1. Department of Astronomy, Yunnan University , Kunming, 650091, People’s Republic of China
2. Indian Institute of Space Science and Technology , Thiruvananthapuram 695 547, Kerala, India
3. Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People’s Republic of China
4. Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People’s Republic of China
5. Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
6. Departamento de Astronomía , Universidad de Concepción, Av. Esteban Iturra s/n, Distrito Universitario, 160-C, Chile
7. Max-Planck-Institute for Astronomy , Königstuhl 17, D-69117 Heidelberg, Germany
8. Department of Physics , PO box 64, FI-00014, University of Helsinki, Finland
9. Kavli Institute for Astronomy and Astrophysics, Peking University , 5 Yiheyuan Road, Haidian District, Beijing 100871, People’s Republic of China
10. Department of Astronomy, Peking University , 100871, Beijing, People’s Republic of China
11. Departamento de Astronomía, Universidad de Chile , Las Condes, Santiago, Chile
12. Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA
13. Korea Astronomy and Space Science Institute , 776 Daedeokdaero, Yuseong-gu, Daejeon 34055, Republic of Korea
14. Indian Institute of Astrophysics , Koramangala II Block, Bangalore 560 034, India
15. National Astronomical Observatory of Japan , National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
16. Satyendra Nath Bose National Centre for Basic Sciences , Block-JD, Sector-III, Salt Lake, Kolkata-700 106, India
17. Physical Research Laboratory , Navrangpura, Ahmedabad-380 009, India
18. School of Physics and Astronomy, Sun Yat-sen University , 2 Daxue Road, Zhuhai, Guangdong, 519082, People’s Republic of China
19. University of Science and Technology , Korea (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
20. National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, China
21. SOFIA Science Centre , USRA, NASA Ames Research Centre, MS-12, N232, Moffett Field, CA 94035, USA