\begin{table}%t2
\caption{\label{T:tab1}Inferred values of the downstream magnetic field amplitude and synchrotron
photon cut-off energy in the case of an {\it advection-dominated} rim where Bohm diffusion regime prevails ($\beta=1$ and $q(\beta=1)=\sigma$).}
%\centering
\par
\begin{tabular}{cccc}
\hline \hline \noalign{\smallskip}
 Supernova remnant &   $B_{\rm d} \ (\mu G)$ &  $\displaystyle \frac{E_{\rm\gamma-cut}}{E_{\rm\gamma-cut,obs}}$ &  $B_{\rm d-FII}\ (mG)$ \\ \noalign{\smallskip} 
 \hline
Cas A & $558$ & $0.2$ & $2.7$ \\ 
Kepler & $433$ &  $0.3$ & $2.3$ \\ 
Tycho & $586$ & $0.7$ & $1.5$ \\ 
SN 1006 & $170$ & $0.07$ & $0.56$ \\
G347.3-0.5 & $131$ & $0.05 $ &  $2.1$ \\ 
\hline
\end{tabular}
\tablefoot {The magnetic field values were calculated by assuming  $r_{\rm tot}=r_{\rm sub} = 4$.}
\end{table}