IRAF软件中DAOPHOT包的应用

An Application of the DAOPHOT Package in the IRAF

为了检验威海天文台1 m望远镜的测光精度,2009年10月7日晚用该望远镜观测了M39星团,并对观测数据进行测光归算。由于M39星团中个别星较密集,使用IRAF中的DAOPHOT包进行星像测光。详细介绍了IRAF软件中的DAOPHOT包及其使用。数据归算结果表明,在UCAC3星表中匹配到的星,稀疏区域亮星的星等内部精度达到0.003mag,较密集区域的暗星内部精度约为0.012 8 mag。

In order to evaluate the photometric precision of the 1 m telescope of the Weihai observatory,we carried out a test in which the open cluster M39 was observed in October 7,2009.As several stars are particularly crowded in M39,we used the DAOPHOT package in the IRAF to measure their luminosities and directions.This paper describes how to use the DAOPHOT package in detail.The results show that for the stars successfully matched to the UCAC3 catalog,the photometry of bright stars has an internal precision of 0.003 mag,and the photometry of faint stars in dense regions has an internal precision of 0.012 8 mag.