Multi-wavelength Temporal Variability of the Blazar 3C 454.3 during 2014
  Activity Phase
  We present a multi-wavelength temporal analysis of the blazar 3C 454.3 during
the high $\gamma$-ray active period from May-December, 2014. Except for X-rays,
the period is well sampled at near-infrared (NIR)-optical by the \emph{SMARTS}
facility and the source is detected continuously on daily timescale in the
\emph{Fermi}-LAT $\gamma$-ray band. The source exhibits diverse levels of
variability with many flaring/active states in the continuously sampled
$\gamma$-ray light curve which are also reflected in the NIR-optical light
curves and the sparsely sampled X-ray light curve by the \emph{Swift}-XRT.
Multi-band correlation analysis of this continuous segment during different
activity periods shows a change of state from no lags between IR and
$\gamma$-ray, optical and $\gamma$-ray, and IR and optical to a state where
$\gamma$-ray lags the IR/optical by $\sim$3 days. The results are consistent
with the previous studies of the same during various $\gamma$-ray flaring and
active episodes of the source. This consistency, in turn, suggests an extended
localized emission region with almost similar conditions during various
$\gamma$-ray activity states. On the other hand, the delay of $\gamma$-ray with
respect to IR/optical and a trend similar to IR/optical in X-rays along with
strong broadband correlations favor magnetic field related origin with X-ray
and $\gamma$-ray being inverse Comptonized of IR/optical photons and external
radiation field, respectively.
