Observation of Anomalous Electron Fluxes Induced by GRB221009A on CSES-01 Low-energy Charged Particle Detector

Abstract High-energy, long gamma-ray bursts (GRBs) can be generated by the core collapse of massive stars at end their lives. When they happen in close-by universe exceptionally bright, as seen from Earth case recent, giant, long-lasting GRB221009A. GRB221009A was produced a collapsing star with redshift 0.152: this event observed many space experiments, which also detected an extraordinary afterglow. The large fluence prompt emission about 0.013 erg cm −2 illuminated geographical region centered on India and including Europe Asia. We report paper observation sudden electron flux changes correlated measured HEPP-L charged particle detector board China Seismo-Electromagnetic Satellite, orbiting over time GRB event. structure closely matches very distinctive dependence photon associated main part around 13:20 UTC 2022 October 9. To test origin these signals, we set up simplified simulation one subdetector: results analysis suggest that signals are mostly due to electrons created within aluminum collimator surrounding silicon detector, providing real-time monitoring intense fluxes. discuss implications for existing forthcoming detectors low orbits.