CCD测光孔径参数研究

Research for Aperturein CCD Photometry

在CCD测光中,用IRAF软件处理数据时,其参数设置对测光结果的误差有很大的影响。我们用的是上海天文台1.56m望远镜对BL Lac天体3C66AI波段的观测资料,在参数设置研究中,获得了孔径这个参数与仪器星等误差的关系,最终得到了孔径参数的最佳估计值及其误差。

Parameter setting in IRAF has great effect on the error of photometric results in CCD photometry. We used the material of the BL Lac object 3C66A at I band observed with the 1. 56m telescope of Shanghai Astronomical observatory, and obtained the relation between aperture and instumental magnitude error in research for parameter setting. At last, we got the best val- ue and error of aperture.