\begin{table}%t4
\caption{\label{tab4}Best fit parameters of the spectral energy distribution of the non-thermal emission from the Ophiuchus cluster.}
%\centerline
{\small
\begin{tabular}{ccc}
\hline\hline
Parameter &     Value          & Description \\
\hline\noalign{\smallskip}
$K_0$         & $\rm 0.53^{+6.16}_{-0.52}$ ~~cm$^{-3}$ & Energy spectrum normalization\\[1mm]
$p$           & $\rm 3.83^{+0.38}_{-0.44}$        & Energy spectrum index \\[1mm]
$\gamma_{\rm min}$ & $\lesssim $$700$; fixed to 300         & Low-energy cut-off\\[1mm]
$\gamma_{\rm max}$ &  $\rm 3.83_{0.66}^{+3.16} \times 10^4$        & High-energy cut-off\\[1mm]
$B_{\rm V}$       & $\rm 0.31^{+0.11}_{-0.07}$  ~~$\mu $G & Volume-averaged magnetic field\\[1mm]
$\chi^2$/d.o.f.  & 0.36/4               &\\
\hline
\end{tabular}}
\tablefoot{The reported uncertainties are at 1$\sigma$ level.}
\end{table}