\begin{table}%t2
\caption{\label{tab:coeff}Mean photometric calibration coefficients for our WFI observing run.}
\small
%\centerline
 {\begin{tabular}{cccc}  
\hline\hline
Filter & {\it AE}$^\dagger$ & {\it ZP} & {\it c} \\
\hline
$V$		&  0.130 & $24.195\pm0.03$5 & $0.071\pm0.037$  \\
$R$		&  0.096 & $24.509\pm0.027$ & $0.078\pm0.031$  \\
$I$		&  0.082 & $23.502\pm0.034$ & $0.325\pm0.044$  \\
\hline
\end{tabular}}
\par
\smallskip
$^\dagger$  {AE = Atmospheric extinction coefficient. The mean values for La Silla have been adopted.}
\end{table}