\begin{table}%t3
%\centering
\par
\caption {\label{model}Parameters used in the emission model to reproduce the SEDs
of 3C~454.3 in July (first row) and November (second row)
2007. $\Gamma$: bulk Lorentz factor of the emission region; $B$:
magnetic field, in units of [G]; $K$: density of the relativistic
electrons, in units of [cm$^{-3}$]; $n_1$ and $n_2$: low and high
energy slope of the electron energy distribution; $\gamma _{\rm min}$,
$\gamma _b$ and $\gamma _{\rm max}$: minimum energy, break energy and
maximum energy of the electron energy distribution; $R$: radius of the
emission region, in units of [$10^{15}$~cm]. See text for more
details.}
\begin{tabular}{ccccccccc}
\hline\hline
$\Gamma$ & $B$ & $K$ & $n_1$& $n_2$& $\gamma _{\rm min}$& $\gamma _b$ & $\gamma _{\rm max}$& $R$\\
\hline
 18.4& 3.1& $5\times 10^5$& 1.9 & 3.6& 85& 500& $6.5\times 10^3$& $6.5$\\
 17.8& 5& $5\times 10^5$& 1.9 & 3.9& 80& 500& $3.9\times 10^3$& $5$\\
\hline
\end{tabular}
\end{table}