This review demonstrates the unique role of the neutrino by discussing in detail the physics
of and with neutrinos. We deal with neutrino sources, neutrino oscillations, absolute masses …

Multi-messenger astrophysics, a long-anticipated extension to traditional multiwavelength
astronomy, has emerged over the past decade as a distinct discipline providing unique and …

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

We analyze the parsec-scale jet kinematics from 2007 June to 2018 December of a sample
of γ-ray bright blazars monitored roughly monthly with the Very Long Baseline Array (VLBA) …

We present evidence that TXS 0506+ 056, the first plausible non-stellar neutrino source,
despite appearances, is not a blazar of the BL Lac type but is instead a masquerading BL …

The blazar PKS 0735+ 178 is possibly associated with multiple neutrino events observed by
the IceCube, Baikal, Baksan, and KM3NeT neutrino telescopes while it was flaring in the γ …

We investigate whether the emission of neutrinos observed in 2014–2015 from the direction
of the blazar TXS 0506+ 056 can be accommodated with leptohadronic multiwavelength …

We report the first> 99% confidence detection of X-ray polarization in BL Lacertae. During a
recent X-ray/γ-ray outburst, a 287 ks observation (2022 November 27–30) was taken using …

We explore the possibility that relativistic protons in the extremely powerful jets of blazars
may boost via elastic collisions the dark matter particles in the surroundings of the source to …

Abstract In 2019 July, the IceCube experiment detected a high-energy neutrino from the
direction of the powerful blazar PKS 1502+ 106. We perform multiwavelength and …