Ultrahigh-energy pulsed emission from Hercules X-1 with anomalous air-shower muon production

Details Ultrahigh-energy pulsed emission from Hercules X-1 with anomalous air-shower muon production Ultrahigh-energy pulsed emission from Hercules X-1 with anomalous air-shower muon production

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..61.1906d&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 61, Oct. 24, 1988, p. 1906-1909. DOE-NSF-supported research.

Statistics

Computation

86

Gamma Ray Bursts, Hercules Nova, Muons, X Ray Sources, Computational Astrophysics, Cosmic Ray Showers, Periodic Variations, Pulsars, Pulsed Radiation, Radiation Distribution

Scientific paper

A search for bursts of air-shower events from Hercules X-1 at energies above 50 TeV during the calendar period 2 April 1986 to 5 July 1987 yielded two significant bursts, both occurring on UT 24 July 1986. The events during these bursts were pulsed with a period of 1.23568 s, significantly different from estimates of the contemporaneous X-ray period. The probability that this represent random statistical fluctuations of the background is estimated to be 2×10-5. The muon content of the burst events is anomalous when compared with expectations from γ-ray showers.

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