OSSE Observations of the Vela Pulsar
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
The OSSE detector on board the Compton Gamma Ray Observatory observed the Vela Pulsar PSR 0833-45 during August-September 1991 and April-May 1992. Pulsed emission was detected at the 4-5 sigma level in the 0.06-0.57 MeV band in the sum of the two observing periods, as well as in each individual observation at lower significance. There is no significant variability observed. Light curves have a peak structure similar to that observed at higher energies. The spectrum is hard at lower energies and appears to require a break in the 0.5-2 MeV region.