@article{oai:repo.qst.go.jp:00080589,
 author = {U. Abbasi, R. and Abe, M. and T., Abu-Zayyad and Allen, M. and Azuma, R. and Uchihori, Yukio and Many others and Yukio, Uchihori},
 issue = {2},
 journal = {The Astrophysical Journal Letters},
 month = {Jul},
 note = {Motivated by the detection of a significant dipole structure in the arrival directions of ultra-high-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger), we search for a large-scale anisotropy using data collected with the surface detector array of the Telescope Array Experiment (TA). With 11 yr of TA data, a dipole structure in a projection of the R.A. is fitted with an amplitude of 3.3% ± 1.9% and a phase of 131° ± 33°. The corresponding 99% confidence-level upper limit on the amplitude is 7.3%. At the current level of statistics, the fitted result is compatible with both an isotropic distribution and the dipole structure reported by Auger.},
 title = {Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment},
 volume = {898},
 year = {2020}
}