1. The Stellar Abundances and Galactic Evolution Survey (SAGES) -- -- I. General Description and the First Data Release (DR1)
- Author
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Fan, Zhou, Zhao, Gang, Wang, Wei, Zheng, Jie, Zhao, Jingkun, Li, Chun, Chen, Yuqin, Yuan, Haibo, Li, Haining, Tan, Kefeng, Song, Yihan, Zuo, Fang, Huang, Yang, Luo, Ali, Esamdin, Ali, Ma, Lu, Li, Bin, Song, Nan, Grupp, Frank, Zhao, Haibin, Ehgamberdiev, Shuhrat A., Burkhonov, Otabek A., Feng, Guojie, Bai, Chunhai, Zhang, Xuan, Niu, Hubiao, Khodjaev, Alisher S., Khafizov, Bakhodir M., Asfandiyarov, Ildar M., Shaymanov, Asadulla M., Karimov, Rivkat G., Yuldashev, Qudratillo, Lu, Hao, Zhaori, Getu, Hong, Renquan, Hu, Longfei, Liu, Yujuan, and Xu, Zhijian
- Subjects
Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics - Abstract
The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically-designed multi-band photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution optical spectra. It was carried out with the 2.3-m Bok telescope of Steward Observatory and three other telescopes. The observations in the $u_s$ and $v_s$ passband produced over 36,092 frames of images in total, covering a sky area of $\sim9960$ degree$^2$. The median survey completeness of all observing fields for the two bands are of $u_{\rm s}=20.4$ mag and $v_s=20.3$ mag, respectively, while the limiting magnitudes with signal-to-noise ratio (S/N) of 100 are $u_s\sim17$ mag and $v_s\sim18$ mag, correspondingly. We combined our catalog with the data release 1 (DR1) of the first of Panoramic Survey Telescope And Rapid Response System (Pan-STARRS1, PS1) catalog, and obtained a total of 48,553,987 sources which have at least one photometric measurement in each of the SAGES $u_s$ and $v_s$ and PS1 $grizy$ passbands, which is the DR1 of SAGES and it will be released in our paper. We compare our $gri$ point-source photometry with those of PS1 and found an RMS scatter of $\sim2$% in difference of PS1 and SAGES for the same band. We estimated an internal photometric precision of SAGES to be on the order of $\sim1$%. Astrometric precision is better than $0^{\prime\prime}.2$ based on comparison with the DR1 of Gaia mission. In this paper, we also describe the final end-user database, and provide some science applications., Comment: 49 pages, 21 figures, 5 table, accepted for publication in ApJS
- Published
- 2023