\begin{table}%t6
%\centering
\par
 \caption{Coefficients and $\chi^2$ obtained using different methods for time
          period $T = 1370$--1820~Myr. Units of $a$, $b$ and $\emf^0$ are [km~s$^{-1}$],
          [10$^{26}$~cm$^2$/s] and [km~s$^{-1}$ $\mu$G], respectively.
 \label{tab:method_compar}}
 \begin{tabular}{l|rrrrrrrr}
  \hline\hline
   Method & $a_{yx}$ & $a_{yy}$ & $a_{yz}$ & $b_{yxz}$ & $b_{yyz}$ & $b_{yzz}$ & $\emf^0_{\rm y}$ & $\chi^2$ \\
  \hline
     BS  &   1.668 &   0.229 &      -- &   0.029 &   0.009 &      -- &      -- &   0.37706 \\
    BSC  &   0.874 &   0.171 &      -- &   0.036 &   0.014 &      -- &  0.0225 &   0.30895 \\
     MR  &   1.530 &   0.332 &  --3.130 &   0.030 &   0.021 &  --0.198 &      -- &   0.18964 \\
    MRC  &   1.528 &   0.331 &  --3.124 &   0.030 &   0.021 &  --0.198 &  0.0001 &   0.18964 \\
  \hline
 \end{tabular}
\end{table}