Identification of GRLB candidates

Gammarayloud binary systems (GRLB) are Xray binaries which emit VHE gammarays . Only 4 such systems, have been detected as persistent or regularlyvariable TeV emitters. The source of the highenergy activity of these GRLBs isuncertain. For understanding the nature of GRLBs a larger number of similarobjects is required. Most of the variable and transient Galactic sources of GeVgammarays are expected to belong to the GRLB class. We produced a variabilitymap of GC plane at 300MeV 300GeV using more than 3years of FERMI data, thatallowed to identify 3 variable unidentified sources, that are candidates toGRLBs. We propose the 10ksec XMM observation of each of these sources todetermine the nature of these sources and to check whether these sources are GRLBs. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]