Before launch of Fermi, pulsars were almost the exclusive domain of radio astronomy. However, since June 2008, the LAT onboard the Fermi satellite Nearby energetic pulsars. A large fraction of g ray pulsars are radio quiet 117 detections in three years of LAT survey (2 nd fermi lat catalogue of gamma ray pulsars) radio follow up: provides constraints on the relative beaming fractions
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