Abstract The Extreme Universe Space Observatory (EUSO) onboard the Japanese
Experiment Module (JEM-EUSO) of the International Space Station (ISS) is an innovative …

In this paper we review all the up-to-date Ultra High Energy Cosmic Ray (UHECR) events
reported by AUGER, the Telescope Array (TA) and AGASA in common coordinate maps. We …

The origin and nature of ultrahigh-energy cosmic rays (UHECRs) are one of the most
intriguing mysteries in particle astrophysics and astronomy. The two largest observatories …

More than half a century after the discovery of ultra-high energy cosmic rays (UHECRs), their
origin is still an open question. The study of anisotropies in the arrival directions of such …

The two main advantages of space-based observation of extreme energy (≳ 5× 10 19 eV)
cosmic rays (EECRs) over ground based observatories are the increased field of view and …

The existence of protons and nuclei with joule-scale kinetic energies–up to 1020 eV–,
known as ultra-high energy cosmic rays (UHECRs), is one of the most intriguing unsolved …

The arrival directions of extremely high energy cosmic rays (EHECR) above 4× 1019 eV,
observed by four surface array experiments in the northern hemisphere, are examined for …

We have calculated the probability that the clustering of arrival directions of ultra-high
energy cosmic rays (UHECRs) is consistent with a finite number of uniformly distributed …

The Telescope Array (TA) is the largest ultra-high-energy cosmic-ray (UHECR) detector in
the northern hemisphere. It consists of an array of 507 surface detectors (SD) covering a …

We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-
energy cosmic rays with energies above 57 EeV in the northern sky using data collected …