The Telescope Array (TA) collaboration has reported a hotspot of 19 ultrahigh-energy
cosmic rays (UHECRs). Using a universal model with one source and energy-dependent …

We study the anisotropy of Ultra-High Energy Cosmic Ray (UHECR) events collected by the
Telescope Array (TA) detector in the first 40 months of operation. Following earlier studies …

We present a numerical code designed to conduct a likelihood analysis for clusters of
nucleons above 10 19 eV originating from discrete astrophysical sources such as powerful …

Abstract The Telescope Array (TA) experiment, the largest observatory studying ultrahigh
energy cosmic rays in the northern hemisphere, has reported an excess in the arrival …

We search for correlations between the positions of extragalactic objects and the arrival
directions of ultra-high energy cosmic rays (UHECRs) with primary energy E⩾ 40 EeV as …

The origin of ultra-high-energy cosmic rays is a 60 yr old mystery. We show that with more
events at the highest energies (above 150 EeV) it may be possible to limit the character of …

Ultrahigh-energy cosmic rays (UHECRs) are known to come from outside of our Galaxy, but
their origin still remains unknown. The Telescope Array (TA) experiment recently identified a …

We use a new method to estimate the injected mass composition of ultrahigh cosmic rays
(UHECRs) at energies higher than 10 EeV. The method is based on comparison of the …

We present a method to analyse arrival directions of ultra-high-energy cosmic rays
(UHECRs) using a classifier defined by a deep convolutional neural network trained on a …

The origin of ultra-high-energy cosmic rays (UHECRs), which reach energy 1020 eV,
remains the mysteries in modern astrophysics. The main obstacles in identifying the origin of …