If your question isn't answered here or addressed in other pages, contact the Archive Hotseat . As of August 1998, the HDA contains over 5.2 Tbytes of science and engineering data, for a total of approximately 150,000 science exposures. Archive , which contains 467 observations of 169 objects. The Catalogs and Surveys Branch of the STScI has been digitizing the photographic Sky Survey plates from the Palomar and UK Schmidt telescopes in order to support HST operations and provide a service to the astronomical community.
Archive users can easily retrieve image data for any part of the sky.
MAST provides access to the radio images and the source catalog, which currently includes about 437,000 entries. Every single archive can be searched using its search page. Links to the Web pages of the various archives included in MAST are available from the MAST main page . The MAST Cross Correlation page provides a facility to allow the user to cross-correlate lists of positions with data in our archives. You can compile lists externally or use one of our online catalogs.