학술논문
Gamma-Ray Burst Observations by the High-Energy Particle Detector on board the China Seismo-Electromagnetic Satellite between 2019 and 2021
Document Type
article
Author
F. Palma; M. Martucci; C. Neubüser; A. Sotgiu; F. M. Follega; P. Ubertini; A. Bazzano; J. C. Rodi; R. Ammendola; D. Badoni; S. Bartocci; R. Battiston; S. Beolè; I. Bertello; W. J. Burger; D. Campana; A. Cicone; P. Cipollone; S. Coli; L. Conti; A. Contin; M. Cristoforetti; G. D’Angelo; F. De Angelis; C. De Donato; C. De Santis; P. Diego; A. Di Luca; E. Fiorenza; G. Gebbia; R. Iuppa; A. Lega; M. Lolli; B. Martino; G. Masciantonio; M. Mergè; M. Mese; A. Morbidini; F. Nozzoli; F. Nuccilli; A. Oliva; G. Osteria; F. Palmonari; B. Panico; E. Papini; A. Parmentier; S. Perciballi; F. Perfetto; A. Perinelli; P. Picozza; M. Piersanti; M. Pozzato; G. Rebustini; D. Recchiuti; E. Ricci; M. Ricci; S. B. Ricciarini; A. Russi; Z. Sahnoun; U. Savino; V. Scotti; X. Shen; R. Sparvoli; S. Tofani; N. Vertolli; V. Vilona; V. Vitale; U. Zannoni; Z. Zeren; S. Zoffoli; P. Zuccon
Source
The Astrophysical Journal, Vol 960, Iss 1, p 21 (2023)
Subject
Language
English
ISSN
1538-4357
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 ∼507 km altitude and 97° 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 ∼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 ∼3 × 10 ^−5 erg cm ^−2 in the energy interval 300 keV–50 MeV, have been detected.