The energy spectrum of cosmic rays beyond the turn-down around 10(17) eV as measured with the surface detector of the Pierre Auger Observatory

Author(s):Show less -

Abreu, P. ^{[1, 2, 3]} ; Aglietta, M. ^{[4, 5]} ; Albury, J. M. ^[6] ; Allekotte, I. ^{[3, 7]} ; Almela, A. ^{[8, 9]} ; Alvarez-Muniz, J. ^[10] ; Alves Batista, R. ^[11] ; Anastasi, G. A. ^{[4, 12]} ; Anchordoqui, L. ^[13] ; Andrada, B. ^[8] ; Andringa, S. ^{[1, 2]} ; Aramo, C. ^[14] ; Araujo Ferreira, P. R. ^[15] ; Arteaga Velazquez, J. C. ^[16] ; Asorey, H. ^[8] ; Assis, P. ^{[1, 2]} ; Avila, G. ^[17] ; Badescu, A. M. ^[18] ; Bakalova, A. ^[19] ; Balaceanu, A. ^[20] ; Barbato, F. ^{[21, 22]} ; Barreira Luz, R. J. ^{[1, 2]} ; Becker, K. H. ^[23] ; Bellido, J. A. ^{[6, 24]} ; Berat, C. ^[25] ; Bertaina, M. E. ^{[4, 12]} ; Bertou, X. ^{[3, 7]} ; Biermann, P. L. ^[26] ; Billoir, P. ^[27] ; Binet, V. ^{[28, 29]} ; Bismark, K. ^{[8, 30]} ; Bister, T. ^[15] ; Biteau, J. ^[31] ; Blazek, J. ^[19] ; Bleve, C. ^[25] ; Bohacova, M. ^[19] ; Boncioli, D. ^{[21, 32]} ; Bonifazi, C. ^[33] ; Bonneau Arbeletche, L. ^[34] ; Borodai, N. ^[35] ; Botti, A. M. ^[8] ; Brack, J. ^[36] ; Bretz, T. ^[15] ; Brichetto Orchera, P. G. ^[8] ; Briechle, F. L. ^[15] ; Buchholz, P. ^[37] ; Bueno, A. ^[38] ; Buitink, S. ^[39] ; Buscemi, M. ^[40] ; Busken, M. ^{[8, 30]} ; Caballero-Mora, K. S. ^[41] ; Caccianiga, L. ^{[42, 43]} ; Canfora, F. ^{[11, 44]} ; Caracas, I. ^[23] ; Carceller, J. M. ^[38] ; Caruso, R. ^{[45, 40]} ; Castellina, A. ^{[4, 5]} ; Catalani, F. ^[46] ; Cataldi, G. ^[47] ; Cazon, L. ^{[1, 2]} ; Cerda, M. ^[48] ; Chinellato, J. A. ^[49] ; Chudoba, J. ^[19] ; Chytka, L. ^[50] ; Clay, R. W. ^[6] ; Cobos Cerutti, A. C. ^[51] ; Colalillo, R. ^{[14, 52]} ; Coleman, A. ^[53] ; Coluccia, M. R. ^[47] ; Conceicao, R. ^{[1, 2]} ; Condorelli, A. ^{[21, 22]} ; Consolati, G. ^{[43, 54]} ; Contreras, F. ^[17] ; Convenga, F. ^{[47, 55]} ; Correia dos Santos, D. ^[56] ; Covault, C. E. ^[57] ; Dasso, S. ^{[58, 59, 60, 61]} ; Daumiller, K. ^[62] ; Dawson, B. R. ^[6] ; Day, J. A. ^[6] ; de Almeida, R. M. ^[56] ; de Jesus, J. ^{[8, 62]} ; de Jong, S. J. ^{[11, 44]} ; De Mauro, G. ^{[11, 44]} ; de Mello Neto, J. R. T. ^{[33, 63]} ; De Mitri, I. ^{[21, 22]} ; de Oliveira, J. ^[64] ; de Oliveira Franco, D. ^[49] ; de Palma, F. ^{[47, 55]} ; de Souza, V. ^[65] ; De Vito, E. ^{[47, 55]} ; del Rio, M. ^[17] ; Deligny, O. ^[31] ; Di Matteo, A. ^[4] ; Dobrigkeit, C. ^[49] ; D'Olivo, J. C. ^[66] ; Domingues Mendes, L. M. ^{[1, 2]} ; dos Anjos, R. C. ^[67] ; dos Santos, D. ^[56] ; Dova, M. T. ^{[68, 69]} ; Ebr, J. ^[19] ; Engel, R. ^{[62, 30]} ; Epicoco, I. ^{[47, 55]} ; Erdmann, M. ^[15] ; Escobar, C. O. ^[70] ; Etchegoyen, A. ^{[8, 9]} ; Falcke, H. ^{[11, 71, 44]} ; Farmer, J. ^[72] ; Farrar, G. ^[73] ; Fauth, A. C. ^[49] ; Fazzini, N. ^[70] ; Feldbusch, F. ^[74] ; Fenu, F. ^{[4, 5]} ; Fick, B. ^[75] ; Figueira, J. M. ^[8] ; Filipcic, A. ^{[76, 77]} ; Fitoussi, T. ^[62] ; Fodran, T. ^[11] ; Freire, M. M. ^{[28, 29]} ; Fujii, T. ^{[72, 78, 79]} ; Fuster, A. ^{[8, 9]} ; Galea, C. ^[11] ; Galelli, C. ^{[42, 43]} ; Garcia, B. ^[51] ; Garcia Vegas, A. L. ^[15] ; Gemmeke, H. ^[74] ; Gesualdi, F. ^{[8, 62]} ; Gherghel-Lascu, A. ^[20] ; Ghia, P. L. ^[31] ; Giaccari, U. ^[11] ; Giammarchi, M. ^[43] ; Glombitza, J. ^[15] ; Gobbi, F. ^[48] ; Gollan, F. ^[8] ; Golup, G. ^{[3, 7]} ; Gomez Berisso, M. ^{[3, 7]} ; Gomez Vitale, P. F. ^[17] ; Gongora, J. P. ^[17] ; Gonzalez, J. M. ^{[3, 7]} ; Gonzalez, N. ^[80] ; Goos, I. ^{[62, 3, 7]} ; Gora, D. ^[35] ; Gorgi, A. ^{[4, 5]} ; Gottowik, M. ^[23] ; Grubb, T. D. ^[6] ; Guarino, F. ^{[14, 52]} ; Guedes, G. P. ^[81] ; Guido, E. ^{[4, 12]} ; Hahn, S. ^{[8, 62]} ; Hamal, P. ^[19] ; Hampel, M. R. ^[8] ; Hansen, P. ^{[68, 69]} ; Harari, D. ^{[3, 7]} ; Harvey, V. M. ^[6] ; Haungs, A. ^[62] ; Hebbeker, T. ^[15] ; Heck, D. ^[62] ; Hill, G. C. ^[6] ; Hojvat, C. ^[70] ; Horandel, J. R. ^{[11, 44]} ; Horvath, P. ^[50] ; Hrabovsky, M. ^[50] ; Huege, T. ^{[39, 62]} ; Insolia, A. ^{[45, 40]} ; Isar, P. G. ^[82] ; Janecek, P. ^[19] ; Johnsen, J. A. ^[83] ; Jurysek, J. ^[19] ; Kaeaepae, A. ^[23] ; Kampert, K. H. ^[23] ; Karastathis, N. ^[62] ; Keilhauer, B. ^[62] ; Kemp, J. ^[15] ; Khakurdikar, A. ^[11] ; Kizakke Covilakam, V. V. ^{[8, 62]} ; Klages, H. O. ^[62] ; Kleifges, M. ^[74] ; Kleinfeller, J. ^[48] ; Koepke, M. ^[30] ; Kunka, N. ^[74] ; Lago, B. L. ^[84] ; Lang, R. G. ^[65] ; Langner, N. ^[15] ; Leigui de Oliveira, M. A. ^[85] ; Lenok, V. ^[62] ; Letessier-Selvon, A. ^[27] ; Lhenry-Yvon, I. ^[31] ; Lo Presti, D. ^{[45, 40]} ; Lopes, L. ^{[1, 2]} ; Lopez, R. ^[86] ; Lu, L. ^[87] ; Luce, Q. ^[30] ; Lundquist, J. P. ^[77] ; Machado Payeras, A. ^[49] ; Mancarella, G. ^{[47, 55]} ; Mandat, D. ^[19] ; Manning, B. C. ^[6] ; Manshanden, J. ^[88] ; Mantsch, P. ^[70] ; Marafico, S. ^[31] ; Mariazzi, A. G. ^{[68, 69]} ; Maris, I. C. ^[80] ; Marsella, G. ^{[40, 89]} ; Martello, D. ^{[47, 55]} ; Martinelli, S. ^{[8, 62]} ; Martinez, H. ^[65] ; Martinez Bravo, O. ^[86] ; Mastrodicasa, M. ^{[21, 32]} ; Mathes, H. J. ^[62] ; Matthews, J. ^[90] ; Matthiae, G. ^{[91, 92]} ; Mayotte, E. ^[23] ; Mazur, P. O. ^[70] ; Medina-Tanco, G. ^[66] ; Melo, D. ^[8] ; Menshikov, A. ^[74] ; Merenda, K. -d. ^[83] ; Michal, S. ^[50] ; Micheletti, M. I. ^{[28, 29]} ; Miramonti, L. ^{[42, 43]} ; Mockler, D. ^{[80, 30]} ; Mollerach, S. ^{[3, 7]} ; Montanet, F. ^[25] ; Morello, C. ^{[4, 5]} ; Mostafa, M. ^[93] ; Muller, A. L. ^[8] ; Muller, M. A. ^[49] ; Mulrey, K. ^[39] ; Mussa, R. ^[4] ; Muzio, M. ^[73] ; Namasaka, W. M. ^[23] ; Nasr-Esfahani, A. ^[23] ; Nellen, L. ^[66] ; Niculescu-Oglinzanu, M. ^[20] ; Niechciol, M. ^[37] ; Nitz, D. ^[75] ; Nosek, D. ^[94] ; Novotny, V. ^[94] ; Nozka, L. ^[50] ; Nucita, A. ^{[47, 55]} ; Nunez, L. A. ^[95] ; Palatka, M. ^[19] ; Pallotta, J. ^{[96, 97]} ; Papenbreer, P. ^[23] ; Parente, G. ^[10] ; Parra, A. ^[86] ; Pawlowsky, J. ^[23] ; Pech, M. ^[19] ; Pedreira, F. ^[10] ; Pekala, J. ^[35] ; Pelayo, R. ^[98] ; Pena-Rodriguez, J. ^[95] ; Pereira Martins, E. E. ^{[8, 30]} ; Perez Armand, J. ^[34] ; Perez Bertolli, C. ^{[8, 62]} ; Perlin, M. ^{[8, 62]} ; Perrone, L. ^{[47, 55]} ; Petrera, S. ^{[21, 22]} ; Pierog, T. ^[62] ; Pimenta, M. ^{[1, 2]} ; Pirronello, V. ^{[45, 40]} ; Platino, M. ^[8] ; Pont, B. ^[11] ; Pothast, M. ^{[11, 44]} ; Privitera, P. ^[72] ; Prouza, M. ^[19] ; Puyleart, A. ^[75] ; Querchfeld, S. ^[23] ; Rautenberg, J. ^[23] ; Ravignani, D. ^[8] ; Reininghaus, M. ^{[8, 62]} ; Ridky, J. ^[19] ; Riehn, F. ^{[1, 2]} ; Risse, M. ^[37] ; Rizi, V. ^{[21, 32]} ; Rodrigues de Carvalho, W. ^[34] ; Rodriguez Rojo, J. ^[17] ; Roncoroni, M. J. ^[8] ; Roth, M. ^[62] ; Roulet, E. ^{[3, 7]} ; Rovero, A. C. ^[59] ; Ruehl, P. ^[37] ; Saffi, S. J. ^[6] ; Saftoiu, A. ^[20] ; Salamida, F. ^{[21, 32]} ; Salazar, H. ^[86] ; Salina, G. ^[92] ; Sanabria Gomez, J. D. ^[95] ; Sanchez, F. ^[8] ; Santos, E. M. ^[34] ; Santos, E. ^[19] ; Sarazin, F. ^[83] ; Sarmento, R. ^{[1, 2]} ; Sarmiento-Cano, C. ^[8] ; Sato, R. ^[17] ; Savina, P. ^{[47, 55, 31]} ; Schaefer, C. M. ^[62] ; Scherini, V. ^[47] ; Schieler, H. ^[62] ; Schimassek, M. ^{[8, 30]} ; Schimp, M. ^[23] ; Schluter, F. ^{[8, 62]} ; Schmidt, D. ^[30] ; Scholten, O. ^{[39, 99]} ; Schovanek, P. ^[19] ; Schroeder, F. G. ^{[62, 53]} ; Schroeder, S. ^[23] ; Schulte, J. ^[15] ; Schulz, A. ^[30] ; Sciutto, S. J. ^{[68, 69]} ; Scornavacche, M. ^{[8, 62]} ; Segreto, A. ^{[40, 100]} ; Sehgal, S. ^[23] ; Shellard, R. C. ^[101] ; Sigl, G. ^[88] ; Silli, G. ^{[8, 62]} ; Sima, O. ^{[20, 102]} ; Smida, R. ^[72] ; Sommers, P. ^[93] ; Soriano, J. F. ^[13] ; Souchard, J. ^[25] ; Squartini, R. ^[48] ; Stadelmaier, M. ^{[8, 62]} ; Stanca, D. ^[20] ; Stanic, S. ^[77] ; Stasielak, J. ^[35] ; Stassi, P. ^[25] ; Streich, A. ^{[8, 30]} ; Suarez-Duran, M. ^[80] ; Sudholz, T. ^[6] ; Suomijarvi, T. ^[31] ; Supanitsky, A. D. ^[8] ; Szadkowski, Z. ^[103] ; Tapia, A. ^[104] ; Taricco, C. ^{[4, 12]} ; Timmermans, C. ^{[11, 44]} ; Tkachenko, O. ^[62] ; Tobiska, P. ^[19] ; Todero Peixoto, C. J. ^[46] ; Tome, B. ^{[1, 2]} ; Torres, Z. ^[25] ; Travaini, A. ^[48] ; Travnicek, P. ^[19] ; Trimarelli, C. ^{[21, 32]} ; Tueros, M. ^{[68, 69]} ; Ulrich, R. ^[62] ; Unger, M. ^[62] ; Vaclavek, L. ^[50] ; Vacula, M. ^[50] ; Valdes Galicia, J. F. ^[66] ; Valore, L. ^{[14, 52]} ; Varela, E. ^[86] ; Vasquez-Ramirez, A. ^[95] ; Veberic, D. ^[62] ; Ventura, C. ^[63] ; Vergara Quispe, I. D. ^{[68, 69]} ; Verzi, V. ^[92] ; Vicha, J. ^[19] ; Vink, J. ^[105] ; Vorobiov, S. ^[77] ; Wahlberg, H. ^{[68, 69]} ; Watanabe, C. ^[33] ; Watson, A. A. ^[106] ; Weber, M. ^[74] ; Weindl, A. ^[62] ; Wiencke, L. ^[83] ; Wilczynski, H. ^[35] ; Wirtz, M. ^[15] ; Wittkowski, D. ^[23] ; Wundheiler, B. ^[8] ; Yushkov, A. ^[19] ; Zapparrata, O. ^[80] ; Zas, E. ^[10] ; Zavrtanik, D. ^{[76, 77]} ; Zavrtanik, M. ^{[76, 77]} ; Zehrer, L. ^[77] ; Collaboration, Pierre Auger

Affiliation:Show less -

^[1] Univ Lisboa UL, Lab Instrumentacao & Fis Expt Particulas LIP, Lisbon - Portugal

^[2] Univ Lisboa UL, Inst Super Tecn IST, Lisbon - Portugal

^[3] Consejo Nacl Invest Cient & Tecn, UNCuyo, CNEA, Ctr Atom Bariloche, San Carlos De Bariloche - Argentina

^[4] INFN, Sez Torino, Turin - Italy

^[5] INAF, Osservatorio Astrofis Torino, Turin - Italy

^[6] Univ Adelaide, Adelaide, SA - Australia

^[7] Consejo Nacl Invest Cient & Tecn, UNCuyo, CNEA, Inst Balseiro, San Carlos De Bariloche - Argentina

^[8] UNSAM, CONICET, CNEA, Inst Tecnol Detecc & Astroparticulas, Buenos Aires, DF - Argentina

^[9] Univ Tecnol Nacl, Fac Reg Buenos Aires, Buenos Aires - Argentina

^[10] Univ Santiago Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela - Spain

^[11] Radboud Univ Nijmegen, IMAPP, Nijmegen - Netherlands

^[12] Univ Torino, Dipartimento Fis, Turin - Italy

^[13] CUNY, Lehman Coll, Dept Phys & Astron, Bronx, NY - USA

^[14] INFN, Sez Napoli, Naples - Italy

^[15] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen - Germany

^[16] Univ Michoacana, Morelia, Michoacan - Mexico

^[17] Observ Pierre Auger & Comis Nacl Energia, Malargue - Argentina

^[18] Univ Politeh Bucharest, Bucharest - Romania

^[19] Czech Acad Sci, Inst Phys, Prague - Czech Republic

^[20] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest - Romania

^[21] INFN, Lab Nazl Gran Sasso, Laquila - Italy

^[22] Gran Sasso Sci Inst, Laquila - Italy

^[23] Berg Univ Wuppertal, Dept Phys, Wuppertal - Germany

^[24] Univ Nacl San Agustin Arequipa, Fac Ciencias Nat & Form, Arequipa - Peru

^[25] Univ Grenoble Alpes, CNRS, Grenoble Inst Engn, LPSC IN2P3, F-38000 Grenoble - France

^[26] Max Planck Inst Radioastron, Bonn - Germany

^[27] Univ Paris, Sorbonne Univ, Lab Phys Nucl & Hautes Energies LPNHE, CNRS IN2P3, Paris - France

^[28] Fac Ciencias Bioquim & Farmaceut UNR, Rosario - Argentina

^[29] Consejo Nacl Invest Cient & Tecn, UNR, Inst Fis Rosario IFIR, Rosario - Argentina

^[30] Karlsruhe Inst Technol KIT, Inst Expt Particle Phys, Karlsruhe - Germany

^[31] Univ Paris Saclay, CNRS, IN2P3, IJCLab, Orsay - France

^[32] Univ Aquila, Dipartimento Sci Fis & Chim, Laquila - Italy

^[33] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, RJ - Brazil

^[34] Univ Sao Paulo, Inst Fis, Sao Paulo, SP - Brazil

^[35] Inst Nucl Phys PAN, Krakow - Poland

^[36] Colorado State Univ, Ft Collins, CO - USA

^[37] Univ Siegen, Dept Phys Expt Teilchenphys, Siegen - Germany

^[38] Univ Granada & CAFPE, Granada - Spain

^[39] Vrije Univ Brussels, Brussels - Belgium

^[40] INFN, Sez Catania, Catania - Italy

^[41] Univ Autonoma Chiapas, Tuxtla Gutierrez, Chiapas - Mexico

^[42] Univ Milan, Dipartimento Fis, Milan - Italy

^[43] INFN, Sez Milano, Milan - Italy

^[44] Natl Inst Kernfysica Hoge Energie Fys NIKHEF, Sci Pk, Amsterdam - Netherlands

^[45] Univ Catania, Dipartimento Fis & Astron, Catania - Italy

^[46] Univ Sao Paulo, Escola Engn Lorena, Lorena, SP - Brazil

^[47] INFN, Sez Lecce, Lecce - Italy

^[48] Observ Pierre Auger, Malargue - Argentina

^[49] Univ Estadual Campinas, IFGW, Campinas, SP - Brazil

^[50] Palacky Univ, RCPTM, Olomouc - Czech Republic

^[51] Univ Tecnol Nacl, Fac Reg Mendoza, Inst Tecnol Detecc & Astroparticulas, CNEA, UNSAM, CONICET, Mendoza - Argentina

^[52] Univ Napoli Federico II, Dipartimento Fis Ettore Pancini, Naples - Italy

^[53] Univ Delaware, Bartol Res Inst, Dept Phys & Astron, Newark, DE - USA

^[54] Politecn Milan, Dipartimento Sci & Tecnol Aerosp, Milan - Italy

^[55] Univ Salento, Dipartimento Matemat & Fis E Giorgi, Lecce - Italy

^[56] Univ Fed Fluminense, EEIMVR, Volta Redonda, RJ - Brazil

^[57] Case Western Reserve Univ, Cleveland, OH - USA

^[58] Univ Buenos Aires, Dept Fis, Buenos Aires, DF - Argentina

^[59] CONICET UBA, IAFE, Inst Astron & Fis Espacio, Buenos Aires, DF - Argentina

^[60] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF - Argentina

^[61] Univ Buenos Aires, FCEyN, Dept Ciencias Atmosfera & Oceanos, Buenos Aires, DF - Argentina

^[62] Karlsruhe Inst Technol KIT, Inst Astroparticle Phys, Karlsruhe - Germany

^[63] Univ Fed Rio de Janeiro UFRJ, Observ Valongo, Rio De Janeiro, RJ - Brazil

^[64] Ciencia Tecnol Rio De Janeiro IFRJ, Inst Fed Educ, Rio De Janeiro - Brazil

^[65] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

^[66] Univ Nacl Autonoma Mexico, Mexico City, DF - Mexico

^[67] Univ Fed Parana, Setor Palotina, Palotina - Brazil

^[68] Consejo Nacl Invest Cient & Tecn, La Plata - Argentina

^[69] Univ Nacl La Plata, IFLP, La Plata - Argentina

^[70] Fermilab, Batavia, IL - USA

^[71] Stichting Astron Onderzoek Nederland ASTRON, Dwingeloo - Netherlands

^[72] Univ Chicago, Enrico Fermi Inst, Chicago, IL - USA

^[73] NYU, New York, NY - USA

^[74] Karlsruhe Inst Technol KIT, Inst Prozessdatenverarbeitung & Elekt, Karlsruhe - Germany

^[75] Michigan Technol Univ, Houghton, MI - USA

^[76] J Stefan Inst, Expt Particle Phys Dept, Ljubljana - Slovenia

^[77] Univ Nova Gorica, Ctr Astrophys & Cosmol CAC, Nova Gorica - Slovenia

^[78] Kyoto Univ, Hakubi Ctr Adv Res, Kyoto - Japan

^[79] Kyoto Univ, Grad Sch Sci, Kyoto - Japan

^[80] Univ Libre Bruxelles ULB, Brussels - Belgium

^[81] Univ Estadual Feira de Santana, Feira De Santana, BA - Brazil

^[82] Inst Space Sci, Bucharest - Romania

^[83] Colorado Sch Mines, Golden, CO - USA

^[84] Ctr Fed Educ Tecnol Celso Suckow Fonseca, Nova Friburgo - Brazil

^[85] Univ Fed ABC, Santo Andre, SP - Brazil

^[86] Benemerita Univ Autonoma Puebla, Puebla - Mexico

^[87] Univ Wisconsin, Dept Phys & WIPAC, Madison, WI - USA

^[88] Univ Hamburg, Inst Theoret Phys 2, Hamburg - Germany

^[89] Univ Palermo, Dipartimento Fis & Chim E Segre, Palermo - Italy

^[90] Louisiana State Univ, Baton Rouge, LA - USA

^[91] Univ Roma Tor Vergata, Dipartimento Fis, Rome - Italy

^[92] INFN, Sez Roma Tor Vergata, Rome - Italy

^[93] Penn State Univ, University Pk, PA - USA

^[94] Charles Univ Prague, Inst Particle & Nucl Phys, Fac Math & Phys, Prague - Czech Republic

^[95] Univ Ind Santander, Bucaramanga - Colombia

^[96] Consejo Nacl Invest Cient & Tecn, Villa Martelli - Argentina

^[97] CITEDEF, Ctr Invest Laseres & Aplicac, Villa Martelli - Argentina

^[98] Avanzadas Inst Politecn Nacl UPIITA IPN, Unidad Profes Interdisciplinaria Ingn & Tecnol, Mexico City, DF - Mexico

^[99] Univ Groningen, Kapteyn Astron Inst, Groningen - Netherlands

^[100] INFN, Ist Astrofis Spaziale & Fis Cosm Palermo, Palermo - Italy

^[101] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ - Brazil

^[102] Univ Bucharest, Phys Dept, Bucharest - Romania

^[103] Univ Lodz, Fac High Energy Astrophys, Lodz, Lodz - Poland

^[104] Univ Medellin, Medellin - Colombia

^[105] Univ Amsterdam, Fac Sci, Amsterdam - Netherlands

^[106] Univ Leeds, Sch Phys & Astronomy, Leeds, W Yorkshire - England

• Document type: Journal article
• Source: EUROPEAN PHYSICAL JOURNAL C; v. 81, n. 11 NOV 2021.
• Web of Science Citations: 0

Abstract

We present a measurement of the cosmic-ray spectrum above 100PeV using the part of the surface detector of the Pierre Auger Observatory that has a spacing of 750 m. An inflection of the spectrum is observed, confirming the presence of the so-called second-knee feature. The spectrum is then combined with that of the 1500m array to produce a single measurement of the flux, linking this spectral feature with the three additional breaks at the highest energies. The combined spectrum, with an energy scale set calorimetrically via fluorescence telescopes and using a single detector type, results in the most statistically and systematically precise measurement of spectral breaks yet obtained. These measurements are critical for furthering our understanding of the highest energy cosmic rays. (AU)

• FAPESP's process: 10/07359-6 - Study of cosmic rays of highest energies with the Pierre Auger Observatory
• Grantee: Carola Dobrigkeit Chinellato
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 99/05404-3 - Pierre Auger Observatory
• Grantee: Carlos Ourivio Escobar
• Support Opportunities: Research Projects - Thematic Grants