  We present the analysis of microlensing event OGLE-2014-BLG-0221, a planetary
candidate event discovered in 2014. The photometric light curve is best
described by a binary-lens single-source model. Our light curve modeling finds
two degenerate models, with event timescales of $t_\mathrm{E}\sim70$ days and
$\sim110$ days. These timescales are relatively long, indicating that the
discovered system would possess a substantial mass. The two models are similar
in their planetary parameters with a Jupiter mass ratio of $q \sim 10^{-3}$ and
a separation of $s \sim 1.1$. While the shorter timescale model shows marginal
detection of a microlensing parallax signal, the longer timescale model
requires a higher order effect of microlensing parallax, lens orbital motion or
xallarap to explain the deviation in the light curve. However, the modeling
shows significant correlation between the higher order effects and suffers the
ecliptic degeneracy that results in a failure to determine the parallax
parameters. Bayesian inference is used to estimate the physical parameters of
the lens, revealing the lens to be either a late-type star supported by the
shorter timescale model or a stellar remnant supported by the longer timescale
model. If the lens is a remnant, this would be the second planet found by
microlensing around a stellar remnant. Since the models predict different
values for relative proper motion and source flux, future high angular
resolution follow-up observations (e.g. Keck adaptive optics) are required to
rule out either of the models.
