An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory
Abraham, J; Aglietta, M; Aguirre, C; Allard, D; Allekotte, I; Allison, P; Alvarez, C; Alvarez-Muñiz, J; Ambrosio, M; Anchordoqui, L; Anjos, J; Aramo, C; Arisaka, K; Armengaud, E; Arneodo, F; Arqueros, F; Asch, T; Asorey, H; Atulugama, B; Aublin, J; Avila, G; Bacelar, J; Bäcker, T; Badagnani, D; Barbosa, A; Barbosa, H; Barkhausen, M; Barnhill, D; Barroso, S; Bauleo, P; Beatty, J; Beau, T; Becker, B; Becker, K; Bellido, J; BenZvi, S; Berat, C; Bergmann, T; Bernardini, P; Bertou, X; Biermann, P; Billoir, P; Blanch-Bigas, O; Blanco, F; Blasi, P; Blümer, H; Boghrat, P; Boháčová, M; Bonifazi, C; Bonino, R; Boratav, M; Brack, J; Brunet, J; Buchholz, P; Busca, N; Caballero-Mora, K; Cai, B; Camin, D; Capdevielle, J; Caruso, R; Castellina, A; Cataldi, G; Cazón, L; Cester, R; Chauvin, J; Chiavassa, A; Chinellato, J; Chou, A; Chye, J; Claes, D; Clark, P; Clay, R; Clay, S; Connolly, B; Cordier, A; Cotti, U; Coutu, S; Covault, C; Cronin, J; Dagoret-Campagne, S; Quang, T; Darriulat, P; Daumiller, K; Dawson, B; Almeida, R; Carvalho, L; Donato, C; Jong, S; Mello, W; Mitri, I; Oliveira, M; Souza, V; Peral, L; Deligny, O; Selva, A; Fratte, C; Dembinski, H; Giulio, C; Diaz, J; Dobrigkeit, C; D’Olivo, J; Dornic, D; Dorofeev, A; Dova, M; D’Urso, D; DuVernois, M; Engel, R; Epele, L; Erdmann, M; Escobar, C; Etchegoyen, A; Ewers, A; Luis, P; Falcke, H; Fauth, A; Fazio, D; Fazzini, N; Fernández, A; Ferrer, F; Ferry, S; Fick, B; Filevich, A; Filipčič, A; Fleck, I; Fokitis, E; Fonte, R; Fuhrmann, D; Fulgione, W; García, B; Garcia-Pinto, D; Garrard, L; Garrido, X; Geenen, H; Gelmini, G; Gemmeke, H; Geranios, A; Ghia, P; Giller, M; Gitto, J; Glass, H; Gobbi, F; Gold, M; Albarracin, F; Berisso, M; Herrero, R; Amaral, M; Gongora, J; Gonzalez, D; Gonzalez, J; González, M; Góra, D; Gorgi, A; Gouffon, P; Grassi, V; Grillo, A; Grunfeld, C; Grupen, C; Guarino, F; Guedes, G; Gutiérrez, J; Hague, J; Hamilton, J; Harakeh, M; Harari, D; Harmsma, S; Hartmann, S; Harton, J; Healy, M; Hebbeker, T; Heck, D; Hojvat, C; Homola, P; Hörandel, J; Horneffer, A; Horvat, M; Hrabovský, M; Iarlori, M; Insolia, A; Kaducak, M; Kalashev, O; Kampert, K; Keilhauer, B; Kemp, E; Klages, H; Kleifges, M; Kleinfeller, J; Knapik, R; Knapp, J; Koang, D; Kolotaev, Y; Kopmann, A; Krömer, O; Kuhlman, S; Kuijpers, J; Kunka, N; Kusenko, A; Lachaud, C; Lago, B; Lebrun, D; LeBrun, P; Lee, J; Letessier-Selvon, A; Leuthold, M; Lhenry-Yvon, I; Longo, G; López, R; Agüera, A; Lucero, A; Maldera, S; Malek, M; Maltezos, S; Mancarella, G; Manceñido, M; Mandat, D; Mantsch, P; Mariazzi, A; Maris, I; Martello, D; Martinez, N; Martínez, J; Martínez, O; Mathes, H; Matthews, J; Matthiae, G; Maurin, G; Maurizio, D; Mazur, P; McCauley, T; McEwen, M; McNeil, R; Medina, G; Medina, M; Tanco, G; Meli, A; Melo, D; Menichetti, E; Menshikov, A; Meurer, C; Meyhandan, R; Micheletti, M; Miele, G; Miller, W; Mollerach, S; Monasor, M; Ragaigne, D; Montanet, F; Morales, B; Morello, C; Moreno, E; Morris, C; Mostafá, M; Muller, M; Mussa, R; Navarra, G; Nellen, L; Newman-Holmes, C; Newton, D; Thi, T; Nichol, R; Nierstenhöfer, N; Nitz, D; Nogima, H; Nosek, D; Nožka, L; Oehlschläger, J; Ohnuki, T; Olinto, A; Oliveira, L; Olmos-Gilbaja, V; Ortiz, M; Ostapchenko, S; Otero, L; Palatka, M; Pallotta, J; Parente, G; Parizot, E; Parlati, S; Patel, M; Paul, T; Payet, K; Pech, M; Pelayo, R; Pepe, I; Perrone, L; Petrera, S; Petrinca, P; Petrov, Y; Ngoc, D; Thi, T; Piegaia, R; Pierog, T; Pisanti, O; Porter, T; Pouryamout, J; Prado, L; Privitera, P; Prouza, M; Quel, E; Rautenberg, J; Reis, H; Reucroft, S; Revenu, B; Řídký, J; Risi, A; Risse, M; Rivière, C; Rizi, V; Robbins, S; Roberts, M; Robledo, C; Rodriguez, G; Frías, D; Martino, J; Rojo, J; Ros, G; Rosado, J; Roth, M; Roucelle, C; Rouillé-d’Orfeuil, B; Roulet, E; Rovero, A; Salamida, F; Salazar, H; Salina, G; Sánchez, F; Santander, M; Santos, E; Sarkar, S; Sato, R; Scherini, V; Schmidt, T; Scholten, O; Schovánek, P; Schüssler, F; Sciutto, S; Scuderi, M; Semikoz, D; Sequeiros, G; Shellard, R; Siffert, B; Sigl, G; Skelton, P; Slater, W; Grande, N; Smiałkowski, A; Šmída, R; Smith, B; Snow, G; Sokolsky, P; Sommers, P; Sorokin, J; Spinka, H; Strazzeri, E; Stutz, A; Suarez, F; Suomijärvi, T; Supanitsky, A; Swain, J; Szadkowski, Z; Tamashiro, A; Tamburro, A; Tascau, O; Ticona, R; Timmermans, C; Tkaczyk, W; Peixoto, C; Tonachini, A; Torresi, D; Travnicek, P; Tripathi, A; Tristram, G; Tscherniakhovski, D; Tueros, M; Tunnicliffe, V; Ulrich, R; Unger, M; Urban, M; Galicia, J; Valiño, I; Valore, L; Berg, A; Elewyck, V; Vazquez, R; Veberič, D; Veiga, A; Velarde, A; Venters, T; Verzi, V; Videla, M; Villaseñor, L; Van, T; Vorobiov, S; Voyvodic, L; Wahlberg, H; Wainberg, O; Waldenmaier, T; Walker, P; Warner, D; Watson, A; Westerhoff, S; Wiebusch, C; Wieczorek, G; Wiencke, L; Wilczyńska, B; Wilczyński, H; Wileman, C; Winnick, M; Xu, J; Yamamoto, T; Younk, P; Zas, E; Zavrtanik, D; Zavrtanik, M; Zech, A; Zepeda, A; Zha, M; Ziolkowski, M
Date:
2007
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