Cosmic Ray Anisotropy below 1015 eV

Abstract

Measurements have been made of the cosmic ray anisotropy at 35°S with a sea-level unshielded air shower array sensitive primarily to the proton component of the cosmic ray beam with energies between 1014 and 3x101S eV. The first harmonic of the anisotropy was found to have an amplitude of O· 34(±0 ·09)% at a phase of 318(±18)o.