\begin{table}%t3
%\centering
\par
\caption{\label{t:panchro_fit}Best-fit model parameters of the multiwavelength fitting procedure of the afterglow light curves.}
\small  \begin{tabular}{rrrrrrrrrrrr}
 \hline  \hline  \noalign{\smallskip}
$\alpha_1$ & $t_{b1}$ & $\alpha_2$  & $t_{b2}$  & $\alpha_3$  & $t_{b3}$ & $\alpha_4$ & $n$ & $t_{\rm c}$
& $t_{\rm w}$ & $F_{\rm {\sc L},r}$ & $\chi^2$/d.o.f.\\
& (s)      &             &   (s)     &             & (ks)     &            &     & (ks)
                 &   (ks)      &     ($\mu$Jy)         &             \\[1.5mm]
\hline\noalign{\smallskip}
$-0.56_{-0.33}^{\rm +0.24}$ & $317_{-76}^{\rm +151}$ & $0.15_{-0.07}^{\rm +0.09}$ & $1456_{-46}^{\rm +67}$ &
$1.08\pm0.02$ & $23.8_{-3.1}^{\rm +3.2}$ & $3.51_{-0.34}^{\rm +0.37}$ & $5.4_{-1.3}^{\rm +1.9}$
& -- & -- & -- & $212/184$\\[1.5mm]
$-0.38_{-0.23}^{\rm +0.22}$ & $2480_{-900}^{\rm +1420}$ & $2.02_{-0.75}^{\rm +0.85}$ & -- &
-- & -- & -- & $0.49_{-0.28}^{\rm +0.61}$& $34.4_{-8.1}^{\rm +10.6}$ & $72.7_{-12.2}^{\rm +14.6}$ & $11.9_{-2.7}^{\rm +3.5}$ & $187/185$\\
 \hline
 \end{tabular}
\end{table}