Search for molecular bremsstrahlung radiation signals in Ku band with coincidental operations of radio telescopes with air shower detectors
1 Graduate School of Science, Osaka City University, Osaka 558-8585, Japan
2 Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
3 Institute for Cosmic Ray Research, University of Tokyo, Kashiwa-shi, Chiba 277-8582, Japan
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Microwave radiation from extensive air showers is expected to provide a new technique to observe UHECR. We insatlled and operate radio telescopes in Osaka and at Telescope Array site in Utah, USA. In Osaka, we are coincidentally operating two Ku band radio telescopes with an air shower array which consists of nine plastic scintillators with about 10 m separation. In Utah, we installed two telescopes just beside the Black Rock Mesa fluorescence detector (FD) station of the Telescope Array experiment, and we operated the radio telescopes coincidentally with FD event triggers. We report the experimental setups and the results of these measurements.
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