COMPTEL detection of two spatially-coincident γ-ray bursts.

Details COMPTEL detection of two spatially-coincident γ-ray bursts. COMPTEL detection of two spatially-coincident γ-ray bursts.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...293l...5k&link_type=abstract

Astronomy and Astrophysics 293L, p.L5 (1995)

Astronomy and Astrophysics

Astrophysics

13

Gamma-Ray Bursts

Scientific paper

During nearly three years of operation, the COMPTEL instrument on the Compton Gamma Ray Oservatory has localized 17 cosmic γ-ray bursts in the energy range 0.75-30MeV with average localization accuracy ~1.3deg. We report here the COMPTEL detection of two bursts (GRB 930704 and GRB 940301), occurring eight months apart, which are consistent with the same, well-defined location within 1σ uncertainties. Through Monte Carlo simulation, we show that the probability of this spatial coincidence being random is ~3%. Interplanetary Network (IPN) localization of these events cannot rule out the possibility that they originate from a single source. Furthermore, when COMPTEL and IPN localizations are combined, we show that the random probability of two such overlapping bursts reduces to ~1.5%. We discuss implications of this evidence of a possible repeating burst source.

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