Author/Authors :
Williams، R. نويسنده , , McBreen، B. نويسنده , , Hanlon,، L. نويسنده , , Hurley، K. نويسنده , , Deluit، S. نويسنده , , Rau، A. نويسنده , , Roques، J.-P. نويسنده , , Schonfelder، V. نويسنده , , Beckmann، V. نويسنده , , Skinner، G. نويسنده , , Lichti، G. G. نويسنده , , Kienlin، A. von نويسنده , , Strong، A. نويسنده , , Connell، P. نويسنده , , Arend، N. نويسنده , , Bennett، K. نويسنده , , Kippen، M. نويسنده , , Moran، L. نويسنده , , Preece، R. نويسنده ,
Abstract :
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.
Keywords :
gamma-ray astronomy , gamma-ray bursts , SPI , GRB , INTEGRAL
