July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Calibration of a fluorescence detector using a flying standard light source for the Telescope Array observatory

Jul 30, 2015, 3:30 PM
Amazon Foyer (World Forum)

Amazon Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 169
Poster contribution CR-IN Poster 1 CR


Mr Motoki Hayashi (Shinshu University)


The main calibration items of Fluorescence Detector (FD) observation are the fluorescence yield, the atmospheric attenuation and the detector sensitivity. In 2012-2013, we conducted a joint TA-Auger calibration campaign by a flying device mounted with an ultraviolet LED as a standard light source. This device is called an octocopter, and was built by KIT. An octocopter has excellent portability and is suitable for calibration for FDs at a variety of remote locations. In TA FD observation of the octocopter, a difference in the number of detected photons between measurement and simulation is ± 5%, in the range of systematic error of the light source. In TA, we have begun developing a similar flying standard light source.  By mounting a high-performance GPS, the systematic errors of the measured light source position will be improved to less than 1 m. A photodiode mounted directly near the light source measures the relative light intensity of each pulse. We report the progress of development for the octocopter, and the analysis results of the joint calibration campaign using the previous octocopter.
Collaboration IceCube & Pierre Auger & Telescope Array
Registration number following "ICRC2015-I/" 1000

Primary authors

Mr Motoki Hayashi (Shinshu University) Takayuki Tomida (Shinshu University)


Yoshiki Tsunesada (Tokyo Institute of Technology) Yuichiro Tameda (Institute for Cosmic Ray Research, University of Tokyo)

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