Discovering new Galactic Accelerators with XMM-Newton

Very High Energy (VHE, >50 GeV) gamma rays provide a direct view of some of themost extreme environments in our Galaxy and are an excellent probe ofnonthermal astrophysical processes. Studies of the nonthermal Galactic sourcepopulation are essential to understand where and how the bulk of the cosmic raysare accelerated in our Galaxy. Fermi has recently produced the first uniformsurvey of the entire Galactic plane at >50GeV, detecting more than 25%unidentified, new, sources. We propose to observe with XMMNewton the 6spectrally harder and thus most extreme objects in the Fermi sample. The studyof these sources with XMMNewton will unveil new sites of particle accelerationand will allow us understand the physics behind VHE emitters. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]