Testing for uniformity of Ultra-High Energy Cosmic Ray arrival directions

Abstract

Arrival directions of ultra-high energy cosmic rays (UHECRs) exhibit mainly an isotropic distribution with some small deviations in particular energy bins. In this paper, the Yakutsk array data are tested for circular uniformity of arrival directions in right ascension using 2 methods appropriate for the energy ranges below and above $10^{18}$ eV. No statistically significant deviation from uniformity is found in the arrival directions of cosmic rays (CRs) detected within the observation period 1974--2000.

Preprint of an article submitted for consideration in IJMPD \c{opyright} 2016 [copyright World Scientific Publishing Company] http://www.worldscientific.com/worldscinet/ijmpd

References in corpus (3)

• Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
• A minimal width of the arrival direction distribution of ultra-high energy cosmic rays detected with the Yakutsk array
• Large-scale distribution of cosmic rays in right ascension as observed by the Yakutsk array at energies above $10^{18}$ eV

Cited by in corpus (1)

• Zenith angle distribution of cosmic ray showers measured with the Yakutsk array and its application to analysis of arrival directions in equatorial coordinates