LABORATORI NAZIONALI DEL GRAN SASSO

SEMINAR ANNOUNCEMENT

On June 7, 2006 at 14:30, Carla B. Bonifazi of CBPF, Rio de Janerio will give a seminar entitled:

“Anisotropy studies around the Galactic Center with the Pierre Auger Observatory”

Abstract:

Data from the Pierre Auger Observatory have been analyzed to search for anisotropies near the direction of the galactic center in the energy range from 0.8 to 3.2 EeV. In this region of the sky the statistics accumulated by the Observatory are already larger than that of any previous experiment. Using both the data sets from the surface detector and the hybrid data sets (events detected simultaneously by the surface detector and the fluouorescence detector) we do not find any significant excess. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on the flux of cosmic rays arriving within a few degrees from the galactic center for this energy range. We also have searched for correlations of cosmic ray arrival directions with the galactic plane and the super-galactic plane at energies in the range 1-5 EeV and above 5 EeV respectively. We have found no significant excess.

(“E. Majorana” room)