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Multiwavelength follow-up of a rare IceCube neutrino multiplet

  • Author(s): 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
  • Archinger, M
  • Argüelles, C
  • Auffenberg, J
  • Axani, S
  • Bai, X
  • Barwick, SW
  • Baum, V
  • Bay, R
  • Beatty, JJ
  • Tjus, JB
  • Becker, KH
  • Benzvi, S
  • Berley, D
  • Bernardini, E
  • Bernhard, A
  • Besson, DZ
  • Binder, G
  • Bindig, D
  • Blaufuss, E
  • Blot, S
  • Bohm, C
  • Börner, M
  • Bos, F
  • Bose, D
  • Böser, S
  • Botner, O
  • Braun, J
  • Brayeur, L
  • Bretz, HP
  • Bron, S
  • Burgman, A
  • Carver, T
  • Casier, M
  • Cheung, E
  • Chirkin, D
  • Christov, A
  • Clark, K
  • Classen, L
  • Coenders, S
  • Collin, GH
  • Conrad, JM
  • Cowen, DF
  • Cross, R
  • Day, M
  • De André, JPAM
  • De Clercq, C
  • Del Pino Rosendo, E
  • Dembinski, H
  • De Ridder, S
  • Desiati, P
  • De Vries, KD
  • De Wasseige, G
  • De With, M
  • Deyoung, T
  • Di Lorenzo, V
  • Dujmovic, H
  • Dumm, JP
  • Dunkman, M
  • Eberhardt, B
  • Ehrhardt, T
  • Eichmann, B
  • Eller, P
  • Euler, S
  • Evenson, PA
  • Fahey, S
  • Fazely, AR
  • Feintzeig, J
  • Felde, J
  • Filimonov, K
  • Finley, C
  • Flis, S
  • Fösig, CC
  • Franckowiak, A
  • Friedman, E
  • Fuchs, T
  • Gaisser, TK
  • Gallagher, J
  • Gerhardt, L
  • Ghorbani, K
  • Giang, W
  • Gladstone, L
  • Glauch, T
  • Glüsenkamp, T
  • Goldschmidt, A
  • et al.
Abstract

© ESO, 2017. On February 17, 2016, the IceCube real-time neutrino search identified, for the first time, three muon neutrino candidates arriving within 100 s of one another, consistent with coming from the same point in the sky. Such a triplet is expected once every 13.7 years as a random coincidence of background events. However, considering the lifetime of the follow-up program the probability of detecting at least one triplet from atmospheric background is 32%. Follow-up observatories were notified in order to search for an electromagnetic counterpart. Observations were obtained by Swift's X-ray telescope, by ASAS-SN, LCO and MASTER at optical wavelengths, and by VERITAS in the very-high-energy gamma-ray regime. Moreover, the Swift BAT serendipitously observed the location 100 s after the first neutrino was detected, and data from the Fermi LAT and HAWC observatory were analyzed. We present details of the neutrino triplet and the follow-up observations. No likely electromagnetic counterpart was detected, and we discuss the implications of these constraints on candidate neutrino sources such as gamma-ray bursts, core-collapse supernovae and active galactic nucleus flares. This study illustrates the potential of and challenges for future follow-up campaigns.

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