Photometric calibration of the Stellar Abundance and Galactic Evolution Survey (SAGES): Nanshan One-meter Wide-field Telescope g, r, and i band imaging data

作者：Kai Xiao, Haibo Yuan, Bowen Huang, Shuai Xu, Jie Zheng, Chun Li, Zhou Fan, Wei Wang, Gang Zhao, Guojie Feng, Xuan Zhang, Jinzhong Liu, Ruoyi Zhang, Lin Yang, Yu Zhang, Chunhai Bai, Hubiao Niu, Ali Esamdin, Lu Ma · 发表于：Chinese Science Bulletin (Chinese Version) · 年份：2023 · DOI：10.1360/tb-2023-0052 · 被引用次数：11 · 研究领域：Stellar, planetary, and galactic studies、Astronomy and Astrophysical Research、Gamma-ray bursts and supernovae

In recent years, there have been numerous wide-field imaging surveys conducted both domestically and internationally, which have had a revolutionary impact on astronomy. Uniform and accurate photometric calibration is very challenging and plays a key role in wide-field imaging surveys. The Nanshan One-meter Wide-field Telescope, with a 1.3° field of view, was used by the Stellar Abundance and Galactic Evolution Survey (SAGES) to image 4254 square degrees of the northern sky in three broadband filters (g, r, and i). In this paper, a total of approximately 2.6 million dwarf stars were constructed as standard stars, with an accuracy of about 0.01–0.02 magnitude for each band, by combining spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 7, photometric data from the corrected Gaia Early Data Release 3, and photometric metallicities obtained by Xu et al. Using the spectroscopy-based stellar color regression method (SCR method) and the photometric-based SCR method (SCR′ method), we performed the relative calibration of the Nanshan One-meter Wide-field Telescope imaging data of the SAGES survey. Based on the corrected Pan-STARRS DR1 (PS1) photometry, the absolute calibration was also performed, and the transform relationship between Nanshan One-meter Wide-field Telescope calibrated magnitudes and the corrected PS1 magnitudes was given. In the photometric calibration process, we analyzed the dependence of the calibration zero...