Relativistic jets of active galactic nuclei have been known to exist for 100 years. Blazars with
their jet pointing close to our line of sight are some of the most variable and extreme objects …

The author presents a model for variability of the flux and polarization of blazars in which
turbulent plasma flowing at a relativistic speed down a jet crosses a standing conical shock …

We present results from monitoring the multi-waveband flux, linear polarization, and parsec-
scale structure of the quasar PKS 1510− 089, concentrating on eight major γ-ray flares that …

Aims. We have calculated variability Doppler boosting factors, Lorentz factors, and viewing
angles for a large sample of sources by using total flux density observations at 22 and 37 …

Since 1978, when BL Lac objects and violently variable quasars were married to become
“blazars”, physical interpretations of the phenomenon have evolved. Remarkably, though …

We present images from a long-term program (MOJAVE: Monitoring of Jets in active galactic
nuclei (AGNs) with VLBA Experiments) to survey the structure and evolution of parsec-scale …

We analyze the multi-frequency behavior of the quasar 3C 454.3 during three prominent γ-
ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn. The data reveal a repeating …

We present the first polarimetric space very long baseline interferometry (VLBI) observations
of OJ 287, observed with RadioAstron at 22 GHz during a perigee session on 2014 April 4 …

We combine time-dependent multi-waveband flux and linear polarization observations with
submilliarcsecond-scale polarimetric images at λ= 7 mm of the BL Lacertae type blazar …

We present the first polarimetric space very long baseline interferometry (VLBI) imaging
observations at 22 GHz. BL Lacertae was observed in 2013 November 10 with the …