Mapping the Stellar X-ray Emission beyond 1 Gyr in Space and Time

Observations of old open clusters (12 Gyr) have been performed with ROSAT butwith limited sensitivity and spatial resolution and allowed to investigate theevolution only of very active binaries. At the moment the coronalactivity agerelation beyond 1 Gyr for single stars is defined almost only by the Sun. XMMwill give the opportunity to study the Xray emission in solar type stars inclusters older than 1 Gyr. Emission by hot luminous white dwarfs, as the onedetected in M67 but also much weaker, can also be measured in these clusters.The discovery of WDs with well know age is of extremely importance to studystellar evolution beyond the giant phase. To reach these goals we propose toobserve with XMM the intermediateage open cluster NGC2527. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]