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 …

In this work, we report the presence of rapid intra-night optical variations in both flux and
polarization of the blazar BL Lacertae during its unprecedented 2020–2021 high state of …

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 the Fermi-Large Area Telescope 10 yr long light curve (LC)
modeling of selected blazars: six flat-spectrum radio quasars (FSRQs) and five BL Lacertae …

We report the detection (> 4σ) of a quasi-periodic oscillation (QPO) in the gamma-ray light
curve of 3C 454.3 along with a simultaneous marginal QPO detection (> 2.4 σ) in the optical …

We detected a possible quasi-periodic oscillation (QPO) of∼ 71 d in the 0.1–300 GeV γ-ray
Fermi-Large Area Telescope light curve of the high-redshift flat spectrum radio quasar B2 …

We present a polarization variability analysis of a sample of 26 γ-ray blazars monitored by
the Steward Observatory between 2008 and 2018 in the optical band. We investigate the …

We report on a recent multiband optical photometric and polarimetric observational
campaign of the blazar OJ 287 that was carried out during 2016 September–2017 …

We performed a long-term optical (B, V, R bands), infrared (J and K bands), and radio band
(15, 22, 37 GHz band) study of the flat spectrum radio quasar, 3C 454.3, using data collected …

We present a multiwavelength spectral and temporal investigation of OJ 287 emission
during its strong optical-to-X-ray activity between 2016 July and 2017 July. The daily γ-ray …