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Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of H.E.S.S. blazars

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cris.lastimport.scopus2024-02-12T20:48:48Z
dc.abstract.enVery high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with the low-energy photons of the extragalactic background light (EBL) and produce electron-positron pairs. The transparency of the Universe to VHE γ rays is then directly related to the spectral energy distribution (SED) of the EBL. The observation of features in the VHE energy spectra of extragalactic sources allows the EBL to be measured, which otherwise is very difficult. An EBL model-independent measurement of the EBL SED with the H.E.S.S. array of Cherenkov telescopes is presented. It was obtained by extracting the EBL absorption signal from the reanalysis of high-quality spectra of blazars. From H.E.S.S. data alone the EBL signature is detected at a significance of 9.5σ, and the intensity of the EBL obtained in different spectral bands is presented together with the associated γ-ray horizon.
dc.affiliationUniwersytet Warszawski
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dc.date.accessioned2024-01-25T09:14:58Z
dc.date.available2024-01-25T09:14:58Z
dc.date.copyright2017-07-19
dc.date.issued2017
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.versionORIGINAL_AUTHOR
dc.description.volume606
dc.identifier.doi10.1051/0004-6361/201731200
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/112101
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2017A&A...606A..59H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA59
dc.rightsOther
dc.sciencecloudnosend
dc.titleMeasurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of H.E.S.S. blazars
dc.typeJournalArticle
dspace.entity.typePublication