\begin{table}%t1
\caption{\label{tab1}Adopted molecular parameters.}
\small%\centerline
 {
\begin{tabular}{lrclclc}
\hline\hline
Species &   Vibronic band               &   Rotational lines        &   Position   &Ref.   &   $f$-value &Ref.    \\
& & &[\AA] \\
\hline
OH  &   A$^{2}\Sigma^{+}$--X$^{2}\Pi_{i}$ (0, 0)  	&   Q$_{1}$(3/2)+$^{Q}P_{21}$(3/2)&   3078.443    &1  &   0.00105 &2  \\
    &                   		(0, 0)  	&   P$_{1}$(3/2)            	  &   3081.6645   &1  &   0.000648 &2  \\
CH  &   B$^{2}\Sigma^{-}$--X$^{2}\Pi$ (0, 0)  	&   Q$_{2}$(1)+$^{Q}$R$_{12}$(1)  &   3886.409    &3  &   0.00320 &3  \\
    &                  			 (0, 0)  	&   $^{P}$Q$_{12}$(1)          	  &   3890.217    &3  &   0.00210 &3  \\
CH$^{+}$&   A$^{1}\Pi$--X$^{1}\Sigma^{+}$ (0, 0)   	& R(0)               		  &   4232.548    &3  &   0.00545 &3  \\
    &   				(1, 0)          &   R(0)                	  &   3957.689    &4  &   0.00342 &4  \\
    &  					 (2, 0)         &   R(0)               		  &   3745.308    &4  &   0.00172 &4  \\
CN  &   B$^{2}\Sigma^{+}$--X$^{2}\Sigma^{+}$ (1, 0)	&  R(0)               		  &   3579.963    &5  &   0.00300 &5  \\
    &                   			(1, 0)  &   R(1)             	          &   3579.453    &5  &   0.00200 &5  \\
    &   B$^{2}\Sigma^{+}$ -- X$^{2}\Sigma^{+}$ (0, 0)	&  R(0)                		  &   3874.608    &5  &   0.03420 &5  \\
    &                  				 (0, 0) &   R(1)            		  &   3873.998    &5  &   0.02280 &5  \\
    &   A$^{2}\Pi$--X$^{2}\Sigma^{+}$ 	(1, 0)	&  R$_{1}$(0)                	  &   9186.935    &6  &   0.000792 &6  \\
    &                  				 (1, 0) &   R$_{1}$(1)         		  &   9183.216    &6  &   0.000501 &6  \\
\hline
\end{tabular}}
\medskip
References: 1~--~this work; 2~--~Felenbok \& Roueff (\cite{Fele96}); 
3~--~Gredel et~al. (\cite{Gred93}); 4~--~Weselak et~al. (\cite{Wese09a}); 5~--~Meyer et~al. (\cite{Meye89}); 6~$-$~\mbox{van Dishoeck} \& Black (\cite{vand89}).
\end{table}