Evaluation of the systematic uncertainties of the cosmic ray energy spectrum measured by the Telescope Array surface detector array
Year: 2025
Type: conference-paper
Abstract: The surface detector (SD) array of the Telescope Array (TA) experiment, covering an area of 700 km$^2$ with 507 plastic scintillators, observes ultra-high-energy cosmic rays (UHECRs). This study evaluates systematic uncertainties in the energy spectrum measured by the TA SD array, focusing on the impact of hadronic interaction models and primary mass composition. Additionally, we introduce a Bayesian forward-folding framework that incorporates various systematic effects into spectral reconstruction and illustrate the influence of spectral assumptions and composition modeling.
DOI: 10.22323/1.501.0259
Author: Kozo Fujisue
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, European Commission, National Research Foundation, National Research Foundation of Korea, University of Tokyo, Forskningsrådet om Hälsa, Arbetsliv och Välfärd, Ministry of Science and Higher Education of the Russian Federation, U.S. Air Force, U.S. Bureau of Land Management, Japan Society for the Promotion of Science, RIKEN, Institute for Cosmic Ray Research, University of Tokyo
Awards: G1192106470, Analysis of Data from the Telescope Array Observatory, Study of the ultra high energy cosmic ray source evolution by detailed measurement of cosmic rays in the wide energy range, Analysis of Data from the Telescope Array Observatory, G2464845396, Quest for the unified picture of the explosion mechanism of supernovae and the central engine of gamma-ray bursts, G2908002831, Investigating the Correlation Between Lightning and High-Energy Particles in the Earth's Atmosphere, G5260365489, G5281852683, Downward Gamma Ray Showers from Natural Lightning, G5629441754, Operation of the Telescope Array Observatory, G6444257319, G6554715000, Exploring energy spectrum anisotropies in ultra-high energy cosmic rays with the Telescope Array, Operation of the Telescope Array Observatory, The Microphysics of Lightning: Observing the Optical Emission from Downward Terrestrial Gamma-ray Flashes, Extended Telescope Array Experiment - Nearby Extreme Universe Elucidated by Highest-energy Cosmic Rays, Baseline Support of the University of Utah Cosmic Ray Physics Group Including Analysis of Telescope Array, TALE, and TAx4 Data, Operation of the Telescope Array, TALE, and the TAx4 Expansion by the University of Utah, Extreme Phenomena in the Universe Explored by Highest Energy Cosmic Rays, Study of origins and propagation of very high energy cosmic rays with detailed measurements in the wide energy range
OpenAlex ID: W4414420663
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