Morozova, Daria

Multiwavelength observations of 6 BLLac objects in 2008-2012.

Author list: D. A. Morozova, I. Agudo, D. A. Blinov, S. G. Jorstad, V. M. Larionov, A. P. Marscher, P. Smith, I. S. Troitskiy

We present results of 4 years of multifrequency observations of 6 Bllac objects (3C 66A,S5 0716+71 ,PKS 0735+17,S4 0954+68,W Com and OT 081) carried out  with the Fermi Large Area Telescope (LAT) at gamma-rays , with different ground based telescopes in photometric and polarimetric modes at optical wavelengths, and with the Very Long Baseline Array (VLBA) at 43 GHz. We have analyzed total intensity images of the blazars obtained with the VLBA to study the morphological and kinematic evolution of the pc-scale jets of the sources. For all sources we have compared flux variations in the VLBI core and bright superluminal knots with gamma-ray and optical light curves.The majority of gamma-ray flares coincide with the appearance of a new superluminal knot as well as with a flare in the optical band and in the millimeter-wave core.These results support the conclusion that many gamma-ray and optical flares in blazars originate in the vicinity of the millimeter-wave core or even downstream the jet.