The SAGE photometric survey: technical description. (December 2018)

• Record Type: Journal Article
• Authors: Zheng, Jie; Zhao, Gang; Wang, Wei; Fan, Zhou; Tan, Ke-Feng; Li, Chun; Zuo, Fang
• Is Part Of: Research in astronomy and astrophysics. Volume 18:Number 12(2018:Dec.)
• Publication Date: 2018-12
• Subjects: methods: observational -- techniques: photometric -- surveys -- astrometry -- catalogs; Astronomy -- Periodicals; Astrophysics -- Periodicals; 520.5
• DOI: 10.1088/1674-4527/18/12/147
• Languages: English
• ISSNs: 1674-4527

Abstract

Abstract: To investigate a huge sample of data related to the Stellar Abundance and Galactic Evolution (SAGE) survey in more detail, we are performing a northern sky photometric survey named SAGES with the SAGE photometric system. This system consists of eight filters: Strӧmgren- u, SAGE- v, SDSS g, r, i, DDO-51, H α wide and H α narrow, including three Sloan broadband filters, three intermediate-band filters, two narrow-band filters and one newly-designed narrow-band filter. SAGES covers ∼12 000 square degrees of the northern sky with δ > −5°, excluding the Galactic disk (| b | < 10°) and the sky area 12 h < RA < 18 h. The photometric detection limit depth at signal-to-noise ratio 5 σ can be as deep as V ∼20 mag. SAGES will produce a photometric catalog with uniform depth for ∼500 million stars with atmospheric parameters including effective temperature T eff, surface gravity log g and metallicity [Fe/H], as well as interstellar extinction to each individual target. In this work, we will briefly introduce the SAGE photometric system, the SAGE survey and a preliminary test field of the open cluster NGC 6791 and its surroundings.