S. Machida

TL;DR: The Telescope Array (TA) experiment as discussed by the authors was designed for the observation of extensive air showers from extremely high energy cosmic rays, and it has a surface detector array surrounded by three fluorescence detectors to enable simultaneous detection of shower particles at ground level and fluorescence photons along the shower track.

TL;DR: The Telescope Array experiment is supported by the Japan Society for the Promotion of Science through Grants-in-Aids for Scientific Research on Specially Promoted Research (21000002) "Extreme Phenomena in the Universe Explored by Highest Energy Cosmic Rays" and for scientific research (S) (19104006), and the Inter-University Research Program of the Institute for Cosmic Ray Research.

TL;DR: In this article, the characteristics and installation of the new FDs and the performances of the FD components are reported and the results of the monitored mirror reflectance during the observation time are also described.

TL;DR: The Telecope Array (TA) as mentioned in this paper is a hybrid detector system consisting of both a surface detector array as well as a set of fluorescence detectors, which can measure the energy spectrum, anisotropy and composition of ultra-high energy cosmic rays.

TL;DR: In this article, the anisotropy of UHECR events collected by the Telescope Array (TA) detector in the first 40 months of operation was studied and it was shown that the distributions of the events in right ascension and declination are compatible with an isotropic distribution in all three sets.