【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。更多还原

【Abstract】 <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.更多还原