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oai:docta.ucm.es:20.500.14352/1009482025-04-30T23:48:58Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Domínguez Díaz, Alberto author Barrio Uña, Juan Abel author Contreras González, José Luis author Fonseca González, María Victoria author López Moya, Marcos author Nievas Rosillo, Mireia author Fidalgo, David author Sivakoff, Gregory author 2018 Neutrino emission from a flaring blazar Neutrinos interact only very weakly with matter, but giant detectors have succeeded in detecting small numbers of astrophysical neutrinos. Aside from a diffuse background, only two individual sources have been identified: the Sun and a nearby supernova in 1987. A multiteam collaboration detected a high-energy neutrino event whose arrival direction was consistent with a known blazar—a type of quasar with a relativistic jet oriented directly along our line of sight. The blazar, TXS 0506+056, was found to be undergoing a gamma-ray flare, prompting an extensive multiwavelength campaign. Motivated by this discovery, the IceCube collaboration examined lower-energy neutrinos detected over the previous several years, finding an excess emission at the location of the blazar. Thus, blazars are a source of astrophysical neutrinos. IceCube Collaboration, MAGIC, AGILE, ASAS-SN, HAWC, HESS, ... & Kappesser, D. (2018). Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A. Science, 361(6398), eaat1378. 0036-8075 10.1126/science.aat1378 https://hdl.handle.net/20.500.14352/100948 1095-9203 https://doi.org/10.1126/science.aat1378 Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A