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) …

Blazars are very broadband cosmic sources with spectra spanning over twenty orders of
magnitude in frequency, down to the 100 MHz regime in the radio range, up to VHE at …

Observational information on high-energy astrophysical neutrinos is being continuously
collected by the IceCube observatory. However, the sources of the neutrinos are still …

Blazars are active galactic nuclei (AGN) with relativistic jets whose non-thermal radiation is
extremely variable on various timescales,–. This variability seems mostly random, although …

Recently we have shown that high-energy neutrinos above 200 TeV detected by IceCube
are produced within several parsecs in the central regions of radio-bright blazars, that is …

3C 279 is an archetypal blazar with a prominent radio jet that show broadband flux density
variability across the entire electromagnetic spectrum. We use an ultra-high angular …

In an effort to locate the sites of emission at different frequencies and physical processes
causing variability in blazar jets, we have obtained high time-resolution observations of BL …

Among active galactic nuclei, blazars show extreme variability properties. We here
investigate the case of the BL Lac object S4 0954+ 65 with data acquired in 2019–2020 by …

We present the results of variability power spectral density (PSD) analysis using
multiwavelength radio to GeV γ-ray light curves covering timescales of decades/years to …

ABSTRACT Fermi-Large Area Telescope (LAT) observations provide continuous and
regularly sampled measurements of gamma-ray photon flux for hundreds of blazars. Many of …