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INDICATIONS OF INTERMEDIATE-SCALE ANISOTROPY OF COSMIC RAYS WITH ENERGY GREATER THAN 57 EeV IN THE NORTHERN SKY MEASURED WITH THE SURFACE DETECTOR OF THE TELESCOPE ARRAY EXPERIMENTopen access
- Authors
- Abbasi, RU; Abe, M; Abu-Zayyad, T; Allen, M; Anderson, R; Azuma, R; Barcikowski, E; Belz, JW; Bergman, DR; Blake, SA; Cady, R; Chae, MJ; Cheon, BG; Chiba, J; Chikawa, M; Cho, WR; Fujii, T; Fukushima, M; Goto, T; Hanlon, W; Hayashi, Y; Hayashida, N; Hibino, K; Honda, K; Ikeda, D; Inoue, N; Ishii, T; Ishimori, R; Ito, H; Ivanov, D; Jui, CCH; Kadota, K; Kakimoto, F; Kalashev, O; Kasahara, K; Kawai, H; Kawakami, S; Kawana, S; Kawata, K; Kido, E; Kim, HB; Kim, JH; Kim, JH; Kitamura, S; Kitamura, Y; Kuzmin, V; Kwon, YJ; Lan, J; Lim, SI; Lundquist, JP; Machida, K; Martens, K; Matsuda, T; Matsuyama, T; Matthews, JN; Minamino, M; Mukai, K; Myers, I; Nagasawa, K; Nagataki, S; Nakamura, T; Nonaka, T; Nozato, A; Ogio, S; Ogura, J; Ohnishi, M; Ohoka, H; Oki, K; Okuda, T; Ono, M; Oshima, A; Ozawa, S; Park, IH; Pshirkov, MS; Rodriguez, DC; Rubtsov, G; Ryu, D; Sagawa, H; Sakurai, N; Sampson, AL; Scott, LM; Shah, PD; Shibata, F; Shibata, T; Shimodaira, H; Shin, BK; Smith, JD; Sokolsky, P; Springer, RW; Stokes, BT; Stratton, SR; Stroman, TA; Suzawa, T; Takamura, M; Takeda, M; Takeishi, R; Taketa, A; Takita, M; Tameda, Y; Tanaka, H; Tanaka, K; Tanaka, M; Thomas, SB; Thomson, GB; Tinyakov, P; Tkachev, I; Tokuno, H; Tomida, T; Troitsky, S; Tsunesada, Y; Tsutsumi, K; Uchihori, Y; Udo, S; Urban, F; Vasiloff, G; Wong, T; Yamane, R; Yamaoka, H; Yamazaki, K; Yang, J; Yashiro, K; Yoneda, Y; Yoshida, S; Yoshii, H; Zollinger, R; Zundel, Z
- Issue Date
- Aug-2014
- Publisher
- IOP PUBLISHING LTD
- Keywords
- acceleration of particles; cosmic rays; large-scale structure of universe; surveys
- Citation
- ASTROPHYSICAL JOURNAL LETTERS, v.790, no.2, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- ASTROPHYSICAL JOURNAL LETTERS
- Volume
- 790
- Number
- 2
- Start Page
- 1
- End Page
- 5
- ISSN
- 2041-8205
- Abstract
- We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-energy cosmic rays with energies above 57 EeV in the northern sky using data collected over a 5 yr period by the surface detector of the Telescope Array experiment. We report on a cluster of events that we call the hotspot, found by oversampling using 20 degrees radius circles. The hotspot has a Li-Ma statistical significance of 5.1 sigma, and is centered at R. A. = 146 degrees 7, decl. = 43 degrees 2. The position of the hotspot is about 19 degrees off of the supergalactic plane. The probability of a cluster of events of 5.1 sigma significance, appearing by chance in an isotropic cosmic-ray sky, is estimated to be 3.7 x 10(-4) (3.4 sigma).
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Collections - 서울 자연과학대학 > 서울 물리학과 > 1. Journal Articles
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Related Researcher
- Cheon, Byung Gu
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)