INTEGRAL spectrometer SPI’s GRB detection capabilities : GRBs detected inside SPI’s FoV and with the anticoincidence system ACS
/ Authors
A. Kienlin, V. Beckmann, A. Rau, N. Arend, K. Bennett, B. Mcbreen, P. Connell, S. Deluit, L. Hanlon, K. Hurley
and 9 more authors
M. Kippen, G. Lichti, L. Moran, P. Preece, J. Roques, V. Schoenfelder, G. Skinner, A. Strong, R. Williams
/ Abstract
The spectrometer SPI, one of the two main instruments of the INTEGRAL spacecraft, oers 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 of0.8/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.
Journal: Astronomy and Astrophysics