1. Department of Astronomy, Tsinghua University , Beijing 100084, China
2. Center for Astrophysics | Harvard & Smithsonian 60 Garden St. , Cambridge, MA 02138, USA
3. Korea Astronomy and Space Science Institute , Daejon 34055, Republic of Korea
4. University of Science and Technology , Korea, (UST), 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea
5. Max-Planck-Institute for Astronomy , Königstuhl 17, D-69117 Heidelberg, Germany
6. Department of Astronomy, Ohio State University , 140 W. 18th Ave., Columbus, OH 43210, USA
7. Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan
8. National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, China
9. Kavli Institute for Astronomy and Astrophysics, Peking University , Yi He Yuan Road 5, Hai Dian District, Beijing 100871, China
10. University of Canterbury, Department of Physics and Astronomy , Private Bag 4800, Christchurch 8020, New Zealand
11. Department of Physics, Chungbuk National University , Cheongju 28644, Republic of Korea
12. Department of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 76100, Israel
13. School of Space Research, Kyung Hee University , Yongin, Kyeonggi 17104, Republic of Korea
14. School of Physics and Astronomy, Tel-Aviv University , Tel-Aviv 6997801, Israel
15. Department of Physics and Astronomy, Louisiana State University , Baton Rouge, LA 70803, USA
16. Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan
17. Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
18. Department of Astronomy, University of Maryland , College Park, MD 20742, USA
19. Institute of Natural and Mathematical Sciences, Massey University , Auckland 0745, New Zealand
20. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
21. Instituto de Astrofísica de Canarias , Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain
22. Department of Physics, The Catholic University of America , Washington, DC 20064, USA
23. Sorbonne Université, CNRS, Institut d’Astrophysique de Paris , IAP, F-75014 Paris, France
24. Department of Physics, University of Auckland , Private Bag 92019, Auckland, New Zealand
25. University of Canterbury Mt. John Observatory , PO Box 56, Lake Tekapo 8770, New Zealand