1RXS
1RXS is an acronym which is the prefix used for the First ROSAT X-ray Survey. This is a catalogue of astronomical objects that were visible in the X-ray spectrum from the ROSAT satellite, in the field of X-ray astronomy.
Examinations of 1RXS has shown that many sources can be identified, such as old neutron stars, while other entries are "intriguing", according to one researcher.