Very 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 de...
Very high-energy gamma-rays (VHE, E>100 GeV) propagating over cosmological distances can interact wi...
Very high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with...
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy den...
International audienceVery high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological dista...
Very high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with...
Very high-energy γ-rays (VHE, E & 100 GeV) propagating over cosmological distances can interact with...
Very high-energy gamma-rays (VHE, E>100 GeV) propagating over cosmological distances can interact wi...
Very high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with...
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy den...
International audienceVery high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological dista...
Very high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with...
Very high-energy γ-rays (VHE, E & 100 GeV) propagating over cosmological distances can interact with...
Very high-energy gamma-rays (VHE, E>100 GeV) propagating over cosmological distances can interact wi...
Very high-energy γ rays (VHE, E ≳ 100 GeV) propagating over cosmological distances can interact with...
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy den...