\begin{table}%t1 \caption{\label{tab1}Observations log of $\delta$~Cen and its calibrators during the January~2008 Be~AMBER GTO run.} \small %\centering \par \begin{tabular}{ccccc} \hline \hline Obs. time &Target & Triplet & Mode & Seeing\\ \hline 06/01/08 08:59 & $\delta$~Cen & A0-K0-G1 & MR & 1.02$''$\\ 06/01/08 09:11 & HD 109538 & A0-K0-G1 & MR & 1.13$''$\\ 06/01/08 09:26 & $\delta$~Cen & A0-K0-G1 & MR & 1.19$''$\\ \hline\noalign{\smallskip} 08/01/08 08:48 & HD 90798 & E0-G0-H0 & LR & 0.50$''$\\ 08/01/08 09:11 & $\delta$~Cen & E0-G0-H0 & LR & 0.94$''$\\ \hline\noalign{\smallskip} 09/01/08 08:07 & HD 47536 & E0-G0-H0 & MR & 0.68$''$\\ 09/01/08 08:31 & $\delta$~Cen & E0-G0-H0 & MR & 0.74$''$ \\ 09/01/08 08:50 & HD 109538 & E0-G0-H0 & MR & 0.87$''$\\ 09/01/08 09:08 & $\delta$~Cen & E0-G0-H0 & MR & 1.22$''$\\ 09/01/08 09:28 & HD 109538 & E0-G0-H0 & MR & 0.71$''$\\ \hline \end{tabular} \par \end{table}