159 articles – 2000 Notices  [english version]
 HAL : in2p3-00121061, version 1
 arXiv : astro-ph/0607382
 Code Bibliographique ADS : 2007APh....27..244A
 Astroparticle Physics 27 (2007) 244-253
 Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory
 PIERRE AUGER Collaboration(s)
 (2007)
 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 point-like 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.
 équipe(s) de recherche : APC - AHEAPC - Cosmologie et gravitationAPC - THEORIE
 Thème(s) : Planète et Univers/AstrophysiquePhysique/Astrophysique/Cosmologie et astrophysique extra-galactiquePlanète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
 Mot(s)-clé(s) : Cosmic rays – Anisotropies – Galactic centre
 Lien vers le texte intégral : http://fr.arXiv.org/abs/astro-ph/0607382
 in2p3-00121061, version 1 http://hal.in2p3.fr/in2p3-00121061 oai:hal.in2p3.fr:in2p3-00121061 Contributeur : Dominique Girod <> Soumis le : Mardi 19 Décembre 2006, 11:58:53 Dernière modification le : Vendredi 21 Septembre 2012, 15:30:21