\begin{table}%t1
\caption{Observing log for the M~4 campaign in 2001.} 
\label{table:1}       
%\centering
\small                 
\begin{tabular}{lrrrll}     
\hline\hline                
             & \multicolumn{3}{c}{Number of images}                                        & \multicolumn{2}{c}{Date of observation} \\
Observatory  & \multicolumn{1}{c}{$B$} & \multicolumn{1}{c}{$V$} & \multicolumn{1}{c}{$R$} & \multicolumn{1}{c}{Start} & \multicolumn{1}{c}{End} \\    
\hline                         
SSO          &   0 &  548 &  735  & May 1    & June 10 \\ 
CTIO         & 143 &  274 &  446  & June 1   & June 6  \\
La~Silla     & 847 & 1358 & 1809  & April 13 & June 30 \\       
\hline                                    
\end{tabular}
\end{table}