Volume 501 - 39th International Cosmic Ray Conference (ICRC2025) - Cosmic-Ray Indirect
Medium-scale anisotropies measured by Telescope Array surface detectors
J. Kim*, D. Ivanov, K. Kawata, H. Sagawa, G. Thomson and  On behalf of the Telescope Array collaboration
*: corresponding author
Full text: pdf
Pre-published on: September 23, 2025
Published on: December 30, 2025
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.
DOI: https://doi.org/10.22323/1.501.0302
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