Search for ultra-high-energy radiation from {gamma}-ray bursts
Using data from the CYGNUS extensive air shower array, we have searched for evidence of emission of ultra-high-energy radiation coincident with {gamma}-ray bursts observed by the BATSE instrument on the Compton Gamma-Ray Observatory. No statistically significant excess was found for any point in the sky within 4{sigma} of BATSE`s best location coordinates for any of the 56 bursts examined. Furthermore, no events were seen in the 2.2{degree} radius circular bin surrounding {gamma}-ray burst GRB 920720, whose location was determined accurately by the Compton/Ulysses/PVO Interplanetary Network of satellites. Flux upper limits depend greatly on the actual zenith angle of the burst. Typical fluence upper limits above 100 TeV are {approximately}10{sup {minus}6} erg cm{sup {minus}2}. The fluence upper limits for GRB 920720 is 2 {times} 10{sup {minus}6} erg cm{sup {minus}2}.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10157302
- Report Number(s):
- LA-UR-93-1604; CONF-930779-10; ON: DE93012721
- Resource Relation:
- Journal Volume: 307; Conference: International cosmic-ray conference,Calgary (Canada),19-20 Jul 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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