Medium-scale anisotropies measured by Telescope Array surface detectors

Telescope Array Collaboration

doi:10.22323/1.501.0302

Medium-scale anisotropies measured by Telescope Array surface detectors

Telescope Array Collaboration

Department of Physics

Loyola University Chicago
University of Utah
Osaka Metropolitan University
Hanyang University
The University of Tokyo
Academia Sinica - Institute of Physics
Universidad Nacional Autónoma de México
Osaka Electro-Communication University
Kanagawa University
RIKEN
Sungkyunkwan University
Tokyo City University
Institute for Nuclear Research of the Russian Academy of Sciences
Shibaura Institute of Technology
Shinshu University
Université libre de Bruxelles

Research output: Contribution to journal › Conference article › peer-review

Abstract

The Telescope Array (TA) experiment, the largest observatory for ultra-high energy cosmic rays in the Northern Hemisphere, has identified two medium-scale anisotropies: the TA Hotspot near the constellation Ursa Major and an excess in the direction of the Perseus-Pisces supercluster. Studying these medium-scale anisotropies may provide insights into the origins of ultra-high energy cosmic rays. This presentation will explore an oversampling analysis of TA surface detector data to evaluate these medium-scale event excesses and will present the latest findings on the TA Hotspot and the Perseus-Pisces supercluster excess.

Original language	English
Article number	302
Journal	Proceedings of Science
Volume	501
DOIs	https://doi.org/10.22323/1.501.0302
State	Published - 30 Dec 2025
Event	39th International Cosmic Ray Conference, ICRC 2025 - Geneva, Switzerland Duration: 15 Jul 2025 → 24 Jul 2025

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10.22323/1.501.0302

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@article{bb6b95b7e1744d82a84b133bfa04638a,

title = "Medium-scale anisotropies measured by Telescope Array surface detectors",

abstract = "The Telescope Array (TA) experiment, the largest observatory for ultra-high energy cosmic rays in the Northern Hemisphere, has identified two medium-scale anisotropies: the TA Hotspot near the constellation Ursa Major and an excess in the direction of the Perseus-Pisces supercluster. Studying these medium-scale anisotropies may provide insights into the origins of ultra-high energy cosmic rays. This presentation will explore an oversampling analysis of TA surface detector data to evaluate these medium-scale event excesses and will present the latest findings on the TA Hotspot and the Perseus-Pisces supercluster excess.",

author = "\{Telescope Array Collaboration\} and Abbasi, \{R. U.\} and T. Abu-Zayyad and M. Allen and Belz, \{J. W.\} and Bergman, \{D. R.\} and F. Bradfield and I. Buckland and W. Campbell and Cheon, \{B. G.\} and K. Endo and A. Fedynitch and T. Fujii and K. Fujisue and K. Fujita and M. Fukushima and G. Furlich and Z. Gerber and N. Globus and T. Hanaoka and W. Hanlon and N. Hayashida and H. He and K. Hibino and R. Higuchi and D. Ikeda and D. Ivanov and S. Jeong and Jui, \{C. C.H.\} and K. Kadota and F. Kakimoto and O. Kalashev and K. Kasahara and Y. Kawachi and K. Kawata and I. Kharuk and E. Kido and Kim, \{H. B.\} and Kim, \{J. H.\} and Kim, \{S. W.\} and R. Kobo and I. Komae and K. Komatsu and K. Komori and A. Korochkin and C. Koyama and M. Kudenko and M. Kuroiwa and Y. Kusumori and M. Kuznetsov and Lee, \{M. J.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s); 39th International Cosmic Ray Conference, ICRC 2025 ; Conference date: 15-07-2025 Through 24-07-2025",

year = "2025",

month = dec,

day = "30",

doi = "10.22323/1.501.0302",

language = "English",

volume = "501",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Medium-scale anisotropies measured by Telescope Array surface detectors

AU - Telescope Array Collaboration

AU - Abbasi, R. U.

AU - Abu-Zayyad, T.

AU - Allen, M.

AU - Belz, J. W.

AU - Bergman, D. R.

AU - Bradfield, F.

AU - Buckland, I.

AU - Campbell, W.

AU - Cheon, B. G.

AU - Endo, K.

AU - Fedynitch, A.

AU - Fujii, T.

AU - Fujisue, K.

AU - Fujita, K.

AU - Fukushima, M.

AU - Furlich, G.

AU - Gerber, Z.

AU - Globus, N.

AU - Hanaoka, T.

AU - Hanlon, W.

AU - Hayashida, N.

AU - He, H.

AU - Hibino, K.

AU - Higuchi, R.

AU - Ikeda, D.

AU - Ivanov, D.

AU - Jeong, S.

AU - Jui, C. C.H.

AU - Kadota, K.

AU - Kakimoto, F.

AU - Kalashev, O.

AU - Kasahara, K.

AU - Kawachi, Y.

AU - Kawata, K.

AU - Kharuk, I.

AU - Kido, E.

AU - Kim, H. B.

AU - Kim, J. H.

AU - Kim, S. W.

AU - Kobo, R.

AU - Komae, I.

AU - Komatsu, K.

AU - Komori, K.

AU - Korochkin, A.

AU - Koyama, C.

AU - Kudenko, M.

AU - Kuroiwa, M.

AU - Kusumori, Y.

AU - Kuznetsov, M.

AU - Lee, M. J.

PY - 2025/12/30

Y1 - 2025/12/30

N2 - The Telescope Array (TA) experiment, the largest observatory for ultra-high energy cosmic rays in the Northern Hemisphere, has identified two medium-scale anisotropies: the TA Hotspot near the constellation Ursa Major and an excess in the direction of the Perseus-Pisces supercluster. Studying these medium-scale anisotropies may provide insights into the origins of ultra-high energy cosmic rays. This presentation will explore an oversampling analysis of TA surface detector data to evaluate these medium-scale event excesses and will present the latest findings on the TA Hotspot and the Perseus-Pisces supercluster excess.

AB - The Telescope Array (TA) experiment, the largest observatory for ultra-high energy cosmic rays in the Northern Hemisphere, has identified two medium-scale anisotropies: the TA Hotspot near the constellation Ursa Major and an excess in the direction of the Perseus-Pisces supercluster. Studying these medium-scale anisotropies may provide insights into the origins of ultra-high energy cosmic rays. This presentation will explore an oversampling analysis of TA surface detector data to evaluate these medium-scale event excesses and will present the latest findings on the TA Hotspot and the Perseus-Pisces supercluster excess.

UR - https://www.scopus.com/pages/publications/105029014065

U2 - 10.22323/1.501.0302

DO - 10.22323/1.501.0302

M3 - Conference article

AN - SCOPUS:105029014065

SN - 1824-8039

VL - 501

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 302

T2 - 39th International Cosmic Ray Conference, ICRC 2025

Y2 - 15 July 2025 through 24 July 2025

ER -

Medium-scale anisotropies measured by Telescope Array surface detectors

Abstract

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