Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory (CROSBI ID 173059)
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Podaci o odgovornosti
Abreu, P. ; ... ; Antičić, Tome ; ... ; Kadija, Krešo ; ... ; Mićanović, Saša ; ... ; Šuša, Tatjana ; ... ; Ziolkowski, M.
engleski
Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory
We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 × 10^17 eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% C.L. for EeV energies. We also compare our results to those of previous experiments as well as with some theoretical expectations.
ultra-high energy cosmic rays; large scale anisotropies; Pierre Auger Observatory
The Pierre Auger Collaboration
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