\begin{table}%t2
%\centering
\par
\caption{Absorption lines in the UVES spectrum of GRB~060218.
\label{t1_sa}}
\begin{tabular}{clcccccc}
\hline\hline
System & Line &  $\lambda_{\rm o}$ & $z$ & $W_{\rm o}$ & $\log N$ & $b$ & $\log$ (\ion{Na}{i}/\ion{Ca}{ii}) \\
& & (\AA) & & (\AA) & [cm$^{-2}$] & (km s$^{-1}$) & \\
\hline
1 & \ion{Na}{i} $\lambda$5891 & 6088.23 & 0.033378 & 0.091 $\pm$ 0.008 &
$11.79\pm0.04$ & $6.3\pm1.0$ & $-0.54\pm0.08$ \\
 & \ion{Na}{i} $\lambda$5897 & 6094.41 & & 0.049 $\pm$ 0.007 & & & \\
 & \ion{Ca}{ii}    $\lambda$3934 & 4066.05 & 0.033363 & 0.093 $\pm$ 0.029 &
$12.33\pm0.07$ & $13.3\pm3.2$ & \\
 & \ion{Ca}{ii}    $\lambda$3969 & 4102.03 & & 0.064 $\pm$ 0.028 & && \\
\hline
2 & \ion{Na}{i} $\lambda$5891 & 6088.73 & 0.033462 & 0.071 $\pm$ 0.006 &
$12.22\pm0.22$ & $1.1\pm0.2$ & $0.01\pm0.23$ \\
 & \ion{Na}{i} $\lambda$5897 & 6094.90 & & 0.064 $\pm$ 0.006 & & \\
 & \ion{Ca}{ii}    $\lambda$3934 & 4066.42 & 0.033458 & 0.075 $\pm$ 0.025 &
$12.21\pm0.08$ & $4.6\pm1.8$ \\
 & \ion{Ca}{ii}    $\lambda$3969 & 4102.40 & & 0.054 $\pm$ 0.029 & & \\
\hline
Galaxy & \ion{Na}{i}  $\lambda$5891 & 5891.75 & 0.0000285 & 0.33 & $12.68\pm0.02$
& $6.4\pm0.2$ & $0.27\pm 0.06$ \\
   & \ion{Na}{i}  $\lambda$5897 & 5897.73 &           & 0.25 & & & \\
   & \ion{Ca}{ii}  $\lambda$3934 & 3934.93 & 0.0000381 & 0.13 & $12.41\pm0.06$
& (5) & \\
   & \ion{Ca}{ii}  $\lambda$3969 & 3969.74 &           & 0.08 & & & \\
\hline
\end{tabular}
\end{table}