Intrinsic spectra of H.E.S.S. blazars : what would we see without EBL absorption

Intrinsic spectra blazars : what would we see without EBL absorptionAuthors:Carlo Romoli, David Sanchez, Matthias Lorentz, Pierre Brun on behalf collaborationThe vast majority extragalactic sources detected in very high (Eu003e 200 GeV) are active galactic nuclei (AGN) located at cosmological distances. During their travel towards earth, emitted gamma-rays suffer for absorption extragalatic background light (EBL). The density EBL is not very well constraint direct or indirect measurement which leads uncertainties on intrisic spectrum sources. high-quality AGN’s spectra obtained with High Energy Stereoscopic System (H.E.S.S.) have been used perform a model-independent measurement EBL spectral energy distribution. While precision this measurement remains limited, it reflects the sensitivity alone EBL and offers possibility to access intrinsic spectra AGNs in a consistent manner, taking into account derived uncertainties on EBL spectral energy distribution.In this constribution, we study intrinsic spectra as measured H.E.S.S. and Fermi Large Area Telescope (LAT) several blazars of sky. This is then opportunity have an new insight in emission processes at play in jets AGN. The data presented consist monitoring data quiecent state blazars and also flares bright objects, such as PKS 2155-304, Mrk 421, recorded by