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

1 APC - AHE - APC - Astrophysique des Hautes Energies
APC (UMR_7164) - AstroParticule et Cosmologie, Dipartimento di Astronomia, Universita degli Studi di Bologna
7 APC - Cosmologie
APC (UMR_7164) - AstroParticule et Cosmologie
8 APC - THEORIE
Institut für theoretische Physik, APC (UMR_7164) - AstroParticule et Cosmologie
Abstract : 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.
Keywords :
Document type :
Journal articles
Domain :

http://hal.in2p3.fr/in2p3-00121061
Contributor : Dominique Girod <>
Submitted on : Tuesday, December 19, 2006 - 11:58:53 AM
Last modification on : Thursday, December 10, 2020 - 9:16:04 AM

### Citation

J. Abraham, M. Aglietta, C. Aguirre, D. Allard, I. Allekotte, et al.. Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory. Astroparticle Physics, Elsevier, 2007, 27, pp.244-253. ⟨10.1016/j.astropartphys.2006.11.002⟩. ⟨in2p3-00121061⟩

Record views