Mathematics – Logic
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1133..415m&link_type=abstract
GAMMA-RAY BURST: Sixth Huntsville Symposium. AIP Conference Proceedings, Volume 1133, pp. 415-417 (2009).
Mathematics
Logic
1
Gamma-Ray Sources, Gamma-Ray Bursts, Scintillation Detectors, Calorimeters
Scientific paper
In this paper the results of the first months of burst search on very short time scales with the Mini-Calorimeter (MCAL) on-board the AGILE mission are presented. MCAL is equipped with a flexible on-board trigger logic for autonomous GRB detection. In addition to standard trigger time windows, MCAL has been equipped with trigger capabilities on 16 ms, 1 ms and sub-millisecond time windows. Since June 2008 burst search on these short time scales has been enabled, resulting in an average rate of 4 triggers/orbit, compliant with telemetry budget. An on-ground rejection strategy is applied, allowing more sophisticated selection criteria than those allowed by the on-board trigger logic. Triggers due to instrumental effects or geophysical phenomena can be spotted due to their photon-by-photon pattern; what remains after this cleaning is an almost unexplored territory and could shed light on the origin of very short bursts. The trigger criteria, as well as the on-ground rejection strategy and the properties of the selected events will be described and discussed.
Antonelli Lucio Angelo
Argan Andrea
Barbiellini Guido
Boffelli F.
Bulgarelli Andrea
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