Over the past few decades, our knowledge of jets produced by active galactic nuclei (AGN)
has greatly progressed thanks to the development of very-long-baseline interferometry …

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 analyze the parsec-scale jet kinematics from 2007 June to 2013 January of a sample of
γ-ray bright blazars monitored roughly monthly with the Very Long Baseline Array at 43 GHz …

We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images
in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry …

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 …

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 …

Accreting supermassive black holes in active galactic nuclei (AGN) produce powerful
relativistic jets that shine from radio to GeV/TeV γ-rays. Over the past decade, AGN jets have …

Blazars are active galactic nuclei, which are powerful sources of radiation whose central
engine is located in the core of the host galaxy. Blazar emission is dominated by non …

We describe a multiwavelength program of monitoring of a sample of bright γ-ray blazars,
which the Boston University (BU) group has being carrying out since June 2007. The …

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 …