AST3图像相减测光模板系统设计  

Design of a System of Producing Photometric Reference Images for Image Subtraction for AST3

作　　者：康文东[1] 于策[1] 张旭明[1] 孙济洲[1] 商朝晖[2] 陈锦言[1] 曹玮[1] 

机构地区：[1]天津大学计算机科学与技术学院,天津300072 [2]天津师范大学天体物理中心,天津300387

出　　处：《天文研究与技术》2011年第2期153-158,共6页Astronomical Research & Technology

基　　金：国家自然科学基金(10978016;11003027);天津市科技支撑重点项目(09ZCKFGX00400)资助

摘　　要：AST3是将要安装于位于南极内陆冰穹A的昆仑站的3台口径50 cm的施密特望远镜,寻找变源(尤其是瞬间变源)是其科考目标之一,需要通过图像相减测光方法实现。首先需要根据初期的观测数据生成标准模板图像,而后在长期观测过程中,将模板图像与新观测到的图像进行相减测光处理,从而发现变源。模板在观测中起着举足轻重的作用,给出了模板制作的流程,并且验证了其可实现性和功能的正确性。The Three Antarctic Schmidt Telescopes （AST3）will be installed at the South-Pole Kunlun Station located at the Antarctic Dome A. One purpose of AST3 is to search for variable objects by the method of image subtraction. The first step of image subtraction is to produce a photometric reference image. Images obtained from follow-up long-time observations are subtracted by corresponding reference images, which can make the variable objects stand out. Reference images play important roles in image subtraction. This paper describes an elaborated production process of reference images and validates its effectiveness.

关 键 词：AST3 漂移扫描 定点跟踪观测 模板 图像叠加 图像相减 

分 类 号：P141.2[天文地球—天体物理]