Astron. Astrophys. 319, 413-429 (1997)

Acknowledgements

The ROSAT project is supported by the Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and the Max-Planck-Gesellschaft. We thank W. Voges for supplying data from the newest reprocessing of the RASS and our colleagues from the ROSAT group for their support, M. Véron-Cetty for supplying a machine readable form of their catalogue, and J. Baker and E. Feigelson for communicating radio core fluxes. We thank the referee, P. Véron, for many useful comments for the improvement of the manuscript. This research has made use of the NASA/IPAC Extragalactic Data Base (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998
helpdesk@link.springer.de