\begin{table}%t5[t!]
\caption{Physical parameters derived from the best fit Sedov model results.}
\label{tab:param}
%\centerline
{
\begin{tabular}{lcccccc}
\hline\hline
SNR      &  $n_{\rm e}$    &  $n_{\rm H}$     & $t_{\rm i}$   & $t_{\rm dyn}$   
  & Mass    &  $E_{0}$  \\ 
         &\multicolumn{2}{c}{($10^{6}$ m$^{-3}$)} & ($10^{3}$ yrs) & ($10^{3}$ 
yrs) & ($M_{\odot}$) &  ($10^{44}$ J) \\ \hline 
 DEM S~32  &  0.05 &0.05 &	 15    &      6   &   43      &    0.9     \\
 IKT~2      &  0.45 &0.44 &   $>$34    &      5.4 &   47      &    0.3     \\
 HFPK~419   &  0.26 &0.25 &   $>$50   &     8.5   &  64      &    0.6     \\
 IKT~6-outer&  0.21 &0.17 &	18    &      14  &   180      &    0.8     \\
 IKT~16     &  0.05 &0.04 &	3.5   &       7.5  &   124      &    3.4     \\
 IKT~18     &  0.13 &0.11 &	23    &      11  &   196      &    1.2     \\
 IKT~22     &  2.03 &1.68 &    1.4    &      2.7 &   84       &    0.8  \\
 IKT~23-outer&  0.19 &0.16 &	30    &      19  &   424      &    1.8     \\
 \hline
\end{tabular}}
\end{table}