Mechanism of very high energy radiation in BL Lacertae object 3C 66A
arXiv:0911.4036 · doi:10.1051/0004-6361/200913035
Abstract
Our goal is to understand the nature of blazars and the mechanisms for the generation of high-energy -rays, through the investigation of the blazar 3C 66A. We model the high energy spectrum of 3C 66A, which has been observed recently with the Fermi-LAT and VERITAS telescope. The spectrum has a hard change from the energy range of 0.2-100 GeV to 200-500 GeV in recent almost contemporaneous observations of two telescopes. The de-absorbed VERITAS spectrum greatly depends on the redshift, which is highly uncertain. If z=0.444 is adopted, we are able to use the SSC model to produce the Fermi-LAT component and the EC model to the VERITAS component. However, if z=0.1, the intrinsic VERITAS spectrum will be softer, there will be a smooth link between the Fermi-LAT and VERITAS spectra which can be explained using a SSC model.
5 pages, 3 figures. accepted for publication in A&A
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