\begin{table}%t1
\caption{\label{tab1}The value of $B_{\rm H}$~[G] for various data of Kerr parameter
and radiative efficiency.}
\small
%\centering
\par
\begin{tabular}{l l r r r}
\hline\hline
\noalign{\smallskip}
Source & $\delta_{\|};\delta_{\bot}$ & $\frac{a}{M_{\rm BH}}=0.5$ &
$\frac{a}{M_{\rm BH}}=0.998$ & $\frac{a}{M_{\rm BH}}=-0.9$\\
 & & $\varepsilon =0.081$ & $\varepsilon =0.32$ & $\varepsilon =0.039$\\
\hline
\noalign{\smallskip}
NGC~4258 & 41; 3.5 & $6.6\times 10^3$ & $4\times 10^3$ & $9.6\times 10^3$ \\
\hline
\end{tabular}
\end{table}