1. Department of Physics, Kyoto University, Kitashirakawa-Oiwake-cho , Sakyo-ku, Kyoto, Kyoto 606-8502 , Japan
2. RIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako, Saitama 351-0198 , Japan
3. ALMA Project, NAOJ , NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 , Japan
4. Laboratory for Atmospheric and Space Physics, University of Colorado Boulder , 3665 Discovery Drive, Boulder, CO 80303 , USA
5. National Solar Observatory , 3665 Discovery Drive, Boulder, CO 80303 , USA
6. Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo , 407-2 Nichigaichi, Sayo-cho, Hyogo 679-5313 , Japan
7. Okayama Branch Office , Subaru Telescope, NAOJ, NINS, 3037-5 Honjou, Kamogata, Asakuchi, Okayama 719-0232 , Japan
8. School of Earth and Space Sciences, Peking University , Beijing 100871 , China
9. Department of Astronomy, Kyoto University , Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502 , Japan
10. Astronomical Observatory, Kyoto University , Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502 , Japan
11. Kwasan Observatory, Kyoto University , 17 Ohmine-cho Kita Kazan, Yamashina, Kyoto, Kyoto 607-8471 , Japan
12. School of Science and Engineering, Doshisha University , 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321 , Japan