  Identified radio supernova remnants (SNRs) in the Galaxy comprise an
incomplete sample of the SNR population due to various selection effects. ROSAT
performed the first all-sky survey with an imaging X-ray telescope, and thus
provides another window for finding SNRs and compact objects that may reside
within them. Performing a search for extended X-ray sources in the ROSAT
all-sky survey database about 350 objects were identified as SNR candidates in
recent years (Busser 1998). Continuing this systematic search, we have
reanalysed the ROSAT all-sky survey (RASS) data of these candidates and
correlated the results with radio surveys like NVSS, ATNF, Molonglo and
Effelsberg. A further correlation with SIMBAD and NED was performed for
subsequent identification purposes. About 50 of the 350 candidates turned out
to be likely galaxies or clusters of galaxies. We found 14 RASS sources which
are very promising SNR candidates and are currently subject of further
follow-up studies. We will provide the details of the identification campaign
and present first results.
