摘要
元素丰度与星系演化(Stellar Abundance and Galactic Evolution,SAGE)是自主设计的能够准确计算恒星大气参数以及消光的新测光系统。对北天除银盘外共计约12 000 deg2的天区开展了SAGE系统测光巡天,计划获取约5亿颗恒星的高精度测光数据。单次曝光条件下100σ完备星等uSC～17. 3,vSAGE～16. 8(AB星等),这些为研究银河系提供宝贵的测光资料。介绍了巡天专用的数据处理程序的研究和开发,主要研究了针对单幅图像的快速自动化处理过程,重点介绍数据改正、天体测量校正、测光和流量定标过程,以及数据结果和数据质量检测等。
Stellar Abundance and Galactic Evolution(SAGE)photometric system is a self-designed system,which can provide accurate stellar atmosphere parameters and extinction.The actual 100σdepths of the single-epoch images are u SC^17.3 and v SAGE^16.8(AB magnitude).We are performing a SAGE photometric sky survey of the northern sky,covering about 12000 squared degrees and over 500 million stars.This will be valuable data in research of the Milky Way.This paper introduces the research and development of the pipeline for the survey,particularly the data reduction process of a single exposure.The procedures include bias and flat correction,astrometric calibration,photometry and flux calibration.This paper also introduces the main results and data quality produced by the pipeline.
作者
郑捷
赵刚
王炜
范舟
赵景昆
谈克峰
Zheng Jie;Zhao Gang;Wang Wei;Fan Zhou;Zhao Jingkun;Tan Kefeng(Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049;Chinese Academy of Sciences South America Center for Astronomy,China-Chile Joint Center for Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101)
出处
《天文研究与技术》
CSCD
2019年第1期93-106,共14页
Astronomical Research & Technology
基金
国家自然科学基金(11373003)
国家自然科学天文联合基金(U1631102)
国家重点基础研究发展计划(2015CB857002)资助
作者简介
郑捷,男,博士研究生.研究方向:天文测光巡天观测与数据处理.Email:jiezheng@nao.cas.cn;通讯作者:赵刚,男,研究员.研究方向:银河系科学,恒星物理.Email:gzhao@nao.cas.cn
