Completing the X-ray legacy image of the supernova remnant RCW 86

We propose to observe the southeastern and northwestern part of RCW 86, thuscompleting the XMMNewton legacy map of the remnant of SN 185. The SE region,our prime target, shows, among others, the onset of arcs of both thermal andsynchrotron emission that we want to study in detail. This is needed todetermine the morphology and the total Xray synchrotron flux of RCW 86, which,combined with HESS and Fermi observations, is important to reveal the nature ofthe accelerated particles in this remnant. The thermal emission will be used todetermine the plasma conditions and abundances, which are needed to shed lighton the nature of the progenitor (corecollapse or Type Ia?) and the history ofthe interaction of the remnant with the circumstellar medium. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]