\begin{table}%t1
\caption{\label{tab:log}Summary of the observations.}
\small%\centerline
 {
\begin{tabular}{lllrrll}         
\hline\hline                  
Date & Grating & Wavelength & {\it FWHM}$^*$& Sampling & Object & Exposure\\
     &         & range (\AA)& (\AA) & (\AA/pix) &        & Time (s)     \\     
\hline 
31/05/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 40.36 & 5 $\times$ 1800 \\
01/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 40.36 & 5 $\times$ 1800 \\
02/06/05 & V300 & 3700--7100 &  7.8 & 3.2 & 4C 40.36 & 4 $\times$ 1800 \\
03/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 40.36 & 3 $\times$ 1800 \\
04/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 40.36 & 3 $\times$ 1800 \\
\hline
01/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 48.48 & 6 $\times$ 1800 \\
02/06/05 & V300 & 3700--7100 &  7.8 & 3.2 & 4C 48.48 & 5 $\times$ 1800 \\
03/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 48.48 & 5 $\times$ 1800 \\
04/06/05 & V600 & 3700--5350 &  3.9 & 1.5 & 4C 48.48 & 3 $\times$ 1800 \\
\hline                                   
\end{tabular}}
\medskip
(*) Errors are too low to be quoted. 
\end{table}