\begin{table}%t4
\caption{\label{tab:mg_li_linedata}Mg~I and Li~I line data.}
%\centerline
 {
\begin{tabular}{cccccc}
\hline\hline
$\lambda$&$\chi_{\rm low}$&$\log gf$&$\log C_6$&$\gamma_{\rm rad}$&$\log C_4$\\
$[\AA]$&[eV]&&&$10^8$~[1/s]&\\
\hline
 \multicolumn{6}{c}{Mg~I}\\
 4571.097&  0.00& --5.59& --31.50& --         &--15.00\\
 4730.031&  4.33& --2.34& --28.80& 4.768     &--15.00\\
 5167.336&  2.70& --0.87& --30.88& 1.002     &--14.52\\
 5172.697&  2.70& --0.39& --30.88& 1.002     &--14.52\\
 5183.616&  2.70& --0.17& --30.88& 1.002     &--14.52\\
 5528.415&  4.33& --0.50& --30.43& 4.908     &--13.12\\
 5711.093&  4.33& --1.70& --30.00& 4.817     &--15.00\\
 5785.280&  5.11& --1.76& --30.20& --         &--15.00\\
 \hline
 \multicolumn{6}{c}{Li~I}\\
 6707.760&  0.00&  0.00& --31.86& --         &--15.00\\
 6707.910&  0.00& --0.31& --31.86& --         &--15.00\\
\hline
\end{tabular}}
\medskip
\par
Following values are listed: {(1)} central wavelength, {(2)} lower excitation potential, {(3)} oscillator strength, {(4)} van der Waals damping constant, {(5)} radiative damping constant, {(6)} quadratic Stark effect damping constant. The radiation damping constant ($\gamma_{\rm rad}$) is calculated with the classical formula within {\em LINFOR} in case it is missing in the table.
\end{table}