Possible Clustering of the Most Energetic Cosmic Rays within a Limited Space Angle Observed by the Akeno Giant Air Shower Array

Details Possible Clustering of the Most Energetic Cosmic Rays within a Limited Space Angle Observed by the Akeno Giant Air Shower Array Possible Clustering of the Most Energetic Cosmic Rays within a Limited Space Angle Observed by the Akeno Giant Air Shower Array

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvl..77.1000h&link_type=abstract

Physical Review Letters, Volume 77, Issue 6, August 5, 1996, pp.1000-1003

Mathematics

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137

Scientific paper

Accumulated data of the Akeno Giant Air Shower Array (AGASA) indicate that arrival directions of a significant fraction of extremely high energy cosmic rays (EHECR) are uniformly distributed over the observable sky. However, three pairs of showers with angular separation of less than 2.5° within the pair are observed among the 36 events above 40 EeV ( 4×1019 eV), corresponding to a chance probability of 2.9% from uniform distribution. It should be noted that two pairs of them are observed to be within 2.0° of the supergalactic plane.

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