Measurement of anisotropy of ultra-high energy cosmic rays by the Telescope Array

Details Measurement of anisotropy of ultra-high energy cosmic rays by the Telescope Array Measurement of anisotropy of ultra-high energy cosmic rays by the Telescope Array

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1367..100t&link_type=abstract

INTERNATIONAL SYMPOSIUM ON THE RECENT PROGRESS OF ULTRA-HIGH ENERGY COSMIC RAY OBSERVATION. AIP Conference Proceedings, Volume

Statistics

Applications

2

Cosmic Rays, Cosmic Ray Apparatus, Scintillators, Data Acquisition, Monte Carlo Methods, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays, Neutrino, Muon, Pion, And Other Elementary Particle Detectors, Cosmic Ray Detectors, Scintillation Detectors, Data Acquisition: Hardware And Software, Applications Of Monte Carlo Methods

Scientific paper

We study anisotropy of ultra-high energy cosmic ray (UHECR) events collected by the Telescope Array detector in the first 2 years of operation. We find that the self-correlation function of UHECR at energies larger 10 and 40 EeV shows no significant small-scale clustering. The events with energy E>57 EeV do not significantly correlate with the positions of the nearby active galactic nuclei (AGN): of observed 15 events 6 are found within 3.7° from an AGN, while 3.6 are expected for a random distribution (16% chance probability). We also check the event sets with energies E>40 EeV and E>57 EeV for correlations with the large scale structure (LSS) of the Universe. We find that both data sets are compatible with the LSS model at the 95% confidence level.

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