\begin{table}%t1
 \caption{\label{tab1} Wavelengths, oscillator strengths, and broadening data for the two considered lines.}
%\centerline
{\small
\begin{tabular}{llllll}
 \hline\hline\noalign{\smallskip}
\multicolumn{6}{c}{$\rm 2s^2S$--$2{\rm p}^2{\rm P}^{\rm o}$}\\
\multicolumn{6}{c}{$^{(a)}\Gamma~=~3.690\times10^{7}$ \ \ \ $^{(b)}\sigma=346$ \ \ \  $^{(c)}\alpha=0.236$}\\\hline
%\noalign{\smallskip}
  $\lambda$[nm]    &   $J_{\rm l}$  & $J_{\rm u}$&   $f$ & $F_{\rm l}$  & $F_{\rm u}$  \\
\hline%\noalign{\smallskip}
 670.79080     & 1/2            &1/2              & $1.037\times 10^{-2}$  &1             & 1     \\
 670.79066     & 1/2            &1/2              & $5.186\times 10^{-2}$  &1             & 2     \\
 670.79200     & 1/2            &1/2              & $3.112\times 10^{-2}$  &2             & 1     \\
 670.79187     & 1/2            &1/2              & $3.112\times 10^{-2}$  &2             & 2     \\
 670.77561     & 1/2            &3/2              & $1.245\times 10^{-1}$  &1             & 0,~1,~2 \\
 670.77682     & 1/2            &3/2              & $1.245\times 10^{-1}$  &2             & 1,~2,~3 \\ \hline 
             \noalign{\smallskip}
\multicolumn{6}{c}{$\rm 2p^2P^{o}$--$3{\rm d}^2D$}\\
\multicolumn{6}{c}{$^{(a)}\Gamma=1.055\times10^{8}$ \ \ \ $^{(b)}\sigma=837$ \ \ \ $^{(c)}\alpha=0.274$}\\
\hline\noalign{\smallskip}
  $\lambda$[nm]    &   $J_{\rm l}$  & $J_{\rm u}$&    $f$ && \\
\hline\noalign{\smallskip}
610.3538     & 1/2             &3/2              & $6.386\times 10^{-1}$  &    &   \\ 
610.3664     & 3/2             &3/2              & $6.386\times 10^{-2}$  &    &   \\
610.3649     & 3/2             &5/2              & $5.747\times 10^{-1}$  &    &   \\
\hline
\end{tabular}}
\smallskip
\par
$^{(a)}$  $\Gamma$ $\rm[rad~s^{-1}]$ is the natural broadening parameter.\\
$^{(b)}$  $\sigma$ [a.u.~] is the broadening cross-section for collisions with neutral hydrogen at relative velocity $v=10^4~\rm m~s^{-1}$ \citep{Anstee95}.
\\
$^{(c)}$  $\alpha$ is the velocity dependence of $\sigma$.
\end{table}