\begin{table}%t1
\par
\caption{\label{t1}Log of the     high-resolution spectra   that we discuss in this paper,  obtained with the   FIES spectrograph at the NOT. Dates are for start of night. HJD is     given in seconds with respect to 2453952.0.}
\par
%\centering
\par
\begin{tabular}{cccc}
\hline
\hline
Date 2006   & \multicolumn{2}{c}{Heliocentric JD} & Number of spectra\\
\hline
 3 Aug.  & --42~782 & --21~936 &  385  \\
 4 Aug.  &    43~871 &    64~754 &  457  \\
%23 Oct ~ ~ &  6951985 &  6964208 &  255 ~ ~ ~ ~ ~ \\ 
% 9 Nov ~ ~ &  8419579 &  8427441 &  170 ~ ~ ~ ~ ~ \\
%25 Dec ~ ~ & 12382172 & 12386202 &   84 ~ ~ ~ ~ ~ \\
%26 Dec ~ ~ & 12467516 & 12482871 &  255 ~ ~ ~ ~ ~ \\
\hline
\end{tabular}
\end{table}