RT Journal Article
T1 Teraelectronvolt emission from the γ-ray burst GRB 190114C
A1 Acciari, Victor
A1 Barrio Uña, Juan Abel
A1 González Barrio, Miguel Ángel
A1 Contreras González, José Luis
A1 Fonseca González, María Victoria
A1 López Moya, Marcos
A1 Morcuende Parrilla, Daniel
A1 Peñil Del Campo, Pablo
A1 Nava, Lara
AB Long-duration gamma-ray bursts (GRBs) are the most luminous sources of electromagnetic radiation known in the Universe. They arise from outflows of plasma with velocities near the speed of light that are ejected by newly formed neutron stars or black holes (of stellar mass) at cosmological distances(1,2). Prompt flashes of megaelectronvoltenergy gamma-rays are followed by a longer-lasting afterglow emission in a wide range of energies (from radio waves to gigaelectronvolt gamma-rays), which originates from synchrotron radiation generated by energetic electrons in the accompanying shock waves(3,4). Although emission of gamma-rays at even higher (teraelectronvolt) energies by other radiation mechanisms has been theoretically predicted(5-8), it has not been previously detected(7,8). Here we report observations of teraelectronvolt emission from the gamma-ray burst GRB 190114C. gamma-rays were observed in the energy range 0.2-1 teraelectronvolt from about one minute after the burst (at more than 50 standard deviations in the first 20 minutes), revealing a distinct emission component of the afterglow with power comparable to that of the synchrotron component. The observed similarity in the radiated power and temporal behaviour of the teraelectronvolt and X-ray bands points to processes such as inverse Compton upscattering as the mechanism of the teraelectronvolt emission(9-11). By contrast, processes such as synchrotron emission by ultrahigh-energy protons(10,12,13) are not favoured because of their low radiative efficiency. These results are anticipated to be a step towards a deeper understanding of the physics of GRBs and relativistic shock waves.
PB Nature Research
SN 0028-0836
SN 1476-4687
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/100636
UL https://hdl.handle.net/20.500.14352/100636
LA eng
NO Teraelectronvolt emission from the γ-ray burst GRB 190114C. Nature, 2019, vol. 575, no 7783, p. 455-458.
NO Artículo firmado por 179 autores  (MAGIC Collaboration)
DS Docta Complutense
RD 10 abr 2025