The Multifrequency Campaign on 3C 279 in January 2006

Abstract

We present the results of a multifrequency campaign from radio to hard X-ray energies on the blazar 3C 279 during an optical high-state in January 2006. We give the observational results (multifrequency light curves and spectra) and compile an SED. This complements an SED from an optical low-state in June 2003. Surprisingly the two SEDs differ only in their high-energy synchrotron emission (near-IR - UV), while the low-energy inverse-Compton emission (X- to Gamma-rays) remained unchanged. By interpreting with a steady-state leptonic emission model, the variability among the SED can be reproduced by a change solely of the low-energy cutoff of the relativistic electron distribution. In an internal shock model for blazar emission, such a change could e.g. achieved through a varying relative Lorentz factor of colliding shells producing internal shocks in the jet.

11 pages, 9 figures, A&A accepted

References in corpus (12)

• Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
• The Simultaneous Optical-to-X-ray Spectral Energy Distribution of Soft X-ray Selected AGN observed by Swift
• Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007
• Fermi observations of TeV-selected AGN
• Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007
• Multiwavelength observations of a TeV-Flare from W Comae
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71, III. Rapid and correlated flux density variability from radio to sub-mm bands
• The WEBT Campaign on the Blazar 3C279 in 2006
• Multifrequency variability of the blazar AO 0235+164. The WEBT campaign in 2004-2005 and long-term SED analysis
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71: II. A search for intra-day variability at millimetre wavelengths with the IRAM 30 m telescope
• Synchrotron flaring in the jet of 3C 279
• Is the Universe More Transparent to Gamma Rays Than Previously Thought?

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