The Stellar Abundances and Galactic Evolution Survey (SAGES). I. General Description and the First Data Release (DR1)

作者：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, A***ulla M.; Karimov, Rivkat G.; Yuldashev, Qudratillo; Lu, Hao

来源：Astrophysical Journal, Supplement Series, 2023, 268(1): 9.

DOI：10.3847/1538-4365/ace04a

• DIGITAL SKY SURVEY
• DARK-MATTER HALOES
• PHOTOMETRIC CALIBRATION
• COLOR REGRESSION
• METALLICITY DISTRIBUTION
• EXTINCTION COEFFICIENTS
• WHITE-DWARFS
• DUSTY VEIL
• NIGHT-SKY
• STARS

The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically designed multiband 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 & SIM;9960 deg(2). The median survey completenesses of all observing fields for the two bands are u (s) = 20.4 mag and v ( s ) = 20.3 mag, respectively, while the limiting magnitudes with signal-to-noise ratio of 100 are u ( s ) & SIM; 17 mag and v ( s ) & SIM; 18 mag, correspondingly. We combined our catalog with the data release 1 (DR1) of the first Panoramic Survey Telescope And Rapid Response System (Pan-STARRS, PS1) catalog, and obtained a total of 48,553,987 sources that have at least one photometric measurement in each of the SAGES u ( s ) and v ( s ) and PS1 grizy passbands. This is the DR1 of SAGES, released in this paper. We compared our gri point-source photometry with those of PS1 and found an rms scatter of & SIM;2% difference between PS1 and SAGES for the same band. We estimated an internal photometric precision of SAGES to be of the order of & SIM;1%. Astrometric precision is better than 0.& DPRIME;2 based on comparison with DR1 of the Gaia mission. In this paper, we also describe the final end-user database, and provide some science applications.

• 单位
  中国科学院研究生院