Authors
H Abdalla, Attila Abramowski, F Aharonian, F Ait Benkhali, AG Akhperjanian, Tom Andersson, EO Angüner, M Arakawa, M Arrieta, Pierre Aubert, Michael Backes, Arnim Balzer, Michelle Barnard, Yvonne Becherini, J Becker Tjus, David Berge, Sabrina Bernhard, K Bernloehr, R Blackwell, Markus Böttcher, Catherine Boisson, J Bolmont, S Bonnefoy, Pol Bordas, Johan Bregeon, Francois Brun, Pierre Brun, Mark Bryan, M Buechele, Tomasz Bulik, M Capasso, John Carr, Sabrina Casanova, M Cerruti, N Chakraborty, Ryan CG Chaves, Andrew Chen, J Chevalier, M Coffaro, Sergio Colafrancesco, Gabriele Cologna, B Condon, Jan Conrad, Y Cui, ID Davids, J Decock, B Degrange, C Deil, J Devin, P de Wilt, L Dirson, A Djannati-Atai, W Domainko, A Donath, LO’C Drury, K Dutson, J Dyks, T Edwards, K Egberts, P Eger, J-P Ernenwein, S Eschbach, Christian Farnier, S Fegan, MV Fernandes, A Fiasson, G Fontaine, A Foerster, S Funk, M Fuessling, S Gabici, YA Gallant, T Garrigoux, G Giavitto, B Giebels, JF Glicenstein, D Gottschall, Arti Goyal, M-H Grondin, J Hahn, M Haupt, J Hawkes, G Heinzelmann, G Henri, G Hermann, JA Hinton, W Hofmann, C Hoischen, TL Holch, M Holler, D Horns, A Ivascenko, H Iwasaki, A Jacholkowska, Marek Jamrozy, M Janiak, D Jankowsky, F Jankowsky, M Jingo, T Jogler, L Jouvin, I Jung-Richardt, MA Kastendieck, K Katarzyński, M Katsuragawa, U Katz, D Kerszberg, D Khangulyan, B Khelifi, J King, S Klepser, D Klochkov, W Kluźniak, D Kolitzus, Nu Komin, K Kosack, S Krakau, M Kraus, PP Krüger, H Laffon, G Lamanna, J Lau, J-P Lees, J Lefaucheur, V Lefranc, A Lemiere, M Lemoine-Goumard, J-P Lenain, E Leser, T Lohse, M Lorentz, R Liu, R Lopez-Coto, I Lypova, V Marandon, A Marcowith, C Mariaud, R Marx, G Maurin, N Maxted, M Mayer, PJ Meintjes, M Meyer, AMW Mitchell, R Moderski, M Mohamed, L Mohrmann, Knut Morå, E Moulin, T Murach
Publication date
2017/10/1
Journal
Astronomy & Astrophysics
Volume
606
Pages
A59
Publisher
EDP Sciences
Description
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 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.
Scholar articles
H Abdalla, A Abramowski, F Aharonian, FA Benkhali… - Astronomy & Astrophysics, 2017