北京师范大学天文台大气消光的测定

DETERMINATION OF ATMOSPHERIC EXTINCTION IN ASTRONOMY OBSERVATORY OF BEIJING NORMAL UNIVERSITY

利用北京师范大学天文台的LX2 0 0型施密特 卡塞格林式望远镜及ST 7型CCD照相机 ,对该台的大气消光进行了实际观测 ,求出了当夜的东半天和西半天的大气消光因数K′分别为0 .5 86 ,0 .386 。

For celestial body observed from the ground, the result of photometry and spectroscope must be corrected because of atmospheric extinction. Using LX200 Schmidt Cassegrain telescope and ST 7 CCD camera, the observation of atmospheric extinction is carried out at Beijing Normal University observatory. The coefficient of atmospheric extinction K′ on the east and west side of the sky in that night is obtained, the value is separately 0.586 and 0.386. This offers reference for the atmospheric extinction correction of astronomical observation on that observatory in the future.