Exploring supergiant shells in the west of the LMC

We propose nine EPIC observations of two supergiant shells (SGSs) in the west ofthe LMC, a region poorly explored in Xrays. SGSs are ideal targets to find thesupernova remnants and Xray binaries which are known to be missing from currentsamples. We will reveal and study the hot gas content of the SGSs and itsrelation with other phases of the interstellar medium. The Xray luminosity ofthe diffuse emission will be compared to the recent star formation rate (SFR),allowing to calibrate the known relation between diffuse Xray emission and SFRover an unprecedented dynamical range. Finally, an extended gammaray sourcecoincides with the surveyed regions. An Xray inventory of the targets willprovide insight into the origin of this high energy emission. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]