Unveiling the Nature of an X-ray flare from 3XMM J014528.9+610729: A
  candidate spiral galaxy
  We report an X-ray flare from 3XMM J014528.9+610729, serendipitously detected
during the observation of the open star cluster NGC 663. The colour-colour
space technique using optical and infrared data reveals the X-ray source as a
candidate spiral galaxy. The flare shows fast rise and exponential decay shape
with a ratio of the peak and the quiescent count rates of $\sim$60 and duration
of $\sim$5.4 ks. The spectrum during the flaring state is well fitted with a
combination of thermal ({\sc Apec}) model with a plasma temperature of
$\rm{1.3\pm0.1}$ keV and non-thermal ({\sc Power-law}) model with power-law
index of $\rm{1.9\pm0.2}$. However, no firm conclusion can be made for the
spectrum during the quiescent state. The temporal behavior, plasma temperature
and spectral evolution during flare suggest that the flare from 3XMM
J014528.9+610729 can not be associated with tidal disruption events.
