NASA NTRS · 19850025620
500 TeV gamma rays from Hercules X-1
Abstract
A signal (chance probability = .0002) with the 1.24 s period of Hercules X-1 has been observed using the Utah Fly's Eye. The signal's relatively long period and high shower energy conflict with some popular models of particle acceleration by pulsars. Optical and X-ray data suggest a picture in which energetic particles produce multi-TeV gamma rays by collisions with Hercules X-1's accretion disk.
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Baltrusaitis, R. M., Cassiday, G. L., Copper, R., Elbert, J. W., Gerhardy, P. R., Loh, E. C., Mizumoto, Y., Sokolsky, P., Sommers, P., Steck, D.. 1985-08-01. 500 TeV gamma rays from Hercules X-1. https://ntrs.nasa.gov/citations/19850025620
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