A Flaring AGN In a ULIRG candidate in Stripe 82
  We report the discovery of a mid-infrared variable AGN which is hosted by an
ultraluminous infrared galaxy (ULIRG) candidate in the Sloan Stripe 82 field.
\textit{WISE} \textit{J030654.88+010833.6} is a red, extended galaxy, which we
estimate to be at a photometric redshift of 0.28 $\leq$ z $\leq$ 0.31, based on
its optical and near-infrared spectral energy distribution (SED). The factor of
two variability over 8 years seen in the \textit{WISE} 3.4 and 4.6 $\mu$m
wavelength channels is not clearly correlated with optical variability in
archival data. Based on our estimation of the physical parameters of the host
galaxy, \textit{J030654.88+010833.6} is possibly a composite AGN/starburst
ULIRG in a phase where high star formation $\sim$ 70 M$_{\odot}$ year$^{-1}$ is
occurring. Our estimate of the black hole mass to stellar mass ratio also
appears to be consistent with that of broad-line AGN in the local universe. The
long-term variability of \textit{J030654.88+010833.6} as seen in the
\textit{WISE} \textit{W1} and \textit{W2} light curves is likely due to
variations in the accretion rate, with the energy being reprocessed by dust in
the vicinity of the AGN.
