1. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
2. Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1, Canada
3. Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310027, China
4. Shanghai Astronomical Observatory, 80 Nandan Road, Xuhui District, Shanghai 200030, China
5. Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei 10617, Taiwan
6. School of Physics, Korea Institute for Advanced Study, 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea
7. Joetsu University of Education, Yamayashiki-machi, Joetsu, Niigata 943-8512, Japan
8. Sub-department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
9. School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, UK
10. Blackett Laboratory, Physics Department, Imperial College, London SW7 2AZ, UK
11. Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
12. National Central University, No. 300, Zhongda Rd., Zhongli District, Taoyuan City 32001, Taiwan
13. Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, South Korea
14. Tsinghua Center for Astrophysics and Physics Department, Tsinghua University, Beijing 100084, China
15. Scottish Universities Physics Alliance (SUPA), Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
16. Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, ul. Słoneczna 36, PL-60-286 Poznań, Poland
17. Jeremiah Horrocks Institute, University of Central Lancashire, Preston, Lancashire PR1 2HE, UK
18. Astronomy Centre, Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, UK
19. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
20. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China
21. National Astronomical Observatory of China, 20A Datun Road, Chaoyang District, Beijing 100012, China
22. Department of Physics and Astronomy and Centre for Planetary Science and Exploration, University of Western Ontario, London, ON N6A 3K7, Canada
23. Centre for Astrophysics Research, University of Hertfordshire, College Lane AL10 9AB, UK
24. Department of Astronomy, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea
25. Department of Astronomy and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China
26. Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming, 650011 Yunnan Province, China
27. Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA), Camino El Observatorio 1515, Las Condes, Santiago, Chile
28. Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile
29. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
30. Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
31. Subaru Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, HI 96720, USA
32. Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, China
33. Institute for Computational Cosmology, Physics Dept., Durham University, South Road, Durham DH1 3LE, UK
34. Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60201, USA
35. Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
36. Department of Physics and Astronomy, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, USA
37. East Asian Observatory, 660 North A’Ohoku Place, Hilo, Hawaii, 96720, USA
38. Department of Physics, Astronomy, Johns Hopkins University, Bloomberg Center, 3400 N. Charles St., Baltimore, MD 21218, USA
39. Department of Physics, Oberlin College, Oberlin, OH 44074, USA
40. School of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
41. Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
42. School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
43. Department of Earth Science Education, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41556, South Korea
44. Department of Physics, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, ON K7K 7B4, Canada