INTEGRAL Spectrometer SPI's GRB detection capabilities
- A. von Kienlin
- V. Beckmann
- A. Rau
- N. Arend
- K. Bennett
- B. McBreen
- P. Connell
- S. Deluit
- L. Hanlon
- K. Hurley
- M. Kippen
- G. G. Lichti
- L. Moran
- R. Preece
- J.-P. Roques
- V. Schönfelder
- G. Skinner
- A. Strong
- R. Williams
DOIAbstract
The spectrometer SPI, one of the two main instruments of the INTEGRAL spacecraft, offers significant gamma-ray burst detection capabilities. In its 35° (full width) field of view SPI is able to localise gamma-ray bursts at a mean rate of ~0.8/month. With its large anticoincidence shield of 512 kg of BGO crystals SPI is able to detect gamma-ray bursts quasi omni-directionally with a very high sensitivity. Burst alerts of the anticoincidence shield are distributed by the INTEGRAL Burst Alert System. In the first 8 months of the mission about 0.8/day gamma-ray burst candidates and 0.3/day gamma-ray burst positions were obtained with the anticoincidence shield by interplanetary network triangulations with other spacecrafts
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