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- W2003685448 abstract "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 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. The cosmological processes, connecting the physics of matter in Active Galactic Nuclei will be observed in the energy spectrum of electromagnetic radiation. The un- derstanding of mechanisms in active galactic nuclei re- quires the detection of a large sample of very high en- ergy gamma-ray objects at varying redshifts. The detec- tion of the very high energy -ray sources at the red- shifts z=0.0179 to z=1.375 with SHALON telescope gives an opportunity to constrain extragalactic background light (EBL) density, based on modification to gamma-ray spec- tra and thus it will help to reconstruct the the cosmological history of the EBL." @default.
- W2003685448 created "2016-06-24" @default.
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- W2003685448 date "2013-01-01" @default.
- W2003685448 modified "2023-09-23" @default.
- W2003685448 title "Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei" @default.
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- W2003685448 doi "https://doi.org/10.1051/epjconf/20125210006" @default.
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