The First Data Release of the Beijing-Arizona Sky Survey
Fan, Xiaohui; Jiang, Linhua; Cai, Zheng; Dey, Arjun; Zou, Hu; Nie, Jundan; Wang, Shu; Lang, Dustin; Schlegel, David; Yue, Minghao; Zhang, Tianmeng; Zhou, Xu; Mao, Shude; Ma, Jun; Jiang, Zhaoji; Wu, Xiaohan; McGreer, Ian; Zhou, Zhimin; Peng, Xiyan; Fan, Dongwei; Guo, Yucheng; He, Boliang; Lesser, Michael; Li, Zefeng; Shao, Yali; Wang, Jiali; Wu, Jin; Yang, Qian
China, United States, Canada, United Kingdom
Abstract
The Beijing-Arizona Sky Survey (BASS) is a new wide-field legacy imaging survey in the northern Galactic cap using the 2.3 m Bok telescope. The survey will cover about 5400 deg2 in the g and r bands, and the expected 5σ depths (corrected for the Galactic extinction) in these two bands are g = 24.0 and r = 23.4 mag (AB magnitude). BASS started observations in 2015 January and had completed about 41% of the area as of 2016 July. The first data release contains calibrated images obtained in 2015 and 2016 and their corresponding single-epoch and co-added catalogs. The actual depths of the single-epoch images are g ∼ 23.4 and r ∼ 22.9 mag. The full depths of the three epochs are g ∼ 24.1 and r ∼ 23.5 mag.