The ROSAT Results Archive (RRA) is currently being produced by the five participating ROSAT institutions: MaxPlanckInstitut f¨ur extraterrestrische Physik (MPE), Goddard Space Flight Center (GSFC),Smithsonian Astrophysical Observatory (SAO), Leicester University (LU), and Astrophysikalisches Institut Potsdam (AIP). It will be a public archive that contains all the sources in all the released ROSAT HRI and PSPC pointed observations (about 5000 so far, and still increasing). All sources will be quality checked, both by automatic and by human interaction. Some sources will get quality flags indicating certain suspicious properties. The RRA is based on and part of the ROSAT Data Archive. Whereas the latter contains all the raw data of the pointed observations (e.g., arrival time and coordinates of each photon), the RRA will contain identified sources with quality flags. We expect the RRA to become publicly available in the third quarter of 1995, and it will contain verified sources in (almost) all pointings that are public at that time. From then on it will be fed continuously with qualitychecked sequence as they become public. The RRA will be a very useful data base for all kinds of studies of ROSAT sources. It can be used both for individual or statistical studies, e.g. for correlations with catalogs in other wavelength regimes.
IAU Commission on Instruments
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