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Title:
The Hamburg/RASS Catalogue of optical identifications
Authors:
Bade, N.; Engels, D.; Voges, W.; Beckmann, V.; Boller, Th.; Cordis, L.; Dahlem, M.; Englhauser, J.; Molthagen, K.; Nass, P.; Studt, J.; Reimers, D.
Affiliation:
AA(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AB(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AC(Max-Planck-Institut fur extraterrestrische Physik, D-85740 Garching, Germany), AD(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AE(Max-Planck-Institut fur extraterrestrische Physik, D-85740 Garching, Germany), AF(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AG(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany; ESTEC, Astrophysics Division, Postbus 299, NL-2200 AG Noordwijk, The Netherlands), AH(Max-Planck-Institut fur extraterrestrische Physik, D-85740 Garching, Germany), AI(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AJ(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany; Max-Planck-Institut fur extraterrestrische Physik, D-85740 Garching, Germany), AK(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany), AL(Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany)
Publication:
Astronomy and Astrophysics Supplement, v.127, p.145-152 (A&AS Homepage)
Publication Date:
01/1998
Origin:
A&AS
A&A Keywords:
X-RAY SOURCES: GENERAL, GALAXIES, STARS
DOI:
10.1051/aas:1998339
Bibliographic Code:
1998A&AS..127..145B

Abstract

We present the Hamburg/RASS Catalogue of optical identifications (HRC). The catalogue contains optical information about objects inside the error circles of ROSAT All-Sky Survey (RASS) sources. The information was gathered from objective prism and direct plates taken by the Hamburg Quasar Survey (HQS). The plates enable an effective selection of several X-ray emitting classes of objects, as there are galaxies, AGN, QSOs, galaxy clusters and several types of galactic stars, in particular M dwarfs, hot white dwarfs and cataclysmic variables. In the current state (November 1996) the HRC contains information about 3847 X-ray positions and covers about 8480deg(2) of the high galactic latitude ( |b| > 20degr ) northern sky. For 81.2% of the X-ray sources a plausible optical counterpart is given. The counterparts of the remaining sources are probably faint ( B > 18.5) AGN and galaxy clusters. The HRC is available electronically together with finding charts taken from the digitized direct HQS plates. Based on observations from the German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanish National Commission for Astronomy.

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