A1 Journal article – refereed

3C 66A: Variability in 2007-2015

List of Authors: Hagen-Thorn VA, Morozova DA, Arkharov AA, Hagen-Thorn EI, Troitsky IS, Troitskaya YV, Milanova YV, Volkov EV, Takalo LO, Sillanpää A


Publication year: 2017

Journal: Astronomicheskii Zhurnal / Astronomy Reports

Journal name in source: ASTRONOMY REPORTS

Journal acronym: ASTRON REP+

Volume number: 61

Issue number: 6

Number of pages: 10

ISSN: 1063-7729

eISSN: 1562-6881

DOI: http://dx.doi.org/10.1134/S1063772917060051

The results of photometric (BV RIJHK) and polarimetric (R)monitoring of the blazar 3C 66A performed at the St. Petersburg State University and the Central AstronomicalObservatory of the Russian Academy of Sciences in 2007-2015, radio observations performed by the Boston University team with the Very Long Baseline Array at 43 GHz, and a gamma-ray light curve based on observations with the Fermi SpaceObservatory are presented. Color variations of the object are studied. Changes in the optical spectral energy distribution are observed at some times, indicating the appearance and disappearance of individual variable sources. A variable source with a degree of polarization of 36% is identified, which is responsible for the polarization variations observed during one episode. The correlations between the variations in the different spectral ranges indicate that the optical and gamma-ray radiation originates near the radio core detected at 43 GHz. The presence of five superluminal components emerging from the core is detected.

Last updated on 2021-24-06 at 08:22