Work

Optical properties of the fluorescence detector in the Telescope Array experiment using the Opt-copter

Year: 2025

Type: conference-paper

Abstract: The Opt-copter was developed as a calibration device for the FDs. The Opt-copter is equipped with a UV LED light source and a Real-Time Kinematic GPS (RTK-GPS) module for precise positioning. Using the Opt-copter, the pointing direction analysis of all 38 TA-FDs at the three stations has been completed using the Opt-copter. As a result, the elevation shifts showed different tendencies at each station. Similar shifts were observed among FDs pointing in similar directions, even if located at different stations about 35 km apart. This suggests that systematic effects may have been introduced by the types and motions of stars observed by FDs. The overall uncertainty of this analysis was estimated to be 0.03°.

Source: International Cosmic Ray Conference

DOI: 10.22323/1.501.0330

Authors: Aoi Matsuzawa, Takayuki Tomida, Daiki Sato, Yuichiro Tameda, Daisuke Ikeda, John Matthews

Institutions: Purple Mountain Observatory, Shinshu University, University of Utah, Osaka Electro-Communication University, Kanagawa University

Language: English

Topic: Astronomy and Astrophysical Research

Subfield: Instrumentation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Science Foundation, University of Utah, European Commission, National Research Foundation, Academia Sinica, 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, G3810236772, G4396925471, 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, G8667551286, 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, G948983577

OpenAlex ID: W4414486916

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