. 1, p. 1-52.
Publication Date:
00/2000
Origin:
AN
Abstract Copyright:
(c) 2000: Astronomische Nachrichten
DOI:
10.1002/(SICI)1521-3994(200003)321:1<1::AID-ASNA1>3.0.CO;2-C
Bibliographic Code:
2000AN....321....1S

Abstract

We present a summary of an identification program of the more than 2000 X-ray sources detected during the ROSAT All-Sky Survey (Voges et al. 1999) at high galactic latitude, |b| > 30degr , with countrate above 0.2 s-1. This program, termed the ROSAT Bright Survey RBS, is to more than 99.5% complete. A sub-sample of 931 sources with countrate above 0.2 s-1 in the hard spectral band between 0.5 and 2.0 keV is to 100% identified. The total survey area comprises 20391 deg2 at a flux limit of 2.4 x 10-12 erg cm-2 s-1 in the 0.5 - 2.0 keV band. About 1500 sources of the complete sample could be identified by correlating the RBS with SIMBAD and the NED. The remaining ~ 500 sources were identified by low-resolution optical spectroscopy and CCD imaging utilizing telescopes at La Silla, Calar Alto, Zelenchukskaya and Mauna Kea. Apart from completely untouched sources, catalogued clusters and galaxies without published redshift as well as catalogued galaxies with unusual high X-ray luminosity were included in the spectroscopic identification program. Details of the observations with an on-line presentation of the finding charts and the optical spectra will be published separately. Here we summarize our identifications in a table which contains optical and X-ray information for each source. As a result we present the most massive complete sample of X-ray selected AGNs with a total of 669 members and a well populated X-ray selected sample of 302 clusters of galaxies with redshifts up to 0.70. Three fields studied by us remain without optical counterpart (RBS0378, RBS1223, RBS1556). While the first is a possible X-ray transient, the two latter are isolated neutron star candidates (Motch et al. 1999, Schwope et al. 1999).

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