College of Physics and Information Engineering;
Hebei Normal University;
Shijiazhuang 050024;
China;
Key Laboratory of Optical Astronomy;
National Astronomical Observatories;
Chinese Academy of Sciences;
Beijing 100012;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
GEPI;
Observatoire de Paris-Meudon;
92195 Meudon;
France;
Physics Department and Tsinghua Center for Astrophysics;
Tsinghua University;
Beijing 100084;
China;
Astronomy Department;
Beijing Normal University;
Beijing 100875;
China;
Department of Physics;
Shijiazhuang University;
Shijiazhuang 050035;
China;