\begin{table}%t1
\caption{\label{tbl-1}Parameter study: effect of changing the $c_{\rm e}$ and $t_{\rm e}$ values on the flux emergence rate. Case~A corresponds to third row, case~B to the third column, while case~C  corresponds to the main diagonal of the table and case~D to the off-diagonal.}
\small
%\centering
\par
\begin{tabular}{cccccc}
\hline\hline
\par
     &&$\Delta t=$ & $10\;$min                &$30\;$min & $90\;$min  \\
\hline\noalign{\smallskip}
      &$-1$&    &$3.67\times10^{19}\;$Mx/s &$1.10\times10^{20}\;$Mx/s &$3.30\times10^{20}\;$Mx/s    \\
$c_{\rm e}=$&$-3$&    &$1.22\times10^{19}\;$Mx/s &$3.67\times10^{19}\;$Mx/s &$1.10\times10^{20}\;$Mx/s\\
      &$-9$&    &$4.07\times10^{18}\;$Mx/s &$1.22\times10^{19}\;$Mx/s &$3.67\times10^{19}\;$Mx/s\\
\hline
\end{tabular}
\end{table}