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arXiv · 2511.13886

Blazars as a Potential Origin of the KM3-230213A Event

The KM3NeT Collaboration
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Abstract

The KM3NeT collaboration has reported the detection of the highest energy neutrino event observed to date. The energy of the event is of the order of 220 PeV hinting towards a neutrino flux at the highest energies. In this article, the potential blazar origin for this event is explored. The publicly available Astro-Multimessenger Modeling software is used to model the blazar gamma-ray and neutrino fluxes. It is concluded that a population of blazars could produce the diffuse flux compatible with the observation of the ultra-high energy event detected by the KM3NeT/ARCA detector. At the same time, the gamma-ray flux produced by such a population of blazars is consistent with the diffuse gamma-ray flux measured by the Fermi Large Area Telescope.

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The KM3NeT Collaboration. 2025-11-17. Blazars as a Potential Origin of the KM3-230213A Event. https://arxiv.org/abs/2511.13886

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