Possible EGRET Gamma-Ray Burst Detection Independent of BATSE Triggering

Details Possible EGRET Gamma-Ray Burst Detection Independent of BATSE Triggering Possible EGRET Gamma-Ray Burst Detection Independent of BATSE Triggering

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463..565j&link_type=abstract

Astrophysical Journal v.463, p.565

Astronomy and Astrophysics

Astronomy

8

Gamma Rays: Bursts, Methods: Statistical

Scientific paper

EGRET spark chamber data collected between 1991 April 22 and 1994 August 29 have been analyzed for gamma-ray burst events independent of BATSE triggering. To date; five gamma-ray bursts that are coincident with a trigger from the BATSE instrument have been detected in the EGRET spark chamber. The EGRET-detected bursts have high-energy power-law tails and, in some cases, long duration emission. Because BATSE is sensitive in a lower energy range (25-600 keV), there may be other high energy gamma-ray bursts detectable with EGRET (30 MeV-30 GeV) that do not trigger BATSE. Also, bursts with long-duration emission may be more easily detected. with EGRET. Furthermore, burst events may have occurred while BATSE was temporarily inactive. Two previously detected gamma-ray bursts were independently detected, and one new possible detection was made on a timescale of 3 minutes, although the significance is subject to systematic errors.

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