\begin{table}%t1
  \caption{Log of the observations. \label{tab:log}}
%\centerline
 {  \begin{tabular}{lcccc}
    \hline\hline
    Date   & UT time & Cycles  &  Night & Quiesc. \\
    (2007) &         &         & quality$^{\ast}$ & state  \\
    \hline
    Jan. 18 & 17:27--19:17 & 141096, 141097 & b & low   \\ 
    Jan. 20 & 16:45--21:15 & 141123, 141124 & a & low   \\
    Jan. 21 & 17:38--20:53 & 141137, 141138 & b & high  \\
    Jan. 22 & 16:48--23:03 & 141150--141153  & c & high  \\
    Feb. 15 & 17:15--19:15 & 141476         & b & high  \\
    \hline
  \end{tabular}}
\par
  \smallskip
  $^{\ast}$ Quality: a -- photometric,         b -- good, c -- poor.
\end{table}