\begin{table}%t3
  \caption{\label{Tab:DIlines}Absorption lines used for Doppler imaging.}
%\centerline
{\small
    \begin{tabular}{l c c}
      \hline \hline
      Name \hspace*{1cm} & Rest wavelength$^a$ (\AA) & Chemical element \\
      \hline
      6122  & 6122.22 & Ca I \\
      6439  & 6439.08 & Ca I \\
      \hline
    \end{tabular}}
\par
  \medskip
  $^a$~From VALD (Vienna Atomic Line Database).
\end{table}