Institution: | 1. Institut d’Astrophysique Spatiale, Bât. 121, CNRS-Université Paris-Sud, F-91405 Orsay, France;2. Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing 210008, China;3. Department of Astronomy, Nanjing University, Nanjing 210093, China;4. LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon Cedex, France;5. CNES, 31055 Toulouse Cedex 4, France;6. Center for Space Science and Applied Research, Chinese Academy of Sciences, No. 1 Nanertiao, Zhongguancun, P.O. Box 8701, Beijing 100080, China |