South Galactic Cap u-band Sky Survey (SCUSS): Data Release
Hu Zou, Xu Zhou, Zhaoji Jiang, Xiyan Peng, Dongwei Fan, Xiaohui Fan,, Zhou Fan, Boliang He, Yipeng Jing, Michael Lesser, Cheng Li, Jun Ma, Jundan, Nie, Shiyin Shen, Jiali Wang, Zhenyu Wu, Tianmeng Zhang, Zhimin Zhou

TL;DR
The SCUSS provides deep u-band imaging data over 4000 square degrees in the south Galactic cap, including calibrated images and catalogs, enabling studies of stellar motions and galaxy properties.
Contribution
This paper releases a comprehensive u-band survey dataset covering 4000 deg$^2$, with calibrated images and catalogs, filling a gap in deep sky surveys in the southern hemisphere.
Findings
Median seeing of 2".0 and magnitude limit of 23.2 mag.
Approximately 8 million objects with proper motion measurements.
Data accessible via dedicated online platform.
Abstract
The SCUSS is a deep -band imaging survey in the south Galactic cap using the 2.3m Bok telescope. The survey observations were completed in the end of 2013, covering an area of about 5000 square degrees. We release the data in the region with an area of about 4000 deg that is mostly covered by the Sloan digital sky survey. The data products contain calibrated single-epoch images, stacked images, photometric catalogs, and a catalog of star proper motions derived by Peng et al, 2015. The median seeing and magnitude limit () are about 2".0 and 23.2 mag, respectively. There are about 8 million objects having measurements of absolute proper motions. All the data and related documentations can be accessed through the SCUSS data release website of \url{http://batc.bao.ac.cn/Uband/data.html}.
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