Pulsed gamma-rays from PSR 1951 + 32

Abstract

In a previous paper [1] we obtained statistically significant evidence for a 39-ms period in the COS-B data of 30-5000 MeV gamma rays in the direction of PSR 1951 + 32. Most of the gamma photons from PSR 1951 + 32 are pulsed and concentrated in a narrow interval of phase. We have examined the partical distribution of gamma ray intensity in the region around the pulsar and estimated the integrated flux to be 4.1 × 10 ^-7 ph cm ^-2s ^-1 above 100 MeV and 8.2 × 10 ^-8 ph cm ^-2s ^-1 above 300 MeV.