Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory

A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front. Applying this m...

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Autores principales: Badagnani, Daniel Omar, Dova, María Teresa, Epele, Luis Nicolás, Gómez Albarracín, Flavia Alejandra, Grunfeld, Christian Martín, Manceñido, Mónica E., Mariazzi, Analisa Gabriela, Moreno, Juan Cruz, Sciutto, Sergio Juan, Veiga, Alejandro Luis, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Exactas
Física
Cascada atmosférica
Fotones
Pierre Auger Observatory
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80624
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80624
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Cascada atmosférica
Fotones
Pierre Auger Observatory
spellingShingle Ciencias Exactas
Física
Cascada atmosférica
Fotones
Pierre Auger Observatory
Badagnani, Daniel Omar
Dova, María Teresa
Epele, Luis Nicolás
Gómez Albarracín, Flavia Alejandra
Grunfeld, Christian Martín
Manceñido, Mónica E.
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Veiga, Alejandro Luis
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
topic_facet Ciencias Exactas
Física
Cascada atmosférica
Fotones
Pierre Auger Observatory
description A method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory. The approach is based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front. Applying this method to the data, upper limits on the flux of photons of 3.8 x 10<sup>-3</sup>, 2.5 x 10<sup>-3</sup>; and 2.2 x 10<sup>-3</sup> km<sup>-2</sup> sr<sup>-1</sup> yr<sup>-1</sup> above 10<sup>19</sup> eV, 2 x 10<sup>19</sup> eV; and 4 x 10<sup>19</sup> eV are derived, with corresponding limits on the fraction of photons being 2.0%, 5.1%, and 31% (all limits at 95% c.l.). These photon limits disfavor certain exotic models of sources of cosmic rays. The results also show that the approach adopted by the Auger Observatory to calibrate the shower energy is not strongly biased by a contamination from photons.
format Articulo
Articulo
author Badagnani, Daniel Omar
Dova, María Teresa
Epele, Luis Nicolás
Gómez Albarracín, Flavia Alejandra
Grunfeld, Christian Martín
Manceñido, Mónica E.
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Veiga, Alejandro Luis
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_facet Badagnani, Daniel Omar
Dova, María Teresa
Epele, Luis Nicolás
Gómez Albarracín, Flavia Alejandra
Grunfeld, Christian Martín
Manceñido, Mónica E.
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Veiga, Alejandro Luis
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_sort Badagnani, Daniel Omar
title Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
title_short Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
title_full Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
title_fullStr Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
title_full_unstemmed Upper limit on the cosmic-ray photon flux above 10<sup>19</sup> eV using the surface detector of the Pierre Auger Observatory
title_sort upper limit on the cosmic-ray photon flux above 10<sup>19</sup> ev using the surface detector of the pierre auger observatory
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/80624
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