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Battiston, R.; Neubüser, C.; Follega, F. M.; Iuppa, R.; Vitale, V.; Ammendola, R.; Badoni, D.; Bartocci, S.; Bazzano, A.; Beolè, S.; Bertello, I.; Burger, W. J.; Campana, D.; Cicone, A.; Cipollone, P.; Coli, S.; Conti, L.; Contin, A.; Cristoforetti, M.; D’Angelo, G.; De Angelis, F.; De Donato, C.; De Santis, C.; Diego, P.; Di Luca, A.; Fiorenza, E.; Gebbia, G.; Lega, A.; Lolli, M.; Martino, B.; Martucci, M.; Masciantonio, G.; Mergè, M.; Mese, M.; Morbidini, A.; Nuccilli, F.; Nozzoli, F.; Oliva, A.; Osteria, G.; Papini, E.; Palma, F.; Palmonari, F.; Parmentier, A.; Panico, B.; Perciballi, S.; Perfetto, F.; Perinelli, A.; Picozza, P.; Piersanti, M.; Pozzato, M.; Rebustini, G.; Recchiuti, D.; Ricci, E.; Ricci, M.; Rodi, J.; Russi, A.; Ricciarini, S. B.; Sahnoun, Z.; Savino, U.; Scotti, V.; Shen, X.; Sotgiu, A.; Sparvoli, R.; Tofani, S.; Ubertini, P.; Vertolli, N.; Vilona, V.; Zannoni, U.; Zeren, Z.; Zoffoli, S.; Zuccon, P.
Astrophysical journal. Letters, 03/2023, Letnik: 946, Številka: 1Journal Article
Abstract High-energy, long gamma-ray bursts (GRBs) can be generated by the core collapse of massive stars at the end of their lives. When they happen in the close-by universe they can be exceptionally bright, as seen from the Earth in the case of the recent, giant, long-lasting GRB221009A. GRB221009A was produced by a collapsing star with a redshift of 0.152: this event was observed by many gamma-ray space experiments, which also detected an extraordinary long gamma-ray afterglow. The exceptionally large fluence of the prompt emission of about 0.013 erg cm −2 illuminated a large geographical region centered on India and including Europe and Asia. We report in this paper the observation of sudden electron flux changes correlated with GRB221009A and measured by the HEPP-L charged particle detector on board the China Seismo-Electromagnetic Satellite, which was orbiting over Europe at the time of the GRB event. The time structure of the observed electron flux closely matches the very distinctive time dependence of the photon flux associated with the main part of the emission at around 13:20 UTC on 2022 October 9. To test the origin of these signals, we set up a simplified simulation of one HEPP-L subdetector: the results of this analysis suggest that the signals observed are mostly due to electrons created within the aluminum collimator surrounding the silicon detector, providing real-time monitoring of the very intense photon fluxes. We discuss the implications of this observation for existing and forthcoming particle detectors on low Earth orbits.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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