XMM-Newton is an X-ray space observatory launched by the European Space Agency in December 1999 on an Ariane 5 rocket. It is used to study sources of soft X-rays such as the formation of stars in stellar nurseries, clusters of galaxies, supermassive black holes in the hearts of galaxies as well as the other mysteries of space. On this website you will find information about XMM-Newton, the work done by the XMM-Newton Survey Science Centre which provides the XMM-Newton data and analysis software, as well as some of the discoveries made with this observatory.

News ! The latest version of the 4XMM catalogue, 4XMM-DR12 has been released on 28th July 2022. This version contains 939 270 X-ray detections making it the biggest X-ray catalogue from a single X-ray observatory! For detailed information about the catalogue see: 4XMM-DR12 catalogue