Connection between parsec-scale radio jet and gamma-ray flares in the blazar 1156+295

V. Ramakrishnan, J. León-Tavares, E. A. Rastorgueva-Foi, K. Wiik, S. G. Jorstad, A. P. Marscher, M. Tornikoski, I. Agudo, A. Lähteenmäki, E. Valtaoja, M. F. Aller, D. A. Blinov, C. Casadio, N. V. Efimova, M. A. Gurwell, J. L. Gómez, V. A. Hagen-Thorn, M. Joshi, E. Järvelä, T. S. KonstantinovaE. N. Kopatskaya, V. M. Larionov, E. G. Larionova, L. V. Larionova, N. Lavonen, N. R. MacDonald, I. M. McHardy, S. N. Molina, D. A. Morozova, E. Nieppola, J. Tammi, B. W. Taylor, I. S. Troitsky

Research output: Contribution to journalConference articleScientificpeer-review


We discuss the connection of γ-ray events to the superluminal component ejection in the jet of the blazar 1156+295. The broadband variability of the source is analysed using multifrequency observations (X-ray through mm single-dish) and radio band imaging data at 43 GHz from Very Long Baseline Array (VLBA) observations. The kinematics of the jet over the interval 2007.0-2012.5, reveal the presence of four moving and one stationary component in the inner region of the blazar jet. The propagation of the third and fourth components in the jet corresponds closely in time to the active phase of the source in γ rays. The physical signatures of these components allowed us to constrain the γ-ray emitting region in the parsec-scale jet.

Original languageEnglish
Article number015
JournalProceedings of Science
Publication statusPublished - 1 Jan 2014
MoE publication typeA4 Conference publication
EventEuropean VLBI Network Symposium and Users Meeting - Cagliari, Italy
Duration: 7 Oct 201410 Oct 2014
Conference number: 12


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