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

IceCube collaboration,; Fermi-LAT collaboration,; MAGIC collaboration,; AGILE,; ASAS-SN,; HAWC,; S, H. E. S.; INTEGRAL,; Kanata,; Kiso,; Kapteyn,; telescope, Liverpool; Subaru,; Swift/NuSTAR,; VERITAS,; VLA/17B-403,

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

MPS-Authors

IceCube collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Fermi-LAT collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

MAGIC collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

AGILE,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

ASAS-SN,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

HAWC,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

S, H. E. S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

INTEGRAL,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kanata,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kiso,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kapteyn,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

telescope, Liverpool
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Subaru,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Swift/NuSTAR,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

VERITAS,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

VLA/17B-403,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

IceCube collaboration, Fermi-LAT collaboration, MAGIC collaboration, AGILE, ASAS-SN, HAWC, et al. (2018). Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A. Science Magazine, (361), 1378. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-385.

Cite as: https://hdl.handle.net/21.11116/0000-0003-F897-B

Abstract

Individual astrophysical sources previously detected in 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 approximately 290 TeV. Its arrival direction was consistent with the location of a known gamma-ray blazar TXS 0506+056, observed to be in a flaring state. An extensive multi-wavelength campaign followed, ranging from radio frequencies to gamma-rays. These observations characterize the variability and energetics of the blazar and include the first detection of TXS 0506+056 in very-high-energy gamma-rays. This observation of a neutrino in spatial coincidence with a gamma-ray emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.