Correlation of the highest-energy cosmic rays with nearby extragalactic
objects

Abraham, J; Abreu, P; Aglietta, M; Aguirre, C; Allard, D; Allekotte, I; Allen, J; Allison, P; Alvarez, C; Alvarez Muniz, J; Ambrosio, M; Anchordoqui, L; Andringa, S; Anzalone, A; Aramo, C; Argiro, S; Arisaka, K; Armengaud, E; Arneodo, F; Arqueros, F; Asch, T; Asorey, H; Assis, P; Atulugama, Bs; Aublin, J; Ave, M; Avila, G; Backer, T; Badagnani, D; Barbosa, Af; Barnhill, D; Barroso, Slc; Bauleo, P; Beatty, J; Beau, T; Becker, Br; Becker, Kh; Bellido, Ja; BenZvi, S; Berat, C; Bergmann, T; Bernardini, P; Bertou, X; Biermann, Pl; Billoir, P; Blanch Bigas, O; Blanco, F; Blasi, P; Bleve, C; Blumer, H; Bohacova, M; Bonifazi, C; Bonino, R; Boratav, M; Brack, J; Brogueira, P; Brown, Wc; Buchholz, P; Bueno, A; Busca, Ng; Caballero Mora KS,; Cai, B; Camin, Dv; Caruso, Rossella; Carvalho, W; Castellina, A; Catalano, O; Cataldi, G; Cazon Boado, L; Cester, R; Chauvin, J; Chiavassa, A; Chinellato, Ja; Chou, A; Chye, J; Clark, Pdj; Clay, Rw; Colombo, E; Conceicao, R; Connolly, B; Contreras, F; Coppens, J; 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Galicia, Jfv; Valino, I; Valore, L; van den Berg AM,; van Elewyck, V; Vazquez, Ra; Veberic, D; Veiga, A; Velarde, A; Venters, T; Verzi, V; Videla, M; Villasenor, L; Vorobiov, S; Voyvodic, L; Wahlberg, H; Wainberg, O; Waldenmaier, T; Walker, P; Warner, D; Watson, Aa; Westerhoff, S; Wieczorek, G; Wiencke, L; Wilczynska, B; Wilczynski, H; Wileman, C; Winnick, Mg; Wu, H; Wundheiler, B; Xu, J; Yamamoto, T; Younk, P; Zas, E; Zavrtanik, D; Zavrtanik, M; Zech, A; Zepeda, A; Ziolkowski, M.

doi:10.1126/science.1151124

Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 x 10(19) electron volts and the positions of active galactic nuclei (AGN) lying within similar to 75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these cosmic rays with at least a 99% confidence level from a prescribed a priori test. The correlation we observed is compatible with the hypothesis that the highest-energy particles originate from nearby extragalactic sources whose flux has not been substantially reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.

Titolo:	Correlation of the highest-energy cosmic rays with nearby extragalactic objects
Autori interni:	Abraham J Abreu P Aglietta M Aguirre C Allard D Allekotte I Allen J Allison P Alvarez C Alvarez Muniz J Ambrosio M Anchordoqui L Andringa S Anzalone A Aramo C Argiro S Arisaka K Armengaud E Arneodo F Arqueros F Asch T Asorey H Assis P Atulugama BS Aublin J Ave M Avila G Backer T Badagnani D Barbosa AF Barnhill D Barroso SLC Bauleo P Beatty J Beau T Becker BR Becker KH Bellido JA BenZvi S Berat C Bergmann T Bernardini P Bertou X Biermann PL Billoir P Blanch Bigas O Blanco F Blasi P Bleve C Blumer H Bohacova M Bonifazi C Bonino R Boratav M Brack J Brogueira P Brown WC Buchholz P Bueno A Busca NG Caballero Mora KS Cai B Camin DV CARUSO, ROSSELLA Carvalho W Castellina A Catalano O Cataldi G Cazon Boado L Cester R Chauvin J Chiavassa A Chinellato JA Chou A Chye J Clark PDJ Clay RW Colombo E Conceicao R Connolly B Contreras F Coppens J Cordier A Cotti U Coutu S Covault CE Creusot A Cronin J Dagoret Campagne S Daumiller K Dawson BR de Almeida RM De Donato C de Jong SJ De la Vega G de Mello JM de Mello JRT De Mitri I de Souza V del Peral L Deligny O Della Selva A Delle Fratte C Dembinski H Di Giulio C Diaz JC Dobrigkeit C D'Olivo JC Dornic D Dorofeev A dos Anjos JC Dova MT D'Urso D DuVernois MA Engel R Epele L Erdmann M Escobar CO Etchegoyen A San Luis PF Falcke H Farrar G Fauth AC Fazzini N Fernandez A Farrar G Fauth AC Fazzini N Fernandez A Ferrer F Ferry S Fick B Filevich A Filipcic A Fleck I Fonte R Fracchiolla CE Fulgione W Garcia B Gamez DG Garcia Pinto D Garrido X Geenen H Gelmini G Gemmeke H Ghia PL Giller M Glass H Gold MS Golup G Albarracin FG Berisso MG Herrero RG Goncalves P do Amaral MG Gonzalez D Gonzalez JG Gonzalez M Gora D Gorgi A Gouffon P Grassi V Grillo A Grunfeld C Guardincerri Y Guarino F Guedes GP Gutierrez J Hague JD Hamilton JC Hansen P Harari D Harmsma S Harton JL Haungs A Hauschildt T Healy MD Hebbeker T Heck D Hojvat C Holmes VC Homola P Horandel J Horneffer A Horvat M Hrabovsky M Huege T Iarlori M INSOLIA, Antonio Ionita F Italiano A Kaducak M Kampert KH Keilhauer B Kemp E Kieckhafer RM Klages HO Kleifges M Kleinfeller J Knapik R Knapp J Koang DH Kopmann A Krieger A Kromer D Kumpel D Kunka N Kusenko A La Rosa G Lachaud C Lago BL Lebrun D LeBrun P Lee J Leigui de Oliveira MA Letessier Selvon A Leuthold M Lhenry Yvon I Lopez R Aguera AL Bahilo JL Maccarone MC Macolino C Maldera S Malek M Mancarella G Mancenido ME Mandat D Mantsch P Mariazzi AG Maris IC Martello D Martinez J Bravo OM Mathes HJ Matthiae G Maurizio D Mazur PO McCauley T McEwen M McNeil RR Medina MC Medina Tanco G Meli A Melo D Menichetti E Menschikov A Meurer C Meyhandan R Micheletti MI Miele G Miller W Mollerach S Monasor M Ragaigne DM Montanet F Morales B Morello C Moreno E Moreno JC Morris C Mostafa M Muller MA Mussa R Navarra G Navarro JL Navas S Nellen L Newman Holmes C Newton D Thi TN Nierstenhofer N Nitz D Nosek D Nozka L Oehlschlager J Ohnuki T Olinto A Olmos Gilbaja VM Ortiz M Ostapchenko S Otero L Selmi Dei DP Palatka M Pallotta J Parente G Parizot E Parlati S Pastor S Patel M Paul T Pavlidou V Payet K Pech M Pekala J Pelayo R Pepe IM Perrone L Petrera S Petrinca P Petrov Y Ngoc DP Ngoc DP Thi TNP Pichel A Piegaia R Pierog T Pimenta M Pinto T PIRRONELLO, Valerio Pisanti O Platino M Pochon J Porter TA Privitera P Prouza M Quel EJ Rautenberg J Reucroft S Revenu B Rezende FAS Ridky J Riggi S Risse M Riviere C Rizi V Roberts M Robledo C Rodriguez G Frias D Martino JR Rojo JR Rodriguez Cabo I Ros G Rosado J Roth M Rouille d'Orfeuil B Roulet E Rovero AC Salamida F Salazar H Salina G Sanchez F Santander M Santo CE Santos EM Sarazin F Sarkar S Sato R Scherini V Schieler H Schmidt F Schmidt T Scholten O Schovanek P Schussler F Sciutto SJ Scuderi M Segreto A Semikoz D Settimo M Shellard RC Sidelnik I Siffert BB Sigl G De Grande NS Smialkowski A Smida R Smith AGK Smith BE Snow GR Sokolsky P Sommers P Sorokin J Spinka H Squartini R Strazzeri E Stutz A Suarez F Suomijarvi T Supanitsky AD Sutherland MS Swain J Szadkowski Z Takahashi J Tamashiro A Tamburro A Tascau O Tcaciuc R Thomas D Ticona R Tiffenberg J Timmermans C Tkaczyk W Peixoto CJ Tome B Tonachini A Torresi D Travnicek P Tripathi A Tristram G Tscherniakhovski D Tueros M Tunnicliffe V Ulrich R Unger M Urban M Galicia JFV Valino I Valore L van den Berg AM van Elewyck V Vazquez RA Veberic D Veiga A Velarde A Venters T Verzi V Videla M Villasenor L Vorobiov S Voyvodic L Wahlberg H Wainberg O Waldenmaier T Walker P Warner D Watson AA Westerhoff S Wieczorek G Wiencke L Wilczynska B Wilczynski H Wileman C Winnick MG Wu H Wundheiler B Xu J Yamamoto T Younk P Zas E Zavrtanik D Zavrtanik M Zech A Zepeda A Ziolkowski M. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2007
Rivista:	SCIENCE
Handle:	http://hdl.handle.net/20.500.11769/6444
Appare nelle tipologie:	1.1 Articolo in rivista

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