New limit on the rate-density of evaporating black holes

Details New limit on the rate-density of evaporating black holes New limit on the rate-density of evaporating black holes

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvl..71.2524a&link_type=abstract

Physical Review Letters, Volume 71, Issue 16, October 18, 1993, pp.2524-2527

Physics

33

Black Holes, Gamma-Ray, Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

Data taken with the CYGNUS detector between 1989 September and 1993 January have been used to search for 1 s bursts of ultrahigh-energy gamma rays from point sources at arbitrary locations in the northern sky. We find no evidence for such bursts. We set a theory-dependent upper limit on the rate-density of evaporating black holes of 8.5×105 pc-3 yr-1 at the 99% C.L. When the same emission spectrum is used to recalculate previous upper limits based on direct searches, this limit is the most restrictive by nearly 2 orders of magnitude.

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