\begin{table}%t1
\caption{\label{table:1}Summary of the photometric observations obtained with the Isaac Newton Telescope.}              
%\centerline
{\begin{tabular}{c c c c c}          
\hline\hline                        
Filter & 13 April 2007 & 14 April 2007  & 15 April 2007  & Total \\  
 & [min] & [min] & [min] & [min] \\  
\hline                                   
$y$ & $1 \times 30$ & $1 \times 30$ & $1 \times 30$ & 90 \\     
    $b$ & $1 \times 30$ & $1 \times 30$ & $1 \times 30$ & 90 \\
    $v$ & $1 \times 30$ & $1 \times 30$ & $1 \times 30$ & 90 \\
    $u$ & $1 \times 30$ & $2 \times 30$ & $2 \times 30$ & 150 \\
\hline                                        
\end{tabular}}\medskip
\par
Column 1 lists the filter. Columns~2--4 list the number of 30~min exposures obtained for each filter during each of the three useful nights. Column~5 lists the total exposure time for each filter.
\end{table}