Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

V.G. Sinitsyna, V.Y. Sinitsyna, U. Gensch, M. Walter
2013 EPJ Web of Conferences  
Extragalactic background radiation blocks the propagation of TeV gamma-ray over large distances by producing e + e − pairs. As a result, primary spectrum of gamma-source is changed, depending on spectrum of background light. So, hard spectra of Active Galactic Nuclei with high red shifts allow the determination of a EBL spectrum. The redshifts of SHALON TeV gamma-ray sources range from 0.018 to 1.375 those spectra are resolved at the energies from 800GeV to 30 TeV. Spectral energy distribution
more » ... nergy distribution of EBL constrained from observations of Mkn421 (z=0.031), Mkn501 (z=0.034), Mkn180 (z=0.046), OJ287 (z=0.306), 3c454.3 (z=0.859) and 1739+522 (z=1.375) together with models and measurements are presented. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2 0 , which . permits unrestricted use, distributi and reproduction in any medium, provided the original work is properly cited. on, EPJ Web of Conferences
doi:10.1051/epjconf/20135210006 fatcat:2t6guqbpqbbnzhtkmv33mq64lm