The X-ray catalogue derived from the medium deep ROSAT Survey in HS 47.5/22
contains in total 574
X-ray sources with likelihoods 
and broad band fluxes 
.
The analyses of both individual pointings and merged data were proven to be
necessary to find all the X-ray sources in the field. As a completeness test
for the catalogue, the 
-curve was created and compared with
the literature (Molthagen 1996). We found that for sources with
, our catalogue is of comparable completeness with previous
works down to a broad band flux
;
details of this and other results (e.g. variability) will be given
elsewhere (Molthagen, in preparation).
Acknowledgements
We wish to thank the HQS group for their readiness to share experience
and software, and especially for giving access to their data prior to
publication. KM wishes to thank N. Bade for his help with the follow-up
observations, and the MPE Garching for the possibility to perform the
merging of the X-ray pointings, and analysis thereof, in Garching.
We acknowledge that C. Feldt performed and reduced the 100m RT 21cm
line observations.
This work has made use of the NASA/IPAC Extragalactic Database (NED),
which is operated by the Jet Propulsion Laboratory, California Institute
of Technology, under contract with the National Aeronautics and Space
Administration.
Part of this work was supported by a grant from the BMFT (DARA
FKZ 50OR9308).