Measurement of the cosmic ray spectrum above 4 × 1018 eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding 4×1018 eVis presented, which is based on the analysis of showers with zenith angles greater than60◦ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppressio...

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Detalles Bibliográficos
Autores: Allekotte, Ingomar, Asorey, Hernán Gonzalo, Bertou, Xavier Pierre Louis, Dasso, Sergio Ricardo, Dova, Maria Teresa, Etchegoyen, Alberto, Freire, Martín Miguel, Garcia, Beatriz Elena, Golup, Geraldina Tamara, Gomez Berisso, Mariano, González, Nicolás Martín, Hampel, Matias Rolf, Hansen, Patricia Maria, Harari, Diego Dario, Jarne, Cecilia Gisele, Josebachuili Ogando, Mariela Gisele, Melo, Diego Gabriel, Micheletti, Maria Isabel, Mollerach, Maria Silvia, Pallotta, Juan Vicente, Piegaia, Ricardo Nestor, Pieroni, Pablo Emanuel, Platino, Manuel, Purrello, Víctor Hugo, Quel, Eduardo Jaime, Ravignani Guerrero, Diego, Ristori, Pablo Roberto, Roulet, Esteban, Rovero, Adrian Carlos, Sanchez, Federico Andrés, Sciutto, Sergio Juan, Sidelnik, Iván Pedro, Suarez, Federico, Supanitsky, Alberto Daniel, Taborda Pulgarin, Oscar Alejandro, Tapia Casanova, Alex Marcelo, Wahlberg, Hernan Pablo, Wundheiler, Brian
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/56136
Acceso en línea:http://hdl.handle.net/11336/56136
Access Level:acceso abierto
Palabra clave:Rayos Cosmicos
Cosmic Ray Experiments
Ultra High Energy Cosmic Rays
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:A measurement of the cosmic-ray spectrum for energies exceeding 4×1018 eVis presented, which is based on the analysis of showers with zenith angles greater than60◦ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies.Above 5.3×1018 eV, the ?ankle?, the flux can be described by a power law E −γ with index γ = 2.70 ± 0.02 (stat) ± 0.1 (sys) followed by a smooth suppression region. For the energy(Es ) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es = (5.12 ± 0.25 (stat)−1.2 (sys))×10 eV.

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