|Budget Amount *help
¥528,840,000 (Direct Cost: ¥406,800,000、Indirect Cost: ¥122,040,000)
Fiscal Year 2013: ¥122,330,000 (Direct Cost: ¥94,100,000、Indirect Cost: ¥28,230,000)
Fiscal Year 2012: ¥126,490,000 (Direct Cost: ¥97,300,000、Indirect Cost: ¥29,190,000)
Fiscal Year 2011: ¥134,290,000 (Direct Cost: ¥103,300,000、Indirect Cost: ¥30,990,000)
Fiscal Year 2010: ¥145,730,000 (Direct Cost: ¥112,100,000、Indirect Cost: ¥33,630,000)
Ultra-high energy cosmic rays (UHECRs) have been measured by the Telescope Array (TA) experiment installed in Utah, USA. We collected more than 80,000 samples of air showers with energies between 10^<18> and 10^<20> electron Volts (eV) in 5 years of observation. Analyses of these events indicated that they are consistent as being protons of extra-galactic origin, and their arrival directions become strongly anisotropic above 10^<19.76> eV. In future observations, we aim to pin down the sourcing astronomical object of UHECRs, and to investigate its acceleration mechanism.