NASA NTRS · 19730056958
Pulsed high-energy gamma rays from the Crab Nebula.
Abstract
Review of recorded data on the pulsed radiation detected by the Cornell 100-inch gas-Cerenkov gamma-ray telescope within 1 degree of the Crab Nebula in direction, at hundreds of MeV up to more than 1 GeV, coincident in time with optical pulses from NP 0532. A main pulse and a secondary pulse are shown to contain about an equal number of events and display evidence of being narrower than at lower energies. There is weak evidence for further pulse structure in the interval between these two peaks, and also for an unmodulated gamma-ray component about equal to the time-averaged pulsed flux.
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Mcbreen, B., Ball, S. E., Jr., Campbell, M., Greisen, K., Koch, D.. 1973-09-01. Pulsed high-energy gamma rays from the Crab Nebula.. https://ntrs.nasa.gov/citations/19730056958
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