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Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment
- Authors
- Abbasi, R. U.; Abe, M.; Abu-Zayyad, T.; Allen, M.; Azuma, R.; Barcikowski, E.; Belz, J. W.; Bergman, D. R.; Blake, S. A.; Cady, R.; Cheon, B. G.; Chiba, J.; Chikawa, M.; di Matteo, A.; Fujii, T.; Fujisue, K.; Fujita, K.; Fujiwara, R.; Fukushima, M.; Furlich, G.; Hanlon, W.; Hayashi, M.; Hayashida, N.; Hibino, K.; Higuchi, R.; Honda, K.; Ikeda, D.; Inadomi, T.; Inoue, N.; Ishii, T.; Ishimori, R.; Ito, H.; Ivanov, D.; Iwakura, H.; Jeong, H. M.; Jeong, S.; Jui, C. C. H.; Kadota, K.; Kakimoto, F.; Kalashev, O.; Kasahara, K.; Kasami, S.; Kawai, H.; Kawakami, S.; Kawana, S.; Kawata, K.; Kido, E.; Kim, H. B.; Kim, J. H.; Kim, M. H.; Kim, S. W.; Kishigami, S.; Kuzmin, V; Kuznetsov, M.; Kwon, Y. J.; Lee, K. H.; Lubsandorzhiev, B.; Lundquist, J. P.; Machida, K.; Matsumiya, H.; Matsuyama, T.; Matthews, J. N.; Mayta, R.; Minamino, M.; Mukai, K.; Myers, I; Nagataki, S.; Nakai, K.; Nakamura, R.; Nakamura, T.; Nakamura, Y.; Nonaka, T.; Oda, H.; Ogio, S.; Ohnishi, M.; Ohoka, H.; Oku, Y.; Okuda, T.; Omura, Y.; Ono, M.; Onogi, R.; Oshima, A.; Ozawa, S.; Park, I. H.; Pshirkov, M. S.; Remington, J.; Rodriguez, D. C.; Rubtsov, G.; Ryu, D.; Sagawa, H.; Sahara, R.; Saito, Y.; Sakaki, N.; Sako, T.; Sakurai, N.; Sano, K.; Seki, T.; Sekino, K.; Shah, P. D.; Shibata, F.; Shibata, T.; Shimodaira, H.; Shin, B. K.; Shin, H. S.; Smith, J. D.; Sokolsky, P.; Sone, N.; Stokes, B. T.; Stroman, T. A.; Suzawa, T.; Takagi, Y.; Takahashi, Y.; Takamura, M.; Takeda, M.; Takeishi, R.; Taketa, A.; Takita, M.; Tameda, Y.; Tanaka, H.; Tanaka, K.; Tanaka, M.; Tanoue, Y.; Thomas, S. B.; Thomson, G. B.; Tinyakov, P.; Tkachev, I; Tokuno, H.; Tomida, T.; Troitsky, S.; Tsunesada, Y.; Uchihori, Y.; Udo, S.; Uehama, T.; Urban, F.; Wong, T.; Yada, K.; Yamamoto, M.; Yamazaki, K.; Yang, J.; Yashiro, K.; Yosei, M.; Zhezher, Y.; Zundel, Z.
- Issue Date
- Aug-2020
- Publisher
- IOP PUBLISHING LTD
- Keywords
- Cosmic rays; Ultra-high-energy cosmic radiation; Cosmic ray sources; Cosmic ray showers; Cosmic ray detectors; Cosmic ray astronomy; Extragalactic astronomy; Extragalactic magnetic fields
- Citation
- ASTROPHYSICAL JOURNAL LETTERS, v.898, no.2, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- ASTROPHYSICAL JOURNAL LETTERS
- Volume
- 898
- Number
- 2
- Start Page
- 1
- End Page
- 5
- ISSN
- 2041-8205
- Abstract
- 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 degrees 33 degrees. 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.
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Related Researcher
- Cheon, Byung Gu
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)