EDP Sciences
Special letters issue on: first science with integral
Free access
Issue
A&A
Volume 411, Number 1, November III 2003
Special letters issue on: first science with integral
Page(s) L299 - L305
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20031231


A&A 411, L299-L305 (2003)
DOI: 10.1051/0004-6361:20031231

Letter

INTEGRAL Spectrometer SPI's GRB detection capabilities

GRBs detected inside SPI's FoV and with the anticoincidence system ACS
A. von Kienlin1, V. Beckmann2, 3, A. Rau1, N. Arend1, K. Bennett4, B. McBreen5, P. Connell6, S. Deluit3, L. Hanlon5, K. Hurley7, M. Kippen8, G. G. Lichti1, L. Moran5, R. Preece9, J.-P. Roques10, V. Schönfelder1, G. Skinner10, A. Strong1 and R. Williams4

1  Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany,
2  Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
3  INTEGRAL Science Data Centre, Chemin d'Écogia 16, 1290 Versoix, Switzerland
4  Science Operations and Data Systems Division of ESA/ESTEC, SCI-SDG, Keplerlaan 1, Postbox 299, 2200 AG Noordwijk, The Netherlands
5  Department of Experimental Physics, University College Dublin, Stillorgan Road, Dublin 4, Ireland
6  Space Research Group, Univ. of Birmingham B15 2TT, Birmingham, UK
7  UC Berkeley Space Sciences Laboratory, Berkeley, CA 94720-7450, USA
8  Space and Remote Sensing Sciences, NIS-2 Mail Stop D436, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
9  Dept. of Physics, UAH, National Space Science & Technology Center, Huntsville, AL 35805, USA
10  Centre d'Études Spatiales des Rayonnements, 9 avenue du Colonel Roche, 31028 Toulouse, France,

(Received 16 July 2003 / Accepted 8 August 2003)

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.


Key words: gamma-ray bursts -- GRB -- gamma-ray astronomy -- INTEGRAL -- SPI



Offprint request: A. von Kienlin, azk@mpe.mpg.de

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