\begin{table}%t2 %%\centering \par \caption{\label{filt.tbl}Definitions of the \mbox{narrow-} and \mbox{broad-band} filters.} \begin{tabular}{l l l l l} \hline \hline \noalign{\smallskip} Filter & Features & $\lambda_{\rm{c}}$ & $\Delta \lambda$ & Class\\ & & [$\mu$m] & [$\mu$m]\\ \hline 1.01 & C$_2$, CN & 1.01 & 0.02 & I \\ 1.09 & CN & 1.09 & 0.02 & I\\ 1.11 & ``cont'' & 1.11 & 0.02 & I\\ 1.51 & CN+ & 1.51 & 0.02 & I\\ \textbf{1.53} & C$_2$H$_2$, HCN, CN & 1.53 &0.02 & \textbf{I}\\ 1.575 & CN & 1.575 & 0.05 & I\\ 1.625 & CN, CO & 1.625 & 0.05 & I\\ 1.675 & ``cont'' & 1.675 & 0.05 & I\\ 1.775 & C$_2$ & 1.775 & 0.05 & I\\ 2.175 & CN & 2.175 & 0.05 & I\\ 2.375 & CO & 2.375 & 0.05 & I\\ \textbf{3.175} &C$_2$H$_2$, HCN, CN & 3.175 & 0.05 & \textbf{III} \\ 3.525 & ``cont'' & 3.525 & 0.05 & II\\ 3.775 & C$_2$H$_2$ & 3.775 & 0.05 & II\\ 3.825 & C$_2$H$_2$ & 3.825 & 0.05 & II\\ 3.975 & ``cont'' & 3.975 & 0.05 & II\\ \textbf{9.975} & ``cont'' & 9.975 & 0.05 & \textbf{II}\\ 11.025 & ``cont'' & 11.025 & 0.05 & II\\ 12.025 & C$_2$H$_2$ & 12.025 & 0.05 & III\\ 12.475 & C$_2$H$_2$ & 12.475 & 0.05 & III\\ 12.775 & C$_2$H$_2$ & 12.775 & 0.05 & III\\ \hline $J$ & & 1.26 & 0.44&\\ $H$ & & 1.65 & 0.38&\\ $K$ & & 2.21 & 0.54&\\ $L^\prime$ & & 3.81 & 0.74&\\ \hline \end{tabular} \end{table}