Proprietary XMM-Newton data is available for download via your XSA account. Email instructions from the XMM-SOC at Vilspa are sent to the address on record with detailed directions on how to retrieve your data via the XSA.
XMM-Newton data is available for download at the HEASARC data archive. The data files can be considered to come in two groups in separate subdirectories when retrieved, the Observation Data Files (ODF) files and Pipeline Processing (PPS) files. The ODF data contain all of the observation-specific data necessary for reprocessing the observation. The PPS data contain, among other things, calibrated photon event files and source lists.