\begin{table}%t6
\caption{Individual measurements of the mean longitudinal magnetic field for the strongly magnetic star HD~94660.}\label{tab:results2}
%\centering
\small
\begin{tabular}{c|c|c}
\hline
\hline
MJD & $\left< B_z \right>$ $\pm$ $\sigma_B$ & $\left< B_z \right>$ $\pm$ $\sigma_B$  \\
& [G]  & [G]  \\
& set 1 & set 2 \\
\hline
54~181.03960 & $-$1534   $\pm$   30 & $-$1919   $\pm$   56 \\
54~181.04154 & $-$1624   $\pm$   32 & $-$1861   $\pm$   60 \\
54~181.04348 & $-$1688   $\pm$   34 & $-$1889   $\pm$   62 \\
54~181.04542 & $-$1596   $\pm$   33 & $-$1908   $\pm$   62 \\
\hline
\end{tabular}
\end{table}