\begin{table}%t3
 %%\centering

\par
 \caption{\label{tab:vdw}The adjusted Van der Waals constants compared to the values from VALD.}
\begin{tabular}{lccc}
\hline\hline
     &                 & \multicolumn{2}{c}{$\log \gamma$ [rad~${\rm cm}^3$/s]} \\ 
Line & $\lambda$ [\AA] & Adjusted & VALD \\ \hline
\mgoneb & 5167.321 & $-7.42$ & $-7.267$ \\
        & 5172.684 & $-7.42$ & $-7.267$ \\
        & 5183.604 & $-7.42$ & $-7.267$ \\ \hline
\naoned & 5889.951 & $-7.85$ & $-7.526$ \\
        & 5895.924 & $-7.85$ & $-7.527$ \\ \hline
\caone  & 6122.217 & $-7.27$ & $-7.189$ \\
        & 6162.173 & $-7.27$ & $-7.189$ \\ \hline
\caone  & 6439.075 & $-7.84$ & $-7.569$ \\ 
\hline
\end{tabular}
\end{table}