  The sulfur dimer (S$_2$) is an important molecular constituent in cometary
atmospheres and volcanic plumes on Jupiter's moon Io. It is also expected to
play an important role in the photochemistry of exoplanets. The UV spectrum of
S$_2$ contains transitions between vibronic levels above and below the
dissociation limit, giving rise to a distinctive spectral signature. By using
spectroscopic information from the literature, and the spectral simulation
program PGOPHER, a UV line list of S$_2$ is provided. This line list includes
the primary $B\,^{3}\Sigma^{-}_{u}-X\,^{3}\Sigma^{-}_{g}$ ($v'$=0-27,
$v''$=0-10) electronic transition, where vibrational bands with $v'$$\geq$10
are predissociated. Intensities have been calculated from existing experimental
and theoretical oscillator strengths, and semi-empirical strengths for the
predissociated bands of S$_2$ have been derived from comparisons with
experimental cross-sections. The S$_2$ line list also includes the
$B''\,^{3}\Pi_{u}-X\,^{3}\Sigma^{-}_{g}$ ($v'$=0-19, $v''$=0-10) vibronic bands
due to the strong interaction with the $B$ state. In summary, we present the
new HITRAN-formatted S$_2$ line list and its validation against existing
laboratory spectra. The extensive line list covers the spectral range
21700$-$41300~cm$^{-1}$ ($\sim$242$-$461~nm) and can be used for modeling both
absorption and emission.
