Preliminary results of solving the problem of geometric distortion for the 2.4 m telescope at Yunnan Observatory

作     者：Qing-Feng Zhang Qing-Yu Peng Zi Zhu 

作者机构：Department of Computer Science Jinan University Guangzhou 510632 China Key Laboratory of Modem Astronomy and Astrophysics (Nanjing University) Ministry ofEducation Nanjing 210032 China Sino-French Joint Laboratory for Astrometry Dynamics and Space Science Jinan UniversityGuangzhou 510632 China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2012年第12卷第10期

页      面：1451-1456页

核心收录：

学科分类：07[理学] 08[工学] 080203[工学-机械设计及理论] 070401[理学-天体物理] 0802[工学-机械工程] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos. 10973007, 11273014) the open fund of the Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, China 

主　　题：astrometry    methods: data analysis    techniques: image processing 

摘      要：We observed the open clusters NGC 1664 （43 exposures） and M35 （42 ex- posures） by the Yunnan Faint Object Spectrograph and Camera in the 2.4 m telescope at Yunnan Astronomical Observatory on 2011 January 3, and processed them by a method recently proposed by us. The result shows that there is a geometric distortion effect in the field of view and the maximum distortion is - 0.25 （i.e. 1 pixel）. After correcting the geometric distortion, the precision of stellar positional measurement is significantly improved. The best precision in each direction is 6 mas for well-exposed stars.