\begin{table}%t2
\caption{\label{obslogopt}Log of optical observations.}
\small%\centering
\par
\begin{tabular}{llllr}
\hline \hline\noalign{\smallskip}
No. & Observatory & ID  & Obs. time & Exp. time\\
\hline
H1 & ESO/HARPS & 6201 & 2008-05-09 02:19 & 20 min\\
H2 & ESO/HARPS & 6381 & 2008-05-09 08:55 & 20 min\\
H3 & ESO/HAPRS & 6711 & 2008-05-10 02:18 & 20 min\\
H4 & ESO/HARPS & 6971 & 2008-05-10 08:10 & 20 min\\
A1 & ANU & 35 & 2009-05-05 12:38 & 30 min \\
A2 & ANU & 36 & 2009-05-05 13:09 & 30 min \\
A3 & ANU & 36 & 2009-05-06 11:50 & 30 min \\
A4 & ANU & 37 & 2009-05-06 12:20 & 30 min \\
\hline
\end{tabular} 
\end{table}