We review open questions and prospects for progress in ultrahigh-energy cosmic ray
(UHECR) research, based on a series of discussions that took place during the “The High …

ABSTRACT The Telescope Array (TA) collaboration has measured the energy spectrum of
ultra-high energy cosmic rays (UHECRs) with primary energies above 1.6× 10 18 eV. This …

We report on a measurement of the cosmic ray energy spectrum by the Telescope Array Low-
Energy Extension (TALE) air fluorescence detector (FD). The TALE air FD is also sensitive to …

We report on a measurement of the cosmic-ray composition by the Telescope Array Low-
energy Extension (TALE) air fluorescence detector (FD). By making use of the Cherenkov …

Abstract The Telescope Array (TA) experiment is the largest detector to observe ultra-high-
energy cosmic rays in the northern hemisphere. The fluorescence detectors at two stations …

The large-scale distribution of arrival directions of cosmic rays is an important observable in
attempts to understand their origin. This is because this observable is closely connected to …

We measure the spectrum of cosmic rays with energies greater than 10 18.2 eV with the
fluorescence detectors (FDs) and the surface detectors (SDs) of the Telescope Array …

Cosmic rays in the energy range 10 18.0–10 18.5 eV are thought to have a light, probably
protonic, composition. To study their origin one can search for anisotropy in their 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 …

We present a measurement of the energy spectrum of ultra-high-energy cosmic rays
performed by the Telescope Array experiment using monocular observations from its two …