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Multi-wavelength observations of the flaring gamma-ray blazar 3C 66A in 2008 October

Journal Article · · The Astrophysical Journal
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We report that Tthe BL Lacertae object 3C 66A was detected in a flaring state by the Fermi Large Area Telescope (LAT) and VERITAS in 2008 October. In addition to these gamma-ray observations, F-GAMMA, GASP-WEBT, PAIRITEL, MDM, ATOM, Swift, and Chandra provided radio to X-ray coverage. The available light curves show variability and, in particular, correlated flares are observed in the optical and Fermi-LAT gamma-ray band. The resulting spectral energy distribution can be well fitted using standard leptonic models with and without an external radiation field for inverse Compton scattering. It is found, however, that only the model with an external radiation field can accommodate the intra-night variability observed at optical wavelengths.
Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
The Fermi-LAT Collaboration; The GASP-WEBT Consortium; The VERITAS Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1357269
Alternate ID(s):
OSTI ID: 21567511
Journal Information:
The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 726; ISSN 0004-637X
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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BLAZARS AS ULTRA-HIGH-ENERGY COSMIC-RAY SOURCES: IMPLICATIONS FOR TeV GAMMA-RAY OBSERVATIONS journal March 2012
LEPTONIC AND HADRONIC MODELING OF FERMI -DETECTED BLAZARS journal April 2013
MULTIWAVELENGTH VARIABILITY PROPERTIES OF FERMI BLAZAR S5 0716+714 journal February 2014
Axion-like particle imprint in cosmological very-high-energy sources journal November 2011
On weak Redshift Dependence of Gamma-Ray Spectra of Distant Blazars journal May 2012
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Discovery of very high energy gamma rays from 1ES 1440+122 journal June 2016
KVN observations reveal multiple γ-ray emission regions in 3C 84? journal January 2018
High-energy neutrino flux from individual blazar flares journal September 2019
Hadronic models of blazars require a change of the accretion paradigm journal April 2015
Modelling the very high energy flare of 3C 279 using one-zone leptonic model: Modelling the VHE flare of 3C 279 journal November 2011
The 3CR Chandra Snapshot Survey: Extragalactic Radio Sources with 0.5 < z < 1.0 journal January 2018
Axion-like particle imprint in cosmological very-high-energy sources text January 2011
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High Energy Emission Processes in OJ 287 during 2009 Flare text January 2013
Hadronic models of blazars require a change of the accretion paradigm text January 2015
The F-GAMMA program: Multi-frequency study of Active Galactic Nuclei in the Fermi era. Program description and the first 2.5 years of monitoring text January 2016
High energy neutrino flux from individual blazar flares text January 2019

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