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      Search for Astronomical Neutrinos from Blazar TXS 0506+056 in Super-Kamiokande

      , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The Super-Kamiokande Collaboration

      The Astrophysical Journal

      American Astronomical Society

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          Measurement of atmospheric neutrino oscillation parameters by Super-Kamiokande I

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            Ultrahigh-energy neutrino interactions

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              Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A

                (2018)
              Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neutrinos remain unidentified. On 22 September 2017, we detected a high-energy neutrino, IceCube-170922A, with an energy of ~290 tera-electron volts. Its arrival direction was consistent with the location of a known γ-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to γ-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy γ-rays. This observation of a neutrino in spatial coincidence with a γ-ray-emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.
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                Author and article information

                Journal
                The Astrophysical Journal
                ApJ
                American Astronomical Society
                2041-8213
                December 10 2019
                December 04 2019
                : 887
                : 1
                : L6
                Article
                10.3847/2041-8213/ab5863
                © 2019

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