\begin{table}%t3
\caption{\label{tab:detectors}HAWK-I detector characteristics.}
\small
%\centerline
{
\begin{tabular}{lllll}
\hline \hline
Detector parameter  & $Q$1 & $Q$2 & $Q$3 & $Q$4\\
\hline
Detector numbering & \#66 & \#78 & \#79 & \#88 \\
Operating temperature   & \multicolumn{4}{c}{75~K, controlled to 1~mK}  \\
Gain   [e$^-$/ADU]          &  1.705  & 1.870 & 1.735 & 2.110 \\
Dark current (at 75 K)  &  \multicolumn{4}{c}{$<$$0.01$ e$^-$/s/pix} \\
Read-out noise (NDR)$^a$       & \multicolumn{4}{c}{$\sim$$5$ to $12 $ e$^-$} \\
Linear range (1\%)            &   \multicolumn{4}{c}{60~000 e$^-$ ($\sim$30~000 ADUs)} \\
Saturation level              &  \multicolumn{4}{c}{between 40~000 and 50~000 ADUs}  \\
Hot/dead~pixels              &  \multicolumn{4}{c}{$<$10~000/chip, i.e.~0.015\%}  \\
%merde
\hline
\end{tabular}}
\smallskip
$^a$  The read-ou noise (RON) in the default Non-Destructive Read (NDR) mode depends on the DIT: the detector is read continuously every~$\sim$1.3~s, i.e.~the longer the DIT, the more reads are possible and the lower the RON. For the minimum DIT (1.3~s), the RON is $\sim$12~e$^-$; for DIT~=~10~s, the RON is $\sim$8~e$^-$ and for DIT~$>$~15~s, the RON remains stable at $\sim$5~e$^-$. 
\end{table}