The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

Abstract The Giant Radio Array for Neutrino Detection (GRAND) is a planned large-scale
observatory of ultra-high-energy (UHE) cosmic particles, with energies exceeding 10 8 GeV …

The observation of electromagnetic radiation from radio to γ-ray wavelengths has provided a
wealth of information about the Universe. However, at PeV (10 15 eV) energies and above …

We present a measurement of the high-energy astrophysical muon–neutrino flux with the
IceCube Neutrino Observatory. The measurement uses a high-purity selection of650k …

Astrophysical neutrinos are excellent probes of astroparticle physics and high-energy
physics. With energies far beyond solar, supernovae, atmospheric, and accelerator …

The origins of the high-energy cosmic neutrino flux remain largely unknown. Recently, one
high-energy neutrino was associated with a tidal disruption event (TDE). Here we present …

The detection of high-energy cosmic neutrinos as cosmic messengers has been an
important goal of astroparticle physics. Being stable, electrically neutral particles, high …

Detection of the IceCube-170922A neutrino coincident with the flaring blazar TXS 0506+
056, the first and only∼ 3σ high-energy neutrino source association to date, offers a …

We report a quasidifferential upper limit on the extremely-high-energy (EHE) neutrino flux
above 5× 10 6 GeV based on an analysis of nine years of IceCube data. The astrophysical …

A neutrino with energy∼ 290 TeV, IceCube-170922A, was detected in coincidence with the
BL Lac object TXS 0506+ 056 during enhanced gamma-ray activity, with chance …