South Galactic Cap u-band Sky Survey (SCUSS): Data Release
  The SCUSS is a deep $u$-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$^2$ 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 ($5\sigma$)
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}.
