\begin{table}%t1
%\centering
\par
\caption {Log of the observations. $R$ gives the average spectral
  resolution as measured from the data. The resolution varies by~10\%
  from one spectrum to the next. The seeing is the one recorded by the
  observatory DIMM monitor, and not the effective spatial resolution
  obtained from the data cube.
\label{tab:obslog}}
\begin{tabular}{lclccc}
\hline
\hline
Date & Integration & Setting & $\lambda$ & $R$ & Seeing \\
     & time (s)    &         & ($\AA$)   & ($\lambda/\Delta\lambda$)    &  ($\arcsec$)\\
\hline
2006 April 25 & 3~$\times$~600 & LR blue   & 3600--6800 & 250  & 0.9\\
2006 May   24 & 2~$\times$~600 & LR blue   & 3600--6800 & 250  & 0.9\\
2006 April 29 & 3~$\times$~1800& HR orange & 5045--7475 & 2700 & 0.7\\
2006 May 3  & 2~$\times$~1800 & HR orange  & 5045--7475 & 2700 & 0.8\\
2006 May 24 & 2~$\times$~1800 & HR blue    & 3970--6230 & 2600 & 1.0\\
2006 May 25 & 1~$\times$~1800 & HR blue    & 3970--6230 & 2600 & 0.4\\
\hline
\end{tabular}
\end{table}