Unveil the nature of ROSAT Swift-XRT Counterparts of Fermi 3FHL Unidentifid

We propose the observations of 3 sources detected in Third Fermi High EnergyCatalog(3FHL; E > 10GeV) that have an Xray counterpart inside the Fermi error reg ionbut are still unidentified.These sources, lying on the Galactic plane (BII <10 deg), could hide a new classof Galactic gammaray emitters. We ask to observe thesesources with XMMNewton for 60 ks in total ,nominal time, plus 40 % to avoid thebackground radiation problem (http://xmmtools.cosmos.esa.int/external xmm_user_support/documentation/AOpolicy/node34.html),in order to study the ene rgetic and morphology in the X rays, allowing us the identification of sites of extreme particle acceleration. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]