摘要
利用北京天文台施密特望远镜ＣＣＤ类星体多色测光巡天中的１５次观测，以ＮＰＭ星表作为参考星表和底片常数法进行处理，得到３颗河外射电源０８５１＋２０２，１２２８＋１２６，１７４９＋７０１的光学位置。文中分析比较了ＩＲＡＦ软件中计算星象中心的三种方法；同时提出应根据待测星的星等（或星象的半峰宽度）选择合适的采样范围。
Using the plate-constant-method and taking the NPM as reference catalogue, optical positions of radio sources 0851+202, 1228+126 and 1749+701 are determined with 15 observations which were choosed from the CCD quasar-multi-colour photometry survey of Schmidt telescope in Beijing Observatory. In this paper, three methods to determine the centers of star images are analysed and compared. In addition, It is presented that it should be better to choose the appropriate sampling range to compute the centers of star images, which is based on the magnitude(or half-peak width). The comparison between our results and radio positions are also given.
出处
《云南天文台台刊》
CSCD
1998年第3期40-43,共4页
Publications of the Yunnan Observatoty
基金
国家自然科学基金
