# ANTARES neutrino search for time and space correlations with IceCube high-energy neutrino events

Abstract : In the past years, the IceCube Collaboration has reported in several analyses the observation of astrophysical high-energy neutrino events. Despite a compelling evidence for the first identification of a neutrino source, TXS 0506+056, the origin of the majority of these events is still unknown. In this paper, a possible transient origin of the IceCube astrophysical events is searched for using neutrino events detected by the ANTARES telescope. The arrival time and direction of 6894 track-like and 160 shower-like events detected over 2346 days of livetime are examined to search for coincidences with 54 IceCube high-energy track-like neutrino events, by means of a maximum likelihood method. No significant correlation is observed and upper limits on the one-flavour neutrino fluence from the direction of the IceCube candidates are derived. The non-observation of time and space correlation within the time window of 0.1 days with the two most energetic IceCube events constrains the spectral index of a possible point-like transient neutrino source, to be harder than $-2.3$ and $-2.4$ for each event, respectively.
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https://hal.archives-ouvertes.fr/hal-02066913
Contributor : Inspire Hep <>
Submitted on : Wednesday, March 13, 2019 - 5:51:08 PM
Last modification on : Tuesday, December 10, 2019 - 4:58:08 PM

### Citation

A. Albert, M. André, M. Anghinolfi, G. Anton, M. Ardid, et al.. ANTARES neutrino search for time and space correlations with IceCube high-energy neutrino events. Astrophys.J., 2019, 879 (2), pp.108. ⟨10.3847/1538-4357/ab253c⟩. ⟨hal-02066913⟩

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