A GRB Detection System using the BGO-Shield of the INTEGRAL-Spectrometer SPI

Abstract

The anticoincidence shield (ACS) of the INTEGRAL-spectrometer SPI consists of 512 kg of BGO crystals. This massive scintillator allows the measurement of gamma-ray bursts (GRBs) with a very high sensitivity. Estimations have shown that with the ACS some hundred gamma-ray bursts per year on the 5 sigma level can be detected, having an equivalent sensitivity to BATSE. The GRB detection will be part of the real-time INTEGRAL burst-alert system (IBAS). The ACS branch of IBAS will produce burst alerts and light curves with 50 ms resolution. It is planned to use ACS burst alerts in the 4th interplanetary network (IPN).

4 pages including 2 figures; to appear in the proceedings of the 2nd Rome Workshop on Gamma-Ray Burst in the Afterglow Era, Rome/Italy, October 7-20, 2000 (Springer)

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• Integral results on GRB030320: a long gamma-ray burst detected at the edge of the field of view
• Exploring the MeV Sky with a Combined Coded Mask and Compton Telescope: The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO)
• Gamma-Ray Burst Detection with INTEGRAL/SPI
• Calibration of the INTEGRAL SPI Anti Coincidence Shield with Gamma Ray Bursts observations
• Search for gamma-ray emission from a galactic supernova with the anticoincidence system of SPI