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Updated Results on the UHECR Hotspot Observed by the Telescope Array Experimentopen access
- Authors
- Kawata, K.[Kawata, K.]; di, Matteo A.[di, Matteo A.]; Fujii, T.[Fujii, T.]; Ikeda, D.[Ikeda, D.]; Ivanov, D.[Ivanov, D.]; Jui, C.C.H.[Jui, C.C.H.]; Kido, E.[Kido, E.]; Lundquist, J.P.[Lundquist, J.P.]; Matthews, J.N.[Matthews, J.N.]; Nagataki, S.[Nagataki, S.]; Nonaka, T.[Nonaka, T.]; Ogio, S.[Ogio, S.]; Okuda, T.[Okuda, T.]; Rubtsov, G.[Rubtsov, G.]; Sagawa, H.[Sagawa, H.]; Sako, T.[Sako, T.]; Sakurai, N.[Sakurai, N.]; Takeda, M.[Takeda, M.]; Takeishi, R.[Takeishi, R.]; Taketa, A.[Taketa, A.]; Thomson, G.B.[Thomson, G.B.]; Tinyakov, P.[Tinyakov, P.]; Tkachev, I.[Tkachev, I.]; Troitsky, S.[Troitsky, S.]; the Telescope Array Collaboration[the Telescope Array Collaboration]
- Issue Date
- Jul-2021
- Publisher
- Sissa Medialab Srl
- Citation
- Proceedings of Science, v.358
- Indexed
- SCOPUS
- Journal Title
- Proceedings of Science
- Volume
- 358
- ISSN
- 1824-8039
- Abstract
- The Telescope Array Experiment has observed an indication of intermediate-scale anisotropy in the UHECR arrival directions, called the Hotspot, with E > 57 EeV around the Ursa Major using the first 5-year data during a period between May 2008 and May 2013 collected by the TA surface detector array. The chance probability of this hotspot in an isotropic cosmic-ray sky was calculated to be 3.4σ (post trial). In this paper, we will report on an update of this result using the 11-year data collected by the TA surface detectors with more than doubled exposure since the first publication. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
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