\begin{table}%t3
\caption{\label{table:abundances}Observed fluorescent intensities at 6$''$\tablefootmark{a}.}     
 %\centerline
{\small                       
\begin{tabular}{l c c l}       
\hline\hline \noalign{\smallskip}              
 & Transition at 5585 \AA & Transition at 5635 \AA & Unit \\
\hline\noalign{\smallskip}
Intensity						&	2.8 ($-7$) $\pm$\ 0.6 ($-7$)	& 5.7 ($-7$) $\pm$\ 0.6 ($-7$)&[erg cm$^{-2}$ s$^{-1}$ sr$^{-1}$]\\
Column density of fluorescing molecules in the (excited) d$^3\Pi_g$ state	& 4.0 ($-1$) $\pm$\ 0.8 ($-1$)	& 1.0 $\pm$\ 0.1 & [cm$^{-2}$]\\
$N$(C$_2$) 						&		1.1 (11) $\pm$\ 0.2 (11)	& 6.3 (10) $\pm$\ 0.6 (10) & [cm$^{-2}$] \\
C$_2$ abundance 				&	 	5.7 ($-11$) $\pm$\ 1.1 ($-11$)	& 3.9 ($-11$) $\pm$\ 0.4 ($-11$) &\\
\hline
\end{tabular}}
\tablefoot{\tablefoottext{a}{Values in brackets give exponents to base 10.}}
\end{table}