\begin{table}%t1
  \caption{Details of the quantum M\textsc{olscat} cross section
    calculation parameters. $J_{1\rm up}({\rm HC_3N}) \leq 15$ (10 for~He). Methods: CC, Close coupling, CS, Coupled states approx., IOS, Infinite Order Sudden approx.}
  \label{tab:param} 
  %\centering
\small
  \begin{tabular}{ccc}
    \hline\hline 
    \multicolumn{3}{c}{$ \sigma_{J_1J'_1}(E)$, \cc--para-\hh\ collisions}\\ 
        $E_{\rm tot}\:\rm (cm^{-1})$ & Energy step ($\rm cm^{-1}$) & Method
    \\
    \hline
    $0.3 \rightarrow 60$ & $0.1$ & CC \\
    $60 \rightarrow 110$ & $10$ & CC \\
    $40 \rightarrow 200$ & $10$ & CS \\
    $50 \rightarrow 800$ & $10{-}100 $ & IOS\\
    \hline
    \multicolumn{3}{c}{$ \sigma_{J_1J'_1}(E)$, \cc--ortho-\hh\ collisions}\\
 $0\rightarrow 30 $& $1$ & CC \\
    \hline
    \multicolumn{3}{c}{$ \sigma_{J_1J'_1}(E)$, \cc--He collisions}\\
 $0\rightarrow 25 $& $0.1$ & CC \\
     $25\rightarrow 100 $& $5$ & CC \\
     $100\rightarrow 150 $& $10$ & CC \\
    \hline
  \end{tabular}
\end{table}