Search for GLAST gamma ray burst triggers due to particle precipitation in the South Atlantic Anomaly

Details Search for GLAST gamma ray burst triggers due to particle precipitation in the South Atlantic Anomaly Search for GLAST gamma ray burst triggers due to particle precipitation in the South Atlantic Anomaly

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvd..78h7102a&link_type=abstract

Physical Review D, vol. 78, Issue 8, id. 087102

Other

4

Cosmic Rays, Magnetic Anomalies, Modeling And Interpretations, Solar Radiation And Cosmic Ray Effects, Neutrino, Muon, Pion, And Other Elementary Particle Detectors, Cosmic Ray Detectors

Scientific paper

When GLAST is in the South Atlantic Anomaly (SAA), the rate of charged particles is too high to be efficiently filtered out. Moreover the high rate can cause saturation effects in the readout electronics and the sensors must be turned off. The SAA area relative to the total area of GLAST’s orbit is approximately 12.5% and GLAST spends 18% of the time in it. In spite of these cares, we show in this work that, due to drift processes, particle precipitation can still trigger GLAST when it is close to the SAA region. Here, we report two GLAST gamma ray burst monitor (GBM) triggers, trigger 239895229 and trigger 239913100, on August, 08, 2008 whose characteristics are similar to the ones observed in the Swift-BAT noise triggers (due to particle precipitation in the SAA region). Both GLAST triggers happened during a plentiful particle precipitation in the SAA region, observed by Tupi telescopes at the ground with their trigger coordinates close to the field of view of the telescopes. Details of these results are reported.

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