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Multiwavelength follow-up of a rare IceCube neutrino multiplet
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Multiwavelength follow-up of a rare IceCube neutrino multiplet

T. Karg, M. Hütten, Martin Pohl, I. Sadeh, M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, …
arxiv.org
20 Feb 2017
DOI: https://doi.org/10.48550/arXiv.1702.06131
url
https://arxiv.org/abs/1702.06131View
Preprint (Author's original)arXiv.org - Non-exclusive license to distribute,  Open

Abstract

active astroparticle physics bursts High Energy Astrophysical Phenomena neutrinos Astronomy Astrophysics Physics
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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