Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..722s&link_type=abstract
Nature, vol. 294, Dec. 24-31, 1981, p. 722-724.
Astronomy and Astrophysics
Astronomy
122
Astronomical Models, Flare Stars, Gamma Ray Bursts, Gamma Ray Astronomy, Neutron Stars, Stellar Evolution, Stellar Mass Accretion, Thermonuclear Explosions
Scientific paper
Sixteen million seconds, or over a half year, of optical monitoring of three Gamma-ray burst positions using the Harvard College Observatory collection of archival plates are described. The probable optical counterpart of the November 19, 1978 Gamma-ray burster has been discovered on a blue emulsion plate exposed in 1928. Optical searches indicate that the absolute magnitude of the Gamma-ray burst system at quiescence is fainter than 13, and a recurrence rate of about 10 to the -7.5/sec is found from Gamma-ray and optical data. Such a high recurrence rate precludes any model which uses a collision between a neutron star and an asteroid-like body, as well as any model requiring accretion from the interstellar matter onto a neutron star.
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