\begin{table}%Ta1
\caption{\label{table-collision-rates}CN$^-$--H$_2$ collision rate coefficients ($10^{-10}$
cm$^3$ s$^{-1}$).}  
\small%\centering
\par
\begin{tabular}{cccccccc}
\hline \hline\noalign{\smallskip}
           & \multicolumn{7}{c}{Temperature (K)} \\
\cline{2-8}
Transition & 10   & 20   & 30   & 40   & 50   & 60   & 70 \\
\hline
1 $\to$ 0  & 3.33 & 3.06 & 2.88 & 2.72 & 2.59 & 2.48 & 2.39 \\
2 $\to$ 0  & 0.81 & 0.65 & 0.59 & 0.55 & 0.54 & 0.53 & 0.53 \\
2 $\to$ 1  & 4.81 & 4.50 & 4.25 & 4.05 & 3.88 & 3.74 & 3.62 \\
3 $\to$ 0  & 0.67 & 0.64 & 0.61 & 0.59 & 0.57 & 0.56 & 0.52 \\
3 $\to$ 1  & 1.32 & 1.18 & 1.07 & 1.00 & 0.96 & 0.93 & 0.92 \\
3 $\to$ 2  & 4.81 & 4.62 & 4.39 & 4.19 & 4.03 & 3.88 & 3.77 \\
\hline
\end{tabular}
\tablefoot{The complete set of de-excitation rate coefficients of
CN$^-$ by collisions with para-H$_2$ considered in this study is
available at the {\footnotesize BASECOL} website
\protect\url{http://basecol.obspm.fr/}} 
\end{table}