Refine
Has Fulltext
- no (39)
Document Type
- Article (39) (remove)
Language
- English (39)
Is part of the Bibliography
- yes (39)
Keywords
- gamma rays: general (15)
- radiation mechanisms: non-thermal (10)
- cosmic rays (7)
- ISM: supernova remnants (6)
- gamma rays: galaxies (6)
- acceleration of particles (5)
- gamma rays: stars (5)
- galaxies: active (4)
- gamma rays: ISM (4)
- ISM: clouds (3)
- astroparticle physics (3)
- galaxies: jets (3)
- BL Lacertae objects: individual: PKS 2155-304 (2)
- X-rays: binaries (2)
- gamma-rays: galaxies (2)
- pulsars: general (2)
- pulsars: individual: PSR B0833-45 (2)
- stars: massive (2)
- surveys (2)
- BL Lacertae objects: general (1)
- BL Lacertae objects: individual (Mrk 501) (1)
- Galaxy: center (1)
- Galaxy: general (1)
- ISM: individual objects (SNR G338.3-0.0, SNR G338.5+0.1) (1)
- ISM: individual objects: Puppis A (1)
- X-rays: individuals: Circinus X-1 (1)
- X-rays: individuals: GRS 1915+105 (1)
- X-rays: individuals: V4641 Sgr (1)
- astroparticle physic (1)
- binaries: general (1)
- black hole physics (1)
- catalogs (1)
- convection (1)
- cosmic background radiation (1)
- dark matter detectors (1)
- dark matter experiments (1)
- diffuse radiation (1)
- diffusion (1)
- dwarfs galaxies (1)
- galaxies: individual: PKS 0625-354 (1)
- galaxies: nuclei (1)
- galaxies: starburst (1)
- gamma ray detectors (1)
- gamma-ray burst: individual (GRB 170817A) (1)
- gravitational lensing: strong (1)
- gravitational waves (1)
- infrared: diffuse background (1)
- quasars: individual: 3C 279 (1)
- relativistic processes (1)
- stars: early-type (1)
- stars: individual: 1FGL J1018.6-5856 (1)
- stars: magnetars (1)
- stars: winds, outflows (1)
- supernovae: general (1)
Institute
- Institut für Physik und Astronomie (39) (remove)
Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars
(2017)
Very high-energy gamma rays (VHE, E greater than or similar to 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 gamma 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 9.5 sigma, and the intensity of the EBL obtained in different spectral bands is presented together with the associated gamma-ray horizon.