The Stellar Abundances and Galactic Evolution Survey (SAGES) III -- The g/r/i-band Data Release

TL;DR

The SAGES III data release provides a comprehensive multi-band catalog covering over 4600 square degrees of the northern sky, enhancing resources for stellar and galactic studies, especially complementing SDSS data.

Contribution

This paper presents the data processing, catalog construction, and release of a large multi-band stellar catalog from the SAGES survey, covering a significant sky area with over 109 million sources.

Findings

Catalog covers ~4600 deg2 of sky.

Contains over 109 million source records.

Complements SDSS for bright star studies.

Abstract

The Stellar Abundances and Galactic Evolution Survey (SAGES) is a multi-band survey that covers the northern sky area of ~12000 deg2. Nanshan One-meter Wide-field Telescope (NOWT) of Xinjiang Astronomical Observatory (XAO) carried out observations on g/r/i bands. We present here the survey strategy, data processing, catalog construction, and database schema. The observations of NOWT started in 2016 August and was completed in 2018 January, total 17827 frames were obtained and ~4600 deg2 sky areas were covered. In this paper, we released the catalog of the data in the g/r/i bands observed with NOWT. In total, there are 109,197,578 items of the source records. The catalog is the supplement for the SDSS for the bright end, and the combination of our catalog and these catalogs could be helpful for source selections for other surveys and the Milky Way sciences, e.g., white dwarf candidates and stellar flares.