The First Data Release of the Beijing-Arizona Sky Survey

Understand

The Beijing-Arizona Sky Survey (BASS) is a new wide-field legacy imaging survey in the northern Galactic cap using the 2.3m Bok telescope.

• The survey will cover about 5400 deg$^2$ in the $g$ and $r$ bands, and the expected 5$\sigma$ depths (corrected for the Galactic extinction) in the two bands are 24.0 and 23.4 mag, respectively.
• BASS started observations in January 2015, and has completed about 41% of the whole area as of July 2016.
• The first data release contains both calibrated images and photometric catalogs obtained in 2015 and 2016.