[1] Hong Kong Univ Sci & Technol, HKUST Jockey Club Inst Adv Study, Kowloon, Hong Kong, Peoples R China
[2] Nanjing Univ, Sch Astron & Space Sci, Nanjing, Peoples R China
[3] Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing, Peoples R China
[4] Peking Univ, Sch Phys, Dept Astron, Beijing, Peoples R China
[5] Osaka Univ, Res Ctr Nucl Phys, Osaka, Japan
[6] Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou, Peoples R China
[7] Russian Acad Sci, PN Lebedev Phys Inst, Moscow, Russia