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

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal , Other literature type 01 Oct 2017Embargo end date: 01 Jan 2017 France, France, France, Germany, United Kingdom, Netherlands, Germany, France, France, France, France, France, Germany, Italy, Germany, France, France, France, France, France, France, Poland, France Publisher:EDP SciencesJournal:Astronomy & Astrophysics, volume 606, page A59 (issn: 0004-6361, eissn: 1432-0746,

Authors: Collaboration, H. E. S. S.; Abdalla, H.; Abramowski, A.; Aharonian, F.; Benkhali, F. Ait; Akhperjaniany, A. G.; Andersson, T.; +193 Authors

Collaboration, H. E. S. S.; Abdalla, H.; Abramowski, A.; Aharonian, F.; Benkhali, F. Ait; Akhperjaniany, A. G.; Andersson, T.; Angüner, E. O.; Arakawa, M.; Arrieta, M.; Aubert, P.; Backes, M.; Balzer, A.; Barnard, M.; Becherini, Y.; Tjus, J. Becker; Berge, D.; Bernhard, S.; Bernlöhr, K.; Blackwell, R.; Böttcher, M.; Boisson, C.; Bolmont, J.; Bonnefoy, S.; Bordas, P.; Bregeon, J.; Brun, F.; Brun, P.; Bryan, M.; Büchele, M.; Bulik, T.; Capasso, M.; Carr, J.; Casanova, S.; Cerruti, M.; Chakraborty, N.; Chaves, R. C. G.; Chen, A.; Chevalier, J.; Coffaro, M.; Colafrancesco, S.; Cologna, G.; Condon, B.; Conrad, J.; Cui, Y.; Davids, I. D.; Decock, J.; Degrange, B.; Deil, C.; Devin, J.; deWilt, P.; Dirson, L.; Djannati-Ataï, A.; Domainko, W.; Donath, A.; Drury, L. O. C.; Dutson, K.; Dyks, J.; Edwards, T.; Egberts, K.; Eger, P.; Ernenwein, J. P.; Eschbach, S.; Farnier, C.; Fegan, S.; Fernandes, M. V.; Fiasson, A.; Fontaine, G.; Förster, A.; Funk, S.; Füßling, M.; Gabici, S.; Gallant, Y. A.; Garrigoux, T.; Giavitto, G.; Giebels, B.; Glicenstein, J. F.; Gottschall, D.; Goyal, A.; Grondin, M. H.; Hahn, J.; Haupt, M.; Hawkes, J.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Horns, D.; Ivascenko, A.; Iwasaki, H.; Jacholkowska, A.; Jamrozy, M.; Janiak, M.; Jankowsky, D.; Jankowsky, F.; Jingo, M.; Jogler, T.; Jouvin, L.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzynski, K.; Katsuragawa, M.; Katz, U.; Kerszberg, D.; Khangulyan, D.; Khélifi, B.; King, J.; Klepser, S.; Klochkov, D.; Kluzniak, W.; Kolitzus, D.; Komin, Nu.; Kosack, K.; Krakau1, S.; Kraus, M.; Krüger, P. P.; Laffon, H.; Lamanna, G.; Lau, J.; Lees, J. P.; Lefaucheur, J.; Lefranc, V.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. P.; Leser, E.; Lohse, T.; Lorentz, M.; Liu, R.; Lopez-Coto, R.; Lypova, I.; Marandon, V.; Marcowith, A.; Mariaud, C.; Marx, R.; Maurin, G.; Maxted, N.; Mayer, M.; Meintjes, P. J.; Meyer, M.; Mitchel, A. M. W.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Morå, K.; Moulin, E.; Murach, T.; Nakashima, S.; de Naurois, M.; Niederwanger, F.; Niemiec, J.; Oakes, L.; Brien, P. O; Odaka, H.; Ohm, S.; Ostrowski, M.; Oya, I.; Padovani, M.; Panter, M.; Parsons, R. D.; Pekeur, N. W.; Pelletier, G.; Perennes, C.; Petrucci, P. O.; Peyaud, B.; Piel, Q.; Pita, S.; Poon, H.; Prokhorov, D.; Prokoph, H.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Raab, S.; Rauth, R.; Reimer, A.; Reimer, O.; Renaud, M.; Reyes, R. de los; Richter, S.; Rieger, F.; Romoli, C.; Rowell, G.; Rudak, B.; Rulten, C. B.; Sahakian, V.; Saito, S.; Salek, D.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Schlickeiser, R.; Schüssler, F.; Schulz, A.; Schwanke, U.; Schwemmer, S.;

doi: 10.1051/0004-6361/201731200 , 10.48550/arxiv.1707.06090

arXiv: http://arxiv.org/abs/1707.06090 , 1707.06090

handle: 11245.1/53e4dafd-4c52-48e4-bba8-663b8a554167 , 2381/41332 , 10900/87764

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

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Abstract

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.

Countries

France, France, France, Germany, United Kingdom, Netherlands, Germany, France, France, France, France, France, Germany, Italy, Germany, France, France, France, France, France, France, Poland, France

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Keywords

blazar: spectrum, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], VHE [gamma ray], UNIVERSE, cosmic background radiation, MARKARIAN-421, LIMITS, HESS, propagation, transparency, High Energy Astrophysical Phenomena (astro-ph.HE), galaxies — Cosmology: cosmic background radiation Send offprint requests to: HESS collaboration [Gamma rays], photon, 520, spectrum [blazar], Physical Sciences, galaxies [gamma rays], OBJECTS, Astrophysics - High Energy Astrophysical Phenomena, signature, Astrophysics - Cosmology and Nongalactic Astrophysics, ACTIVE GALACTIC NUCLEI, Cosmology and Nongalactic Astrophysics (astro-ph.CO), RADIATION-FIELDS, REDSHIFT, energy spectrum, FOS: Physical sciences, Astronomy & Astrophysics, 530, horizon, ELLIPTIC GALAXIES, diffuse background [infrared], gamma rays: galaxies, electron positron, Science & Technology, general [BL Lacertae objects], background, Institut für Physik und Astronomie, BL Lacertae objects: general, Gamma rays: galaxies — Cosmology: cosmic background radiation Send offprint requests to: HESS collaboration, infrared: diffuse background, EVOLUTION, EXTRAGALACTIC BACKGROUND LIGHT, Cherenkov counter, gamma ray: VHE, spectral, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], absorption, ddc: ddc:520

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