A multi-wavelength investigation of candidate milli-second pulsars in unassociated $\gamma$-ray sources

D. Salvetti, R. P. Mignani, A. De Luca +7

About one third of the 3033 $\gamma$-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and do not have even a tentative association with a known obje…