The Cosmic Ray Anisotropy between 1014 and 1015 eV

Details The Cosmic Ray Anisotropy between 1014 and 1015 eV The Cosmic Ray Anisotropy between 1014 and 1015 eV

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....1..183a&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

2

Scientific paper

The study of the anisotropy of the arrival directions is an essential and complementary to ol, with respect to the energy spectrum and composition, to investigate the origin and propagation of cosmic rays primaries. In particular, the study of the evolution of the CR anisotropy over primary energy can be very powerful for the interpretation of the knee in the CR primary spectrum. By means of the EAS-TOP data (four years) we have reported an anisotropy measurement at primary energy E0 ≈ 1014 eV [1], with amplitude Asid,δ=0° = (3.7 ± 0.6) · 10-4 and phase φ = (1.8 ± 0.5) hr LST, at a significance level 6.5 s.d. The use of the full EAS-TOP data set and the application of different criteria of data selection allow to extend this measurement to higher energies, up to around 1015 eV. We report here the results of the first harmonic analysis, both in solar and sidereal time, in five energy bins.

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