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Abstract:

An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than 10 19 eV, based on observations of the depth of shower maximum performed with the hybrid detector of the Pierre Auger Observatory. This is the first such limit on photons obtained by observing the fluorescence light profile of air showers. This upper limit confirms and improves on previous results from the Haverah Park and AGASA surface arrays. Additional data recorded with the Auger surface detectors for a subset of the event sample support the conclusion that a photon origin of the observed events is not favored. © 2006 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory
Autor:Abraham, J. et al.
Este artículo contiene 422 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 422 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Cosmic rays; Extensive air showers; Pierre Auger Observatory; Ultra-high energy photons; Auger electron spectroscopy; Fluorescence; Photons; Extensive air showers; Pierre Auger Observatory; Ultra high energy photons; Cosmic rays
Año:2007
Volumen:27
Número:2-3
Página de inicio:155
Página de fin:168
DOI: http://dx.doi.org/10.1016/j.astropartphys.2006.10.004
Título revista:Astroparticle Physics
Título revista abreviado:Astropart. Phys.
ISSN:09276505
CODEN:APHYE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09276505_v27_n2-3_p155_Abraham

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Citas:

---------- APA ----------
(2007) . An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory. Astroparticle Physics, 27(2-3), 155-168.
http://dx.doi.org/10.1016/j.astropartphys.2006.10.004
---------- CHICAGO ----------
Abraham, J. "An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory" . Astroparticle Physics 27, no. 2-3 (2007) : 155-168.
http://dx.doi.org/10.1016/j.astropartphys.2006.10.004
---------- MLA ----------
Abraham, J. "An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory" . Astroparticle Physics, vol. 27, no. 2-3, 2007, pp. 155-168.
http://dx.doi.org/10.1016/j.astropartphys.2006.10.004
---------- VANCOUVER ----------
Abraham, J. An upper limit to the photon fraction in cosmic rays above 10 19 eV from the Pierre Auger Observatory. Astropart. Phys. 2007;27(2-3):155-168.
http://dx.doi.org/10.1016/j.astropartphys.2006.10.004