In this paper we report the detection of five strong gamma-ray bursts (GRBs) by the High-Energy Particle Detector (HEPD-01) mounted on board the China Seismo-Electromagnetic Satellite, operational since 2018 on a Sun-synchronous polar orbit at a similar to 507 km altitude and 97 degrees inclination. HEPD-01 was designed to detect high-energy electrons in the energy range 3-100 MeV, protons in the range 30-300 MeV, and light nuclei in the range 30-300 MeV n(-1). Nonetheless, Monte Carlo simulations have shown HEPD-01 is sensitive to gamma-ray photons in the energy range 300 keV-50 MeV, even if with a moderate effective area above similar to 5 MeV. A dedicated time correlation analysis between GRBs reported in literature and signals from a set of HEPD-01 trigger configuration masks has confirmed the anticipated detector sensitivity to high-energy photons. A comparison between the simultaneous time profiles of HEPD-01 electron fluxes and photons from GRB190114C, GRB190305A, GRB190928A, GRB200826B, and GRB211211A has shown a remarkable similarity, in spite of the different energy ranges. The high-energy response, with peak sensitivity at about 2 MeV, and moderate effective area of the detector in the actual flight configuration explain why these five GRBs, characterized by a fluence above similar to 3 x 10(-5) erg cm(-2) in the energy interval 300 keV-50 MeV, have been detected.

Palma, F., Martucci, M., Neubüser, C., Sotgiu, A., Follega, F.M., Ubertini, P., et al. (2024). Gamma-Ray Burst Observations by the High-Energy Particle Detector on board the China Seismo-Electromagnetic Satellite between 2019 and 2021. THE ASTROPHYSICAL JOURNAL, 960(1), 1-8 [10.3847/1538-4357/ad06ae].

Gamma-Ray Burst Observations by the High-Energy Particle Detector on board the China Seismo-Electromagnetic Satellite between 2019 and 2021

Martucci, M.;Sotgiu, A.;Bartocci, S.;Coli, S.;Contin, A.;Palmonari, F.;Papini, E.;Perfetto, F.;Pozzato, M.;
2024

Abstract

In this paper we report the detection of five strong gamma-ray bursts (GRBs) by the High-Energy Particle Detector (HEPD-01) mounted on board the China Seismo-Electromagnetic Satellite, operational since 2018 on a Sun-synchronous polar orbit at a similar to 507 km altitude and 97 degrees inclination. HEPD-01 was designed to detect high-energy electrons in the energy range 3-100 MeV, protons in the range 30-300 MeV, and light nuclei in the range 30-300 MeV n(-1). Nonetheless, Monte Carlo simulations have shown HEPD-01 is sensitive to gamma-ray photons in the energy range 300 keV-50 MeV, even if with a moderate effective area above similar to 5 MeV. A dedicated time correlation analysis between GRBs reported in literature and signals from a set of HEPD-01 trigger configuration masks has confirmed the anticipated detector sensitivity to high-energy photons. A comparison between the simultaneous time profiles of HEPD-01 electron fluxes and photons from GRB190114C, GRB190305A, GRB190928A, GRB200826B, and GRB211211A has shown a remarkable similarity, in spite of the different energy ranges. The high-energy response, with peak sensitivity at about 2 MeV, and moderate effective area of the detector in the actual flight configuration explain why these five GRBs, characterized by a fluence above similar to 3 x 10(-5) erg cm(-2) in the energy interval 300 keV-50 MeV, have been detected.
2024
Palma, F., Martucci, M., Neubüser, C., Sotgiu, A., Follega, F.M., Ubertini, P., et al. (2024). Gamma-Ray Burst Observations by the High-Energy Particle Detector on board the China Seismo-Electromagnetic Satellite between 2019 and 2021. THE ASTROPHYSICAL JOURNAL, 960(1), 1-8 [10.3847/1538-4357/ad06ae].
Palma, F.; Martucci, M.; Neubüser, C.; Sotgiu, A.; Follega, F. M.; Ubertini, P.; Bazzano, A.; Rodi, J. C.; Ammendola, R.; Badoni, D.; Bartocci, S.; Ba...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/962109
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