Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support pre...

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Detalles Bibliográficos
Autores principales: Badagnani, Daniel Omar, Dova, María Teresa, Epele, Luis Nicolás, Gómez Albarracín, Flavia Alejandra, Grunfeld, Christian Martín, Manceñido, Mónica E., Martínez, Norberto Horacio, Sciutto, Sergio Juan, Tueros, Matías Jorge, Veiga, Alejandro Luis, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Exactas
Física
Radiación cósmica
Anisotropía
centro galáctico
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80565
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a pointlike flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the ‘hybrid’ data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction.

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