\begin{table}%t5
\caption{CO-ice band optical depth and column density derived from the phenomenological decomposition.
\label{vela:co_components_tau}}
%\centerline
{\begin{tabular}[!ht]{lllllllll}
\noalign{\smallskip}
\hline
\hline
\noalign{\smallskip}
\multicolumn{1}{c}{Source}&\multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm total}}$}& \multicolumn{1}{c}{$\tau^{{\rm bc}}_{{\rm CO}}$}&\multicolumn{1}{c}{$\tau^{{\rm mc}}_{{\rm CO}}$}&\multicolumn{1}{c}{$\tau^{{\rm rc}}_{{\rm CO}}$} & \multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm bc}}$} & \multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm mc}}$} &\multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm rc}}$}& \multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm mc}}$/}\\
                          &\multicolumn{1}{c}{(10$^{17}$ cm$^{-2}$)}&         &   &  & \multicolumn{1}{c}{(10$^{17}$ cm$^{-2}$)}&\multicolumn{1}{c}{(10$^{17}$ cm$^{-2}$)}  & \multicolumn{1}{c}{(10$^{17}$ cm$^{-2}$)} & \multicolumn{1}{c}{$N_{{\rm CO}}^{{\rm rc}}$}\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\object{LLN 8}  & $<$1.8                            &          $<$0.10           &    ...                       &         ...                  &      ...                  &      ...            &  ...           & ...\\
\object{LLN 13}   & \phantom{$<$}$12.15\pm1.71$  & \phantom{$<$}$0.37\pm0.12$ & \phantom{$<$}$1.90\pm0.12$ & \phantom{$<$}$0.36\pm0.12$ & \phantom{$<$}$1.10\pm0.39$ & \phantom{$<$}$6.53\pm0.15$  & \phantom{$<$}$4.52\pm1.62$& 1.44\\
\object{LLN 17}   & \phantom{$<$1}$5.37\pm2.22$  & \phantom{$<$}$0.25\pm0.15$ & \phantom{$<$}$0.18\pm0.15$ & \phantom{$<$}$0.32\pm0.15$ & \phantom{$<$}$0.72\pm0.48$ & \phantom{$<$}$0.61\pm0.19$  & \phantom{$<$}$4.04\pm2.10$& 0.15\\
\object{LLN 17b}  & \phantom{$<$1}$3.83\pm1.74$  &          $<$0.51           & \phantom{$<$}$1.13\pm0.51$ &          $<$0.51            &        $<$1.5           & \phantom{$<$}$3.83\pm0.58$  &         $<$6.39           & $>$0.6 \\
\object{LLN 19}$^b$   & $<$1.8                            &          $<$0.10           &    ...                       &         ...                  &      ...                  &      ...            &  ...           & ...\\
\object{LLN 19}$^c$   & \phantom{$<$1}$0.43\pm0.05$     & \phantom{$<$}$0.02\pm0.005$          & \phantom{$<$}$0.03\pm0.005$         &  \phantom{$<$}$0.025\pm0.005$          &  \phantom{$<$}$0.07\pm0.02$            &  \phantom{$<$}$0.10\pm0.02$          & \phantom{$<$}$0.25\pm0.05$        & 0.41\\
\object{LLN 41}   & \phantom{$<$1}$4.09\pm2.16$  &          $<$0.15           & \phantom{$<$}$0.48\pm0.15$ & \phantom{$<$}$0.18\pm0.15$ & \phantom{$<$}$0.14\pm0.15$ & \phantom{$<$}$1.64\pm0.18$  & \phantom{$<$}$2.27\pm2.04$& 0.72\\
\object{LLN 41b}  & $<$1.8                            &          $<$0.10           &    ...                       &         ...                  &      ...                  &      ...             &  ...           & ...\\
\object{LLN 20}$^d$ & \phantom{$<$1}$5.19\pm0.96$  & \phantom{$<$}$0.12\pm0.07$ & \phantom{$<$}$0.38\pm0.08$ & \phantom{$<$}$0.29\pm0.04$ &  \phantom{$<$}$0.35\pm0.20$     &  \phantom{$<$}$1.29\pm0.27$   & \phantom{$<$}$3.55\pm0.49$& 0.36\\
\object{LLN 33}$^d$ & \phantom{$<$1}$7.85\pm0.81$                 & \phantom{$<$}$0.21\pm0.05$ & \phantom{$<$}$0.94\pm0.09$ & \phantom{$<$}$0.33\pm0.03$ &  \phantom{$<$}$0.61\pm0.14$     &  \phantom{$<$}3.20$\pm$0.31  & \phantom{$<$}$4.04\pm0.37$& 0.79\\
\object{LLN 39}$^d$ & \phantom{$<$1}$0.44\pm0.16$                 & \phantom{$<$}$0.004\pm0.003$& \phantom{$<$}$0.02\pm0.01$ & \phantom{$<$}$0.03\pm0.01$ &  \phantom{$<$}$0.011\pm0.008$   &  \phantom{$<$}$0.068\pm0.034$ & \phantom{$<$}$0.37\pm0.12$& 0.18\\
\object{LLN 47}$^d$ &           $<$0.36                &          $<$0.06           &         $<$0.02              &         $<$0.01           &    $<$0.17                        & $<$0.07                 & $<$0.12&  ... \\
\hline
\end{tabular}}
\par
\smallskip
$^a$ The error bars are 3$\sigma$ level. 
$^b$ Low resolution spectrum. 
$^c$ Medium resolution spectrum. 
$^d$ Data from \cite{Pontoppidan2003AetA...408..981P}. 
\end{table}