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Astron. Astrophys. 319, 459-469 (1997) AcknowledgementsWe thank our colleagues from the MPE ROSAT group for their support. This research has made use of the SIMBAD database operated at CDS, Strasbourg and of data obtained through the High Energy Astrophysics Science Archive Research Center Online Service, provided by the NASA-Goddard Space Flight Center. The ROSAT project is supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF/DARA) and the Max-Planck-Gesellschaft (MPG).
© European Southern Observatory (ESO) 1997 Online publication: July 3, 1998 ![]() |