An episode of ultrahigh energy radiation from the γ-ray source Geminga: GRAPES I observations at Ooty during 1984-1987

Details An episode of ultrahigh energy radiation from the γ-ray source Geminga: GRAPES I observations at Ooty during 1984-1987 An episode of ultrahigh energy radiation from the γ-ray source Geminga: GRAPES I observations at Ooty during 1984-1987

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvd..48.3463g&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 48, Issue 8, 15 October 1993, pp.3463-3466

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1

Gamma-Ray Sources, Gamma-Ray Bursts, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays, Pulsars, Cosmic Rays

Scientific paper

A study of showers arriving from the direction of the γ-ray source Geminga (1E0630+178) has shown evidence for emission of ultrahigh energy radiation during the one week interval October 10-16, 1986. 83 showers were observed in the source bin as against an expected background of 44.1. The probability of observing this excess based on Monte Carlo simulations is less than 10-4. The flux observed during this period (1.00+/-0.24)×10-11 cm-2 s-1 at energies >=1014 eV corresponds to a time-averaged luminosity of 6×1032 erg s-1.

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