Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.5508c&link_type=abstract
American Astronomical Society, 182nd AAS Meeting, #55.08; Bulletin of the American Astronomical Society, Vol. 25, p.894
Astronomy and Astrophysics
Astronomy
Scientific paper
Data taken with the CYGNUS detector between 1989 and 1993 have been used to search for 1 second bursts of ultra-high energy (UHE) gamma rays from any point in the northern sky. There is no evidence for such bursts. Therefore the theory-dependent upper limit on the rate-density of evaporating black holes is 6.1times 10(5) pc(-3}yr({-1)) at the 99% C.L.. After renormalizing previous direct searches to the same theory, this limit is the most restrictive by more than 2 orders of magnitude.
Alexandreas D. E.
Allen Glenn E.
Berley D.
Biller Steve
Burman R. L.
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