应用天文研究组知识库

利用云南天文台1.2 m望远镜多色测光系统,选取一批Landolt标准星,利用较差测量的方法对该系统进行了大气消光系数和仪器转换系数的测定,分析了这套新的测光系统的性能。计算结果表明本系统与Johnson标准测光系统非常接近。同时也对该系统的测光精度进行了测定,在标准测光夜下测量亮于13.5等的星时,其V波段测光精度可达到0.041星等。

This paper studies the photometric accuracies of the YNAO 1.2m telescope. The equations to transform observed magnitudes to the standard system are established by observing a set of Landolt standard stars. The relations between transformed magnitudes and standard magnitudes are also discussed. Our results show that the photometric system of the 1. 2m telescope is very close to the standard Johnson system. The paper finally lists the photometric precisions. The results indicate that the measurement precision of the V band is 0.041 mag for objects brighter than 13.5 mag under photometric conditions.