In this report we review the important progress made in recent years towards understanding
the experimental data on ultra-high-energy (E≳ 1 0 9 GeV) cosmic rays. We begin with a …

We outline the science motivation for SGSO, the Southern Gamma-Ray Survey Observatory.
SGSO will be a next-generation wide field-of-view gamma-ray survey instrument, sensitive to …

Ultra-High-Energy Cosmic-Ray (UHECR) astronomy in the next decade aims to answer the
questions: What is the nature and origin of UHECRs? How are UHECRs accelerated to such …

The origin, propagation, and composition of cosmic rays remains an open area of research
with several unanswered questions. For example, more than half a century after the …

TA reported a possible point source, Hotspot. If there are point sources like hotspot, but with
low energy, the energy spectrum around the source direction can be different from other …

The Telescope Array has accumulated the largest UHECR data set in the Northern
hemisphere. We make use of these data to search for large-and small-scale anisotropy of …