7th International Symposium on Ultra High Energy Cosmic Rays (UHECR) 2024

Search for magnetic deflection multiplets in the observed data by the Telescope Array surface detectors

Not scheduled

20m

Canelo Room ( Thesaurus Convention and Exhibition Centre)

Talk

Speaker

Eiji Kido (Institute for Cosmic Ray Research, University of Tokyo)

Description

We searched for magnetic structures known as multiplets caused by magnetic deflection of ultra high energy cosmic rays in the 15 years of cosmic ray observation data from the surface detectors of the Telescope Array (TA) experiment. In this data analysis, we specifically investigated the TA hotspot in detail by using data above 57 EeV and applying the maximum likelihood estimation method to search for a multiplet. As a result, we found a multiplet in the TA hotspot and were able to estimate the direction of the cosmic ray source. Furthermore, it was found that the error region for the estimated direction of the cosmic ray source is significantly smaller than that of the previous analysis using five years of observation data.