Search for Short Cosmic Gamma-Ray Bursts Using Data from the APEX and LILAS Experiments Onboard the PHOBOS-2 Interplanetary Spacecraft

Details Search for Short Cosmic Gamma-Ray Bursts Using Data from the APEX and LILAS Experiments Onboard the PHOBOS-2 Interplanetary Spacecraft Search for Short Cosmic Gamma-Ray Bursts Using Data from the APEX and LILAS Experiments Onboard the PHOBOS-2 Interplanetary Spacecraft

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004astl...30..435k&link_type=abstract

Astronomy Letters, vol. 30, p. 435-443 (2004)

Astronomy and Astrophysics

Astronomy

2

Scientific paper

A statistical analysis of the spectral and temporal parameters for 546 triggering events on the APEX gamma-ray detector onboard the Phobos-2 spacecraft has revealed a group of 28 events that are probably short cosmic gamma-ray bursts (GRBs). The distribution of the full group of 74 events of the APEX experiment in duration parameter is bimodal in shape, which is in good agreement with the bimodal shape of the BATSE GRB distribution. A search for the detected group of short events using data from the LILAS X-ray and soft gamma-ray detector onboard the same spacecraft has yielded no positive result. A comparison of the APEX and LILAS data has led us to conclude that the short GRBs have a significantly reduced soft gamma-ray flux at energies <100 keV relative to the power law dN/dE = CE-alpha with the average index alpha = 2.62.

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