The XMM-Newton Science Archive (XSA) became publicly available in April 2002. The XMM-Newton Science Archive content is regularly updated with all the generated ODF, SDF and PPS products and with updated versions of the catalogues of EPIC sources, OM sources and Slew Survey sources, and ancillary info like associated proposal abstract, publications, etc.
In 2012-13 the SSC performed the second bulk reprocessing of all XMM-Newton data obtained since the beginning of the mission in 1999, and all data are thus processed with SAS 12.0 or higher.
PIs of XMM-Newton observations can retrieve their own proprietary data using their password-protected XSA account.
Public data can be retrieved through the XSA user interface: http://nxsa.esac.esa.int/nxsa-web/. Data can also be retrieved directly from the archive via URL or command line (see examples at the Archive Inter Operability system (AIO) help page: http://nxsa.esac.esa.int/nxsa-web/#aio). XSA database tables can be queried using ADQL (Astronomical Data Query Language), see the Table Access Protocol (tap) help page (http://nxsa.esac.esa.int/nxsa-web/#tap) for details.
On-the-fly data analysis and processing can be performed from the XMM-Newton Science Archive interface using the Science Analysis System (SAS) without the need of
downloading data or software. This is done internally via the Remote
Interface for Science Analysis (RISA) server (see the RISA Technical
Note, https://www.cosmos.esa.int/documents/332006/1361013/SW-TN-0035-1-0.pdf and the Interactive Data Analysis help page http://nxsa.esac.esa.int/nxsa-web/#risaHelp).
To obtain an upper limit from XMM-Newton slew and/or pointed
observations at a given sky position, there is an Upper Limit
Server available at
http://www.cosmos.esa.int/web/xmm-newton/uls.
Of interest may also be the http://www.ledas.ac.uk/flix/flix_dr5.html server providing flux
limits from images taken with XMM-Newton; see section A.3.2.