\begin{table}%t4
%\centering
\par
\caption {\label{tab:nonLTE}Non-LTE model atoms, ions and molecules.}
\begin{tabular}{ccccc}
\hline\hline
Species & \hspace*{-1mm}\#levels\hspace*{-1mm} 
        & \hspace*{-3mm}\#lines\hspace*{-2mm} 
        & Coll.~partners & Reference\\
\hline
O~I               &   3 &   3 & p-H$_2$, o-H$_2$, H, H$^+$, e$^-$    
                   & \hspace*{-1mm}$\Lambda$-database\hspace*{-1mm}\\
C~I               &   2 &   1 & 
      \hspace*{-1mm}p-H$_2$, o-H$_2$, H, H$^+$, He, e$^-$\hspace*{-2mm} 
                   & \hspace*{-1mm}$\Lambda$-database\hspace*{-1mm}\\
C~II              &   3 &   3 & H$_2$, H, e$^-$        
                   & \hspace*{-1mm}$\Lambda$-database\hspace*{-1mm}\\
Mg~II             &   8 &  12 & e$^-$                & C{\sc hianti}\\
Fe~II             &  80 & 477 & e$^-$                & C{\sc hianti}\\
Si~II             &  15 &  35 & e$^-$                & C{\sc hianti}\\
S~II              &   5 &   9 & e$^-$                & C{\sc hianti}\\
\hspace*{-2mm}CO rot. \& ro-vib.\hspace*{-1mm} 
                   & 110 & 243 & p-H$_2$, o-H$_2$, H, He, e$^-$ & see text\\
\hspace*{-2mm}o-H$_2$ ro-vib.\hspace*{-1mm}    
                   &  80 & 803 & p-H$_2$, o-H$_2$, H, He       & see text\\
\hspace*{-2mm}p-H$_2$ ro-vib.\hspace*{-1mm}    
                   &  80 & 736 & p-H$_2$, o-H$_2$, H, He       & see text\\
o-H$_2$O rot.      &  45 & 158 & H$_2$                
                   & \hspace*{-1mm}$\Lambda$-database\hspace*{-1mm}\\
p-H$_2$O rot.      &  45 & 157 & H$_2$                
                   & \hspace*{-1mm}$\Lambda$-database\hspace*{-1mm}\\
\hline
\end{tabular}
\end{table}