赤道式天文望远镜极轴调整分析及观测结果  

On the Adjustment of the Polaraxis of an Equatorial Telescope

作　　者：何秋会[1] 孔大力[1] 刘岱钟[1] 

机构地区：[1]南京大学天文系

出　　处：《天文研究与技术》2010年第3期238-246,共9页Astronomical Research & Technology

基　　金：国家自然科学基金(10625313);科技部973项目(2009CB824800)资助

摘　　要：天文望远镜的指向精度和跟踪精度是评判一架天文望远镜的重要指标。赤道式天文望远镜的指向精度和跟踪精度受到极轴位置准确性的影响。正确地安装好极轴位置显得非常重要。极轴校正是一项很重要的工作。介绍了用观测恒星的方法来校正极轴位置,分析了合理地选择目标恒星,得出结论:在调整极轴东西方向时选择子午圈上的恒星作为观测目标恒星,在调整极轴俯仰方向时选择90°时角圈上的恒星作为观测目标恒星。经过多次调整极轴东西方向和极轴俯仰方向并对两个方向交替进行调整,望远镜的极轴将处于相当准确的位置。The pointing accuracy and the tracking accuracy are important indicators to evaluate an astronomical telescope.As for an equatorial telescope,they are affected by the alignment accuracy of the polaraxis.It is crucial to mount the polaraxis properly,and the axis calibration is also rather important.This paper introduces a method to calibrate the polaraxis alignment by using reference stars.Particularly,we give an analysis to reasonably choose reference stars.We conclude that reference stars need to be on the meridian plane when the east-west direction of the polaraxis is adjusted,but need to be on the 90° hour-circle plane when the pitching direction is adjusted.After several alternate adjustments in the two directions,the polaraxis of the telescope can be accurately aligned.

关 键 词：天文望远镜 极轴校正 仪器误差 

分 类 号：P113[天文地球—天文学]