next previous
Up: Abstract

A&A Supplement series, Vol. 127, January II 1998, 145-152

Received February 13; accepted April 25, 1997

The Hamburg/RASS Catalogue of optical identificationsgif

N. Bade tex2html_wrap987 - D. Engels tex2html_wrap987 - W. Voges tex2html_wrap991 - V. Beckmann tex2html_wrap987 - Th. Boller tex2html_wrap991 - L. Cordis tex2html_wrap987 - M. Dahlem tex2html_wrap999 - J. Englhauser tex2html_wrap991 - K. Molthagen tex2html_wrap987 - P. Nass tex2html_wrap1005 - J. Studt tex2html_wrap987 - D. Reimers tex2html_wrap987

Send offprint request: N. Bade; e-mail:

tex2html_wrap1011  Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany
tex2html_wrap1013  Max-Planck-Institut für extraterrestrische Physik, D-85740 Garching, Germany
tex2html_wrap1015  ESTEC, Astrophysics Division, Postbus 299, NL-2200 AG Noordwijk, The Netherlands


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 8480deg2 of the high galactic latitude (tex2html_wrap_inline969) northern sky. For tex2html_wrap_inline971 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.

keywords: X-ray sources: general -- galaxies -- stars

Copyright by the European Southern Observatory (ESO)