A search for high energy gamma-ray bursts from primordial black holes or other astronomical objects

Details A search for high energy gamma-ray bursts from primordial black holes or other astronomical objects A search for high energy gamma-ray bursts from primordial black holes or other astronomical objects

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.183..205p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 183, Apr. 1978, p. 205-210. Research supported by the Smithsonian Resea

Astronomy and Astrophysics

Astronomy

14

Black Holes (Astronomy), Galactic Radiation, Gamma Rays, Nuclear Explosion Effect, Astronomical Models, Bursts, High Energy Interactions

Scientific paper

Two systems of separated atmospheric Cerenkov detectors have been used to search for bursts of high-energy gamma rays which have been predicted theoretically from primordial black holes of about 10 to the 15th power g in mass. In one experiment four 1.5-m reflectors were used with maximum separation of 2.5 km. In another, two reflectors, each 70-80 sq cm in area and separated by 400 km, were used in coincidence. Detection sensitivities for the latter were about 10 to the -10th power erg/sq cm for bursts of less than 1 microsec in duration and gamma-ray energies greater than 200 MeV. Using the Hagedorn (1965) nuclear model, an upper limit of 0.04 event/cu pc per yr is set for the rate of black-hole explosions in the Galaxy. Information can also be obtained on bursts of longer duration, which may occur if other nuclear models hold. The upper limits found are considerably larger than that for the Hagedorn model.

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