\begin{table}%T4
\caption{\label{tab:filters}HAWK-I filter summary.}
\small
%\centering
\par
\begin{tabular}{ccccccl}
\hline\hline
Filter name & Central & Cut-on & Cut-off  & Width & Tansmission & Comments\\
 & wavelength [nm] & (50\%) [nm] & (50\%) [nm] & [nm] & [\%] & \\
\hline\noalign{\smallskip}
$Y$ & 1021 & 970 & 1071 & 101 & 92\% &   out-of-band transmission of $2\times 10^{-4}$ \\ 
& & & & & &   (or 0.04\%) between 2.3 and 2.7~$\mu$m \\
$J$ & 1258 & 1181 & 1335 & 154 & 88\% & \\
$H$ & 1620 & 1476 & 1765 & 289 & 95\% & \\
$K_{\rm s}$ & 2146 & 1984 & 2308 & 324 & 82\% & \\
\hline
CH$_4$ & 1575 & 1519 & 1631 & 112 & 90\% & \\
Br$\gamma$ & 2165 & 2150 & 2181 & 30 & 77\%&  \\
H$_2$ & 2124 & 2109 & 2139 & 30 & 80\% & \\
\hline
NB1060 & 1061 & 1057 & 1066 & 9 & 70\% &  Ly$\alpha$ at $z\sim7.7$ \\
NB1190 & 1186 & 1180 & 1192 & 12 & 75\% & Ly$\alpha$ at $z\sim8.7$ \\
NB2090 & 2095 & 2085 & 2105 & 20 & 81\% & H$\alpha$ at $z\sim2.2$ \\
\hline
\end{tabular}
\end{table}