Frequency of fast, narrow gamma-ray bursts and burst classification

Technical Report · Sat Oct 01 00:00:00 EDT 1983

OSTI ID:6575934

Norris, J P; Cline, T L; Desai, U D; Teegarden, B J

Evidence from the Vela satellites that very brief, approximately 0.1 s, gamma-ray bursts constitute a class distinct from the longer, highly structured bursts has been strengthened by the results of the Venera 11 and 12 KKONUS experiments. The Goodard ISEE-3 gamma-ray burst spectrometer, utilizing a trigger criterion which is more likely to be independent of duration than previous experiments, detected a sample of events which enhances this bimodal distribution. The ISEE-3 result is corroborated by an increase in the frequency of detection of short bursts in the KONUS 13/14 database over KONUS 11/12, an effect attributable to the use of a shorter trigger integration time in the later experiments. Considerations such as repeating bursters complicate a simple dichotomous classification of gamma-ray bursts.

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 6575934
• Report Number(s): N-84-19190
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GAMMA BURSTS
COSMIC RADIATION
GAMMA SPECTRA
IONIZING RADIATIONS
MEASURING INSTRUMENTS
PRIMARY COSMIC RADIATION
RADIATIONS
SPACE VEHICLES
SPECTRA
SPECTROMETERS
VEHICLES
VENERA SPACE PROBES