1. Amanogawa Galaxy Astronomy Research Center, Graduate School of Science and Engineering, Kagoshima University , 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065 , Japan
2. Center for General Education, Institute for Comprehensive Education, Kagoshima University , 1-21-30 Korimoto, Kagoshima, Kagoshima 890-0065 , Japan
3. Faculty of Science, Kagoshima University , 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065 , Japan
4. Graduate School of Science and Engineering, Kagoshima University , 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065 , Japan
5. Instituto de Astrofísica de Andalucía, CSIC, Glorieta de la Astronomía s/n , E-18008 Granada , Spain
6. Departamento de Astronomía, Universidad de Guanajuato , A.P. 144, 36000 Guanajuato, Gto. , Mexico
7. Department of Space, Earth and Environment, Chalmers University of Technology , Onsala Space Observatory, 439 92 Onsala , Sweden
8. Joint Institute for VLBI ERIC , Oude Hoogeveensedijk 4, 7991 PD Dwingeloo , the Netherlands
9. RIKEN Cluster for Pioneering Research , 2-1, Hirosawa, Wako-shi, Saitama 351-0198 , Japan
10. Department of Science, National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588 , Japan