Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 27: Gammaastronomie II
T 27.2: Vortrag
Montag, 9. März 2015, 17:00–17:15, I.13.71 (HS 28)
MAGIC Observation of an Exceptional TeV Gamma-ray Flare in the Active Galaxy IC 310 — •Dorit Glawion1, Julian Sitarek2, Karl Mannheim1, Dominik Elsässer1, Matthias Kadler1, Robert Schulz1, Eduardo Ros3, Uwe Bach3, Felicia Krauß4, and Jörn Wilms4 for the MAGIC collaboration — 1ITPA Würzburg — 2IFAE Barcelona — 3Max-Planck-Institut für Radioastronomie, Bonn — 4ECAP Erlangen, Dr. Karl Remeis-Sternwarte, Bamberg
The AGN IC 310 has been identified as a gamma-ray emitter based on observations at very high energies (VHE, E > 100 GeV) with the MAGIC telescopes. Despite IC 310 having been classified as a radio galaxy with the jet observed at an angle > 10 degrees, it exhibits a mixture of multiwavelength properties of a radio galaxy and a blazar, possibly making it a transitional object. On the night of 12/13th of November 2012 the MAGIC telescopes observed a series of strong outbursts from the direction of IC 310 with flux-doubling time scales faster than 5 min and a peculiar spectrum spreading over two orders of magnitude. Such fast variability constrains the size of the emission region to be smaller than 20% of the gravitational radius of its central black hole. In fact, the measurement challenges the shock acceleration models, commonly used in explanation of gamma-ray radiation from active galaxies. We will show that this emission can be associated with pulsar-like particle acceleration by the electric field across a magnetospheric gap at the base of the jet.