The full analysis of XMM-Newton data includes quick look analysis of raw data, calibration of raw event dataset, screening of the calibrated data, extraction of images, extraction of spectra, extraction of time series, source detection and scientific analysis of the calibrated products. A large fraction of these tasks has to be conducted with the SAS, which has been developed by a team of scientists located at the ESA XMM-Newton SOC and at the XMM-Newton Survey Science Centre (SSC). Informations on how to download and install the SAS software package are available on the XMM-Newton web server at:
http://xmm.esac.esa.int/sas
Improvements of current SAS version over older versions can be checked in the "SAS release notes" in this same URL address.