A coarse-grain search for anisotropy in the arrival directions of cosmic rays above 10 to the 17th eV

Details A coarse-grain search for anisotropy in the arrival directions of cosmic rays above 10 to the 17th eV A coarse-grain search for anisotropy in the arrival directions of cosmic rays above 10 to the 17th eV

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351..454c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 454-458.

Astronomy and Astrophysics

Astrophysics

8

Cosmic Rays, Galactic Radiation, Milky Way Galaxy, Anisotropy, Energetic Particles, Radiation Detectors

Scientific paper

The cosmic-ray intensity measured by the Fly's Eye reveals no statistically significant anisotropy when averaged over large solid angles. The sky is divided into six lobes of equal solid angle which are centered on the directions of the Galactic coordinate axes. For each of nine logarithmic energy bands, the number of detected cosmic rays in each lobe is compared with the number expected from an isotropic intensity. The excesses and deficits are not large compared to statistical uncertainties in the expected numbers. Harmonic analysis of the right-ascension distribution of cosmic rays is also reported for the different energy bands.

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