Extended emission from short gamma-ray bursts detected with SPI-ACS/INTEGRAL
P. Yu. MinaevSpace Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, RussiaA. PozanenkoSpace Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, RussiaВ. М. ЛозниковSpace Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia
2010en
ABI
Аннотация
The short duration (T 90 < 2 s) gamma-ray bursts (GRBs) detected in the SPI-ACS experiment onboard the INTEGRAL observatory are investigated. Averaged light curves have been constructed for various groups of events, including short GRBs and unidentified short events. Extended emission has been found in the averaged light curves of both short GRBs and unidentified short events. It is shown that the fraction of the short GRBs in the total number of SPI-ACS GRBs can range from 30 to 45%, which is considerably larger than has been thought previously.
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