BATC测光系统的仪器效率测定  

The Measurement of Instrument Efficiency for the BATC Photometric System

作　　者：范璐璐[1] 彭昌[1] 周旭[2] 程福臻[1] 

机构地区：[1]中国科学技术大学天体物理中心,合肥230026 [2]中国科学院国家天文台,北京100012

出　　处：《天文研究与技术》2005年第2期122-129,共8页Astronomical Research & Technology

摘　　要：对文[2]的4颗流量标准星HD19445、HD84937、BD+17°4708和BD+26°2606中的2颗:HD19445和HD84937所在天区,用BATC15色测光系统中的14色滤光片(除b片外)进行测光。利用批处理程序PipelineI和PipelineⅡ对观测数据进行处理,并利用观测天区中标准星已知的BATC星等来确定天区内的其它恒星的BATC星等。我们估算出天光背景值,并寻找得到的信噪比与BATC星等mbatc以及曝光时间t之间的关系,最后得到三者之间的经验关系公式。<Abstrcat>Four Oke-Gunn(OG) standards,HD19445,HD84937,BD+17°4708 and BD+26°2606 are used as standard stars for flux calibration in the BATC project.We use the BATC 14-color filters among the BATC 15 intermediate-band filters (except b band) for photometry of the sky regions of the two standard stars:HD19445 and HD84937.We also use two automatic data reduction programs Pipeline I and Pipeline Ⅱ to process observational data and calibrate the BATC magnitudes of the other stars in the observed sky regions with the known BATC standard star.In this paper,we have evaluated the sky brightness,found the relationship among the signal-to-noise ratio,the BATC magnitudes and the exposure time,and got the experiential formula among the three quantities.

关 键 词：测光系统 效率测定 仪器 批处理程序 观测数据 曝光时间 经验关系 天区 滤光片 行处理 星等 背景值 信噪比 准星 恒星 

分 类 号：P315.7[天文地球—地震学] TB852.1[天文地球—固体地球物理学]