XCATDB

• Thew XCATDB is an interface of the Science Survey Consortium for the XMM-Newton Catalogue.
• It contains 200,000 distinct X-ray sources linked with 1,000,000 archival sources extracted from 200 catalogues, 72000 images and 100.000 spectra.
• This interface takes advantage of Saada relationships and of the possibility of expressing queries with UCDs to propose a data-mining oriented features.

 3CSnapshots

• Images from the HST Snapshot Surveys of 3CR Radio Sources
• Published as SIA server in the VO registry