BL Lac objects are active nuclei, hosted in massive elliptical galaxies, the emission of which
is dominated by a relativistic jet closely aligned with the line of sight. This implies the …

The recent hint of correlated γ-ray and neutrino emission from the blazar TXS 0506+ 056
has renewed interest in blazars as the source of high-energy neutrinos, in which the …

We present X-ray polarimetry observations from the Imaging X-ray Polarimetry Explorer
(IXPE) of three low spectral peak and one intermediate spectral peak blazars, namely 3C …

In this paper we compile the analysis of∼ 200 synchrotron flare events from∼ 90 distinct
objects/events for which the distance is well established, and hence the peak luminosity can …

We present the results of a series of radio, optical, X-ray, and γ-ray observations of the BL
Lac object S50716+ 714 carried out between April 2007 and January 2011. The …

Aiming to delineate the physical framework of blazars, we present an effective method to
estimate four important parameters based on the idea proposed by Becker & Kafatos …

We present a general relativistic (GR) model of jet variability in active galactic nuclei due to
orbiting blobs in helical motion along a funnel or cone-shaped magnetic surface anchored to …

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 …

In this paper, multiwavelength data are compiled for a sample of 1425 Fermi blazars to
calculate their spectral energy distributions (SEDs). A parabolic function, ${\rm {log}}{(\nu {F} …

The nearly 33 yr long-term radio light curve obtained with the Metsähovi Radio Observatory
14 m telescope at 37 GHz and the recent 12.7 yr γ-ray light curve of the blazar S5 0716+ 714 …