Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars

Abdalla, H; Abramowski, A; Aharonian, F; Benkhali, F. A.; Akhperjanian, A. G.; Andersson, T; Anguner, E. O.; Arakawa, M; Arrieta, M; Aubert, P; Backes, M; Balzer, A; Barnard, M; Becherini, Y; Tjus, J. B.; Berge, D; Bernhard, S; Bernloehr, K; Blackwell, R; Bottcher, M; Boisson, C; Bolmont, J; Bonnefoy, S; Bordas, P; Bregeon, J; Brun, F; Brun, P; Bryan, M; Buechele, 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; de Wilt, P; Dirson, L; Djannati-Atai, A; Domainko, W; Donath, A; Drury, L. O.; 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; Foerster, A; Funk, S; Fuessling, 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, MA; Katarzynski, K; Katsuragawa, M; Katz, U; Kerszberg, D; Khangulyan, D; Khelifi, B; King, J; Klepser, S; Klochkov, D; Kluzniak, W; Kolitzus, D; Komin, N; Kosack, K; Krakau, S; Kraus, M; Kruger, P. P.; Laffon, H; Lamanna, G; Lau, J; Lees, J. -P.; Lefaucheur, J; Lefranc, V; Lemiere, 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; Mitchell, A. M. W.; Moderski, R; Mohamed, M; Mohrmann, L; Mora, K; Moulin, E; Murach, T; Nakashima, S; de Naurois, M; Niederwanger, F; Niemiec, J; Oakes, L; O'Brien, P; 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; Puehlhofer, G; Punch, M; Quirrenbach, A; Raab, S; Rauth, R; Reimer, A; Reimer, O; Renaud, M; de los Reyes, R; 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; Schussler, F; Schulz, A; Schwanke, U; Schwemmer, S; Seglar-Arroyo, M; Settimo, M; Seyffert, A. S.; Shafi, N; Shilon, I; Simoni, R; Sol, H; Spanier, F; Spengler, G; Spies, F; Stawarz, L; Steenkamp, R; Stegmann, C; Stycz, K; Sushch, I; Takahashi, T; Tavernet, J. -P.; Tavernier, T; Taylor, A. M.; Terrier, R; Tibaldo, L; Tiziani, D; Tluczykont, M; Trichard, C; Tsuji, N; Tuffs, R; Uchiyama, Y; van der Walt, D. J.; van Eldik, C; van Rensburg, C; van Soelen, B; Vasileiadis, G; Veh, J; Venter, C; Viana, A; Vincent, P; Vink, J; Voisin, F; Voelk, HJ; Vuillaume, T; Wadiasingh, Z; Wagner, S. J.; Wagner, P; Wagner, RM; White, R; Wierzcholska, A; Willmann, P; Woernlein, A; Wouters, D; Yang, R; Zaborov, D; Zacharias, M; Zanin, R; Zdziarski, A. A.; Zech, A; Zefi, F; Ziegler, A; Zywucka, N

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Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars

journal contribution

posted on 2018-03-15, 15:04 authored by H Abdalla, A Abramowski, F Aharonian, F. A. Benkhali, A. G. Akhperjanian, T Andersson, E. O. Anguner, M Arakawa, M Arrieta, P Aubert, M Backes, A Balzer, M Barnard, Y Becherini, J. B. Tjus, D Berge, S Bernhard, K Bernloehr, R Blackwell, M Bottcher, C Boisson, J Bolmont, S Bonnefoy, P Bordas, J Bregeon, F Brun, P Brun, M Bryan, M Buechele, T Bulik, M Capasso, J Carr, S Casanova, M Cerruti, N Chakraborty, R. C. G. Chaves, A Chen, J Chevalier, M Coffaro, S Colafrancesco, G Cologna, B Condon, J Conrad, Y Cui, I. D. Davids, J Decock, B Degrange, C Deil, J Devin, P de Wilt, L Dirson, A Djannati-Atai, W Domainko, A Donath, L. O. Drury, K Dutson, J Dyks, T Edwards, K Egberts, P Eger, J. -P. Ernenwein, S Eschbach, C Farnier, S Fegan, M. V. Fernandes, A Fiasson, G Fontaine, A Foerster, S Funk, M Fuessling, S Gabici, Y. A. Gallant, T Garrigoux, G Giavitto, B Giebels, J. F. Glicenstein, D Gottschall, A Goyal, M. -H. Grondin, J Hahn, M Haupt, J Hawkes, G Heinzelmann, G Henri, G Hermann, J. A. Hinton, W Hofmann, C Hoischen, T. L. Holch, M Holler, D Horns, A Ivascenko, H Iwasaki, A Jacholkowska, M Jamrozy, M Janiak, D Jankowsky, F Jankowsky, M Jingo, T Jogler, L Jouvin, I Jung-Richardt, MA Kastendieck, K Katarzynski, M Katsuragawa, U Katz, D Kerszberg, D Khangulyan, B Khelifi, J King, S Klepser, D Klochkov, W Kluzniak, D Kolitzus, N Komin, K Kosack, S Krakau, M Kraus, P. P. Kruger, 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, P. J. Meintjes, M Meyer, A. M. W. Mitchell, R Moderski, M Mohamed, L Mohrmann, K Mora, E Moulin, T Murach, S Nakashima, M de Naurois, F Niederwanger, J Niemiec, L Oakes, P O'Brien, H Odaka, S Ohm, M Ostrowski, I Oya, M Padovani, M Panter, R. D. Parsons, N. W. Pekeur, G Pelletier, C Perennes, P-O Petrucci, B Peyaud, Q Piel, S Pita, H Poon, D Prokhorov, H Prokoph, G Puehlhofer, M Punch, A Quirrenbach, S Raab, R Rauth, A Reimer, O Reimer, M Renaud, R de los Reyes, S Richter, F Rieger, C Romoli, G Rowell, B Rudak, C. B. Rulten, V Sahakian, S Saito, D Salek, D. A. Sanchez, A Santangelo, M Sasaki, R Schlickeiser, F Schussler, A Schulz, U Schwanke, S Schwemmer, M Seglar-Arroyo, M Settimo, A. S. Seyffert, N Shafi, I Shilon, R Simoni, H Sol, F Spanier, G Spengler, F Spies, L Stawarz, R Steenkamp, C Stegmann, K Stycz, I Sushch, T Takahashi, J. -P. Tavernet, T Tavernier, A. M. Taylor, R Terrier, L Tibaldo, D Tiziani, M Tluczykont, C Trichard, N Tsuji, R Tuffs, Y Uchiyama, D. J. van der Walt, C van Eldik, C van Rensburg, B van Soelen, G Vasileiadis, J Veh, C Venter, A Viana, P Vincent, J Vink, F Voisin, HJ Voelk, T Vuillaume, Z Wadiasingh, S. J. Wagner, P Wagner, RM Wagner, R White, A Wierzcholska, P Willmann, A Woernlein, D Wouters, R Yang, D Zaborov, M Zacharias, R Zanin, A. A. Zdziarski, A Zech, F Zefi, A Ziegler, N Zywucka

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 to determine. An EBL-model independent measurement of the EBL SED with the H.E.S.S. array of Cherenkov telescopes is presented. It is 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

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Astronomy and Astrophysics, 2017, 606, A59, p 11

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/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

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AM (Accepted Manuscript)

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Astronomy and Astrophysics

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EDP Sciences

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0004-6361

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1432-0746

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2017

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2018-03-15

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https://doi.org/10.1051/0004-6361/201731200

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https://www.aanda.org/articles/aa/abs/2017/10/aa31200-17/aa31200-17.html

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en

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https://leicester.figshare.com/account/articles/10218608

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Science & Technology Physical Sciences Astronomy & Astrophysics gamma rays: galaxies BL Lacertae objects: general cosmic background radiation infrared: diffuse background EXTRAGALACTIC BACKGROUND LIGHT ACTIVE GALACTIC NUCLEI ELLIPTIC GALAXIES RADIATION-FIELDS LIMITS OBJECTS MARKARIAN-421 EVOLUTION REDSHIFT UNIVERSE

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Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars

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