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The picture of relativistic jet from Fermi-LAT and multi-band observations of blazar 3C 279

Published online by Cambridge University Press:  24 February 2011

Masaaki Hayashida  and
Greg Madejski
Masaaki Hayashida
Affiliation:
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, CA, 94025, USA email: [email protected]
Greg Madejski
Affiliation:
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, CA, 94025, USA email: [email protected]
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Abstract

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Strong and variable radiation detected over all accessible energy bands in blazar arises from a relativistic, Doppler-boosted jet pointing close to our line of sight. Flat Spectrum Radio Quasar 3C 279 was one of the brightest γ-ray blazars in the sky at the time of the discovery with EGRET. Since the successful launch of the Fermi Gamma-ray Space telescope in 2008, we have organized extensive multi-band observational campaign of 3C 279 from radio to γ-ray bands, also including optical polarimetric observations. The uninterrupted monitoring in the γ-ray band by Fermi-LAT together with the multi-band data provide us with new insights of the relativistic jet of blazar. Here, we present the results of the first-year multi-band campaign of 3C 279 including the discovery of a γ-ray flare event associated with a dramatic change of the optical polarization - as well as a discovery of an “orphan” X-ray flare, unassociated with prominent outbursts in other bands.

Keywords

galaxies: jets – quasars: individual (3C 279) – gamma rays: observations – X-rays: galaxies – polarization
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 155 - 159
Copyright
Copyright © International Astronomical Union 2011

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