Testing the Uniformity of the Distribution of Arrival Directions of EHECR Events

Details Testing the Uniformity of the Distribution of Arrival Directions of EHECR Events Testing the Uniformity of the Distribution of Arrival Directions of EHECR Events

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..tss.cb003b&link_type=abstract

American Physical Society, Joint Spring Meeting of the Texas Sections of the APS and AAPT, and Zone 13 of the SPS March 7-9, 200

Astronomy and Astrophysics

Astrophysics

Scientific paper

One of the major challenges confronting both astrophysics and high energy particle physics is to explain the identity, origin, propagation, and interaction with the Earth's atmosphere of ~ 10^20 eV extremely high energy cosmic rays (EHECRs). Although the observed small scale clustering of a few events is likely not random, the existence of nonrandom clustering at larger scales remains unclear. Using the 2-point angular correlation function on 48 EHECR events collected by the Akeno Giant Air Shower Array (AGASA), we find a positive, but possibly insignificant, correlation at 35-45 degree scales.

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