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astro-ph.HE2026

Constraining gamma-ray burst parameters with the first ultra-high energy neutrino event KM3-230213A

KM3NeT Collaboration, O. Adriani, A. Albert +278

Context: The detection of the highest energy neutrino observed to date by KM3NeT, with an estimated energy of 220 PeV, opens up new possibilities for the study and identification o…

astro-ph.HE2026

Optimizing the potential of KM3NeT in detecting core-collapse supernovae

KM3NeT Collaboration, O. Adriani, A. Albert +285

Core-collapse supernovae mark the end of life of massive stars. However, despite their importance in astrophysics, their underlying mechanisms remain unclear. Neutrinos that emerge…

astro-ph.HE2025

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

The KM3NeT Collaboration

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 neut…

astro-ph.HE2025

Characterizing Candidate Blazar Counterparts of the Ultra-High-Energy Event KM3-230213A

KM3NeT Collaboration, MessMapp Group, LAT Collaboration +13

High-energy astrophysical neutrinos serve as crucial messengers for understanding hadronic acceleration processes and identifying the origins of cosmic rays, with blazars among the…

astro-ph.HE2025

Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS

O. Adriani, Y. Akaike, K. Asano +77

The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray (CR) iron and sub-iron events over a…

astro-ph.HE2025

KM3NeT Constraint on Lorentz-Violating Superluminal Neutrino Velocity

KM3NeT Collaboration, O. Adriani, S. Aiello +290

Lorentz invariance is a fundamental symmetry of spacetime and foundational to modern physics. One of its most important consequences is the constancy of the speed of light. This in…