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

par Tiniakov, Petr ;Tkachev, Igor;Okuda, Takeshi
Référence AIP Conference Proceedings, 1367, page (100-105)
Publication Publié, 2011

Article révisé par les pairs

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Résumé :

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>57EeV 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>40EeV and E>57EeV 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. © 2011 American Institute of Physics.