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Open AccessArticle

Optical Outburst of the Blazar S4 0954+658 in Early 2015

Department of Astrophysics, St. Petersburg State University, Universitetsky Prospekt, 28, Peterhof, St. Petersburg 198504, Russia
Institute for Astrophysical Research, Boston University, 725 Commonwealth Ave., Boston, MA 02215, USA
Department of Physics, Institute for Plasma Physics, University of Crete, Heraklion GR-71003, Greece
Crimean Astrophysical Observatory, P/O Nauchny, Crimea 298409, Russia
Harvard-Smithsonian CfA, Cambridge, MA 02138, USA
Author to whom correspondence should be addressed.
Academic Editor: Emilio Elizalde
Galaxies 2016, 4(3), 24;
Received: 12 July 2016 / Revised: 29 August 2016 / Accepted: 30 August 2016 / Published: 3 September 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
We analyze the behavior of the BL Lac object S4 0954+658 during an unprecedented bright optical flare in early 2015. The optical flare was accompanied by a powerful γ -ray flare and the detection of very-high-energy γ -ray emission. We analyze total and polarized intensity images obtained with the VLBA at 43 GHz and discover a new bright polarized superluminal knot, which was ejected from the VLBI-core during the peak of the flare. View Full-Text
Keywords: blazars; jets; polarization blazars; jets; polarization
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Morozova, D.; Larionov, V.; Jorstad, S.; Marscher, A.; Troitskaya, Y.; Troitskiy, I.; Blinov, D.; Borman, G.; Gurwell, M. Optical Outburst of the Blazar S4 0954+658 in Early 2015. Galaxies 2016, 4, 24.

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