\begin{table}%t2
\caption{HAWK-I field-of-view vignetting.}
\label{tab:vignet}
\small%\centerline
{
\begin{tabular}{lcc}
\hline \hline
Edge & No of columns   & Maximum \\
& or rows vignetted $>$10\%  & vignetting$^a$ \\
\hline
$+$Y & 1 & 14\% \\
$-$Y & 8 & 54\% \\
$-$X & 7 & 36\% \\
$+$X & 2 & 15\% \\
\hline
\end{tabular}}
\smallskip
$^a$  The last column represents the maximum extinction of a vignetted~pixel, i.e.~the percentage of light absorbed in the~pixel row or column, with respect to the mean of the field. 
\end{table}