Speaker
Description
Ultra-high energy cosmic rays (UHECRs) are highly energetic charged particles originating from extragalactic sources, with energies exceeding $10^{18}$ eV. Elucidating the origin of UHECRs is a critical scientific objective. One approach is analyzing their arrival direction distribution for evidence of anisotropy. The Telescope Array (TA) experiment, the largest UHECR observatory in the Northern Hemisphere, has detected evidence of two medium-scale anisotropies: the TA hotspot in the constellation of Ursa Major and an excess in the direction of the Perseus-Pisces supercluster. This presentation will detail an oversampling analysis using TA surface detector data to identify event excesses. We will present the latest findings regarding the TA hotspot and the Perseus-Pisces supercluster excess.
