Science, Vol.361, No.6398, 147-+, 2018
Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
Aartsen MG ,
Ackermann M ,
Adams J ,
Aguilar JA ,
Ahlers M ,
Ahrens M ,
Al Samarai I ,
Altmann D ,
Andeen K ,
Anderson T ,
Ansseau I ,
Anton G ,
Arguelles C ,
Arsioli B ,
Auffenberg J ,
Axani S ,
Bagherpour H ,
Bai X ,
Barron JP ,
Barwick SW ,
Baum V ,
Bay R ,
Beatty JJ ,
Tjus JB ,
Becker KH ,
Ben Zvi S ,
Berley D ,
Bernardini E ,
Besson DZ ,
Binder G ,
Bindig D ,
Blaufuss E ,
Blot S ,
Bohm C ,
Borner M ,
Bos F ,
Boser S ,
Botner O ,
Bourbeau E ,
Bourbeau J ,
Bradascio F ,
Braun J ,
Brenzke M ,
Bretz HP ,
Bron S ,
Brostean-Kaiser J ,
Burgman A ,
Busse RS ,
Carver T ,
Cheung E ,
Chirkin D ,
Christov A ,
Clark K ,
Classen L ,
Coenders S ,
Collin GH ,
Conrad JM ,
Coppin P ,
Correa P ,
Cowen DF ,
Cross R ,
Dave P ,
Day M ,
de Andre JPAM ,
De Clercq C ,
DeLaunay JJ ,
Dembinski H ,
De Ridder S ,
Desiati P ,
de Vries KD ,
de Wasseige G ,
de With M ,
De Young T ,
Diaz-Velez JC ,
di Lorenzo V ,
Dujmovic H ,
Dumm JP ,
Dunkman M ,
Dvorak E ,
Eberhardt B ,
Ehrhardt T ,
Eichmann B ,
Eller P ,
Evenson PA ,
Fahey S ,
Fazely AR ,
Felde J ,
Filimonov K ,
Finley C ,
Flis S ,
Franckowiak A ,
Friedman E ,
Fritz A ,
Gaisser TK ,
Gallagher J ,
Gerhardt L ,
Ghorbani K ,
Giommi P ,
Glauch T ,
Glusenkamp T ,
Goldschmidt A ,
Gonzalez JG ,
Grant D ,
Griffith Z ,
Haack C ,
Hallgren A ,
Halzen F ,
Hanson K ,
Hebecker D ,
Heereman D ,
Helbing K ,
Hellauer R ,
Hickford S ,
Hignight J ,
Hill GC ,
Hoffman KD ,
Hoffmann R ,
Hoinka T ,
Hokanson-Fasig B ,
Hoshina K ,
Huang F ,
Huber M ,
Hultqvist K ,
Hunnefeld M ,
Hussain R ,
In S ,
Iovine N ,
Ishihara A ,
Jacobi E ,
Japaridze GS ,
Jeong M ,
Jero K ,
Jones BJP ,
Kalaczynski P ,
Kang W ,
Kappes A ,
Kappesser D ,
Karg T ,
Karle A ,
Katz U ,
Kauer M ,
Keivani A ,
Kelley JL ,
Kheirandish A ,
Kim J ,
Kim M ,
Kintscher T ,
Kiryluk J ,
Kittler T ,
Klein SR ,
Koirala R ,
Kolanoski H ,
Kopke L ,
Kopper C ,
Kopper S ,
Koschinsky JP ,
Koskinen DJ ,
Kowalski M ,
Krammer B ,
Krings K ,
Kroll M ,
Kruckl G ,
Kunwar S ,
Kurahashi N ,
Kuwabara T ,
Kyriacou A ,
Labare M ,
Lanfranchi JL ,
Larson MJ ,
Lauber F ,
Leonard K ,
Lesiak-Bzdak M ,
Leuermann M ,
Liu QR ,
Mariscal CJL ,
Lu L ,
Lunemann J ,
Luszczak W ,
Madsen J ,
Maggi G ,
Mahn KBM ,
Mancina S ,
Maruyama R ,
Mase K ,
Maunu R ,
Meagher K ,
Medici M ,
Meier M ,
Menne T ,
Merino G ,
Meures T ,
Miarecki S ,
Micallef J ,
Momente G ,
Montaruli T ,
Moore RW ,
Morse R ,
Moulai M ,
Nahnhauer R ,
Nakarmi P ,
Naumann U ,
Neer G ,
Niederhausen H ,
Nowicki SC ,
Nygren DR ,
Pollmann AO ,
Olivas A ,
O'Murchadha A ,
O'Sullivan E ,
Padovani P ,
Palczewski T ,
Pandya H ,
Pankova DV ,
Peiffer P ,
Pepper JA ,
de los Heros CP ,
Pieloth D ,
Pinat E ,
Plum M ,
Price PB ,
Przybylski GT ,
Raab C ,
Radel L ,
Rameez M ,
Rawlins K ,
Rea IC ,
Reimann R ,
Relethford B ,
Relich M ,
Resconi E ,
Rhode W ,
Richman M ,
Robertson S ,
Rongen M ,
Rott C ,
Ruhe T ,
Ryckbosch D ,
Rysewyk D ,
Safa I ,
Sahakyan N ,
Salzer T ,
Herrera SES ,
Sandrock A ,
Sandroos J ,
Santander M ,
Sarkar S ,
Sarkar S ,
Satalecka K ,
Schlunder P ,
Schmidt T ,
Schneider A ,
Schoenen S ,
Schoneberg S ,
Schumacher L ,
Sclafani S ,
Seckel D ,
Seunarine S ,
Soedingrekso J ,
Soldin D ,
Song M ,
Spiczak GM ,
Spiering C ,
Stachurska J ,
Stamatikos M ,
Stanev T ,
Stasik A ,
Stettner J ,
Steuer A ,
Stezelberger T ,
Stokstad RG ,
Stossl A ,
Strotjohann NL ,
Stuttard T ,
Sullivan GW ,
Sutherland M ,
Taboada I ,
Tatar J ,
Tenholt F ,
Ter-Antonyan S ,
Terliuk A ,
Tilav S ,
Toale PA ,
Tobin MN ,
Toennis C ,
Toscano S ,
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Tung CF ,
Turcati A ,
Turley CF ,
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Unger E ,
Usner M ,
Vandenbroucke J ,
Van Driessche W ,
van Eijk D ,
van Eijndhoven N ,
Vanheule S ,
van Santen J ,
Vogel E ,
Vraeghe M ,
Walck C ,
Wallace A ,
Wallraff M ,
Wandler FD ,
Wandkowsky N ,
Waza A ,
Weaver C ,
Weiss MJ ,
Wendt C ,
Werthebach J ,
Westerhoff S ,
Whelan BJ ,
Whitehorn N ,
Wiebe K ,
Wiebusch CH ,
Wille L ,
Williams DR ,
Wills L ,
Wolf M ,
Wood J ,
Wood TR ,
Woschnagg K ,
Xu DL ,
Xu XW ,
Xu Y ,
Yanez JP ,
Yodh G ,
Yoshida S ,
Yuan T
A high-energy neutrino event detected by IceCube on 22 September 2017 was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056. Prompted by this association, we investigated 9.5 years of IceCube neutrino observations to search for excess emission at the position of the blazar. We found an excess of high-energy neutrino events, with respect to atmospheric backgrounds, at that position between September 2014 and March 2015. Allowing for time-variable flux, this constitutes 3.5 sigma evidence for neutrino emission from the direction of TXS 0506+056, independent of and prior to the 2017 flaring episode. This suggests that blazars are identifiable sources of the high-energy astrophysical neutrino flux.
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