1. Institute of Science and Engineering, Kanazawa University, Kanazawa, Japan
2. Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan
3. Astronomical Observatory, Kyoto University, Kyoto, Japan
4. Department of Astronomy, Kyoto University, Kyoto, Japan
5. Department of Mechanical Engineering, Osaka University, Suita, Osaka, Japan