\begin{table}%t1
%\centering
\small
\caption{Main characterictics of the detectors.}\label{tab:det}
\begin{tabular}{ll}
\hline\hline
Detector & CFH12K \\
\hline
Pixel size & 0.206~\mbox{arcsec} \\
Gain & 1.4--1.8 e$^{-}$/ADU (typically 1.5)\\
Quantum efficiency & 80\% at [600,700]nm \\
Readout noise & 3 to 10 e$^{-}$ (typically 5)\\
Dark current & 1 e$^{-}$ per min\\
\hline
\end{tabular}
\end{table}