\begin{table}%T2
\par
\caption{\label{tab2}Column densities and abundances relative to H$_2$ (boldface) inferred at positions of interest in the Horsehead, IC~63 and \roph. 
 $^{(d)}$~10$^{12}$~cm$^{-2}$. 
{Units for column densities are in cm$^{-2}$ and indicated in superscript for each molecule}.
Units for abundances are indicated in the first column of each corresponding row. The offsets refer to the positions indicated Figs.~\ref{roph maps} and~\ref{ic63 points}.}
%\centering
\par
\begin{tabular}{l | c c c| c c c| c c} 
\hline \hline  
Molecule	& \multicolumn{3}{|c|}{Horsehead nebula}  & \multicolumn{3}{c|}{IC~63 cut} 			            & \multicolumn{2}{c}{\roph~cut} \\
		& CO peak &  IR peak & Hydroc. peak & (0\arcsec, 0\arcsec)& (10\arcsec, $-$10\arcsec)	& (20\arcsec, $-$20\arcsec) & ($\Delta \alpha=-21$\arcsec)& ($\Delta \alpha=-134$\arcsec) \\ \hline
H$_2$\aba            & $7.5\pm 2.5$            	& $7.2\pm 2.4$		& $10.5\pm 3.5$           	& $5.0  \pm  2.0$       & $  5.0\pm  2.0$       & $5.0\pm 2.0$          & $11.4\pm 2.4$           & $2.4\pm 0.3$  \\
\cdo\abb             & $5.0\pm 0.2$		& $3.5\pm 0.2$          & $4.0\pm 0.2$			& $0.18 \pm 0.02$       & $0.05\pm0.02$                & $0.05\pm0.02$                & $4.0\pm 0.2$          & $0.4\pm0.02$  \\
($10^{-7}$)	     & {\bf 6.7}~$\pm$~{\bf 2.2} 	& {\bf 4.9}~$\pm$~{\bf 1.6}& {\bf 3.8}~$\pm$~{\bf 1.3} 	& {\bf 0.36}~$\pm$~{\bf 0.15} & {\bf 0.10}~$\pm$~{\bf 0.06} & {\bf0.10}~$\pm$~{\bf 0.06} & {\bf 8.0}~$\pm$~{\bf 3.2} & {\bf 1.7}~$\pm$~{\bf 0.2}  \\
\cch\abc             & $17.0\pm 2.0$         	& $16.0\pm 2.0$         & $22.7\pm 3.3$         	& $5.3\pm0.4$           & $8.6\pm0.6$           & $6.9\pm0.5$           & $3.0\pm 0.3$          & $2.0\pm 0.2$  \\
($10^{-8}$)	     & {\bf 2.3}~$\pm$~{\bf 0.8} 	& {\bf 2.2}~$\pm$~{\bf 0.8}& {\bf 2.2}~$\pm$~{\bf 0.8} 	& {\bf 1.1}~$\pm$~{\bf 0.4} & {\bf 2.1}~$\pm$~{\bf 1.0} & {\bf 1.4}~$\pm$~{\bf 0.6} & {\bf 0.6}~$\pm$~{\bf 0.2} & {\bf 0.8}~$\pm$~{\bf 0.1}  \\
$c$-\ccch\abd        & $<$2.1               	& $3.9 \pm 0.5 $	& --                    	& $<$1.2               & --                    & --                    & --                    & --          \\
($10^{-10}$)	     & {\bf $<$2.8}         	& {\bf 5.4}~$\pm$~{\bf 1.9} & --                  	& {\bf $<$2.4}         & --                    & --                    & --                    & --                     \\
$l$-\ccch\abd        & $<$2.3               	& $2.1 \pm 0.7$         & --                    	& $<$5.8               & --                    & --                    & --                    & --          \\
($10^{-10}$)	     & {\bf $<$3.1} 	     	& {\bf 2.9}~$\pm$~{\bf 1.4}& --                  		& {\bf $<$11.6}        & --                    & --                    & --                    & --                     \\
$c$-\ccchh\abd       & $11.0\pm 3.0$         	& $9.3 \pm 0.2$         & $15.0 \pm 5.0$        	& $4.5\pm 1.0$          & $4.7\pm 1.0$          & $3.0\pm0.6$           & $3.0\pm0.6$           & $3.0\pm0.6$  \\
($10^{-9}$)	     & {\bf 1.5}~$\pm$~{\bf 0.6} 	& {\bf 1.3}~$\pm$~{\bf 4.3}& {\bf 1.4}~$\pm$~{\bf 0.7} 	& {\bf 0.9}~$\pm$~{\bf 0.4} & {\bf 0.9}~$\pm$~{\bf 0.4} & {\bf 0.6}~$\pm$~{\bf 0.3} & {\bf 0.6}~$\pm$~{\bf 0.3} & {\bf 1.3}~$\pm$~{\bf 0.3}  \\
$l$-\ccchh\abd       & $<$0.32     	     	& $<$0.33              & --                    	& --                    & --                    & --                    & --                    & --          \\
($10^{-11}$)	     & {\bf $<$4.3}         	& {\bf $<$4.6}         & --                    	& --                    & --                    & --                    & --                    & --                     \\
\chhhcch\abc         & $<$1.1                	& $<$1.1                & --                    	& --                    & --                    & --                    & --                    & --          \\
($10^{-9}$)	     & {\bf $<$1.4}         	& {\bf $<$1.4}         & --                    	& --                    & --                    & --                    & --                    & --                     \\
\cccch\abd           & $10.0\pm 3.0$         	& $11.0\pm 3.0$         & $31.0\pm 7.0$         	& $3.3\pm0.2$           & $3.7\pm0.4$           & $6.5\pm1.5$           & $15.0\pm 3.0$         & --          \\
($10^{-9}$)	     & {\bf 1.3}~$\pm$~{\bf 0.6} 	& {\bf 1.5}~$\pm$~{\bf 0.7}& {\bf 3.0}~$\pm$~{\bf 1.2} 	& {\bf 0.6}~$\pm$~{\bf 0.3} & {\bf 0.7}~$\pm$~{\bf 0.3} & {\bf 1.3}~$\pm$~{\bf 0.6} & {\bf 3.0}~$\pm$~{\bf 1.3} & --                     \\
\csh\abd             &     --       	     	&  --                   & $1.0 \pm 0.5$         	& --                    & --                    & --                    & --                    & --          \\
($10^{-10}$)	     &    --                 	& --                    & {\bf 1.0~$\pm$~0.6}    	& --                    & --                    & --                    & --                    & --                     \\
HN$^{13}$C\abd       & $1.2 \pm0.2$          	& $0.3 \pm0.1$          & --                    	& $<$0.11               & --                    & --                    & --                    & --          \\
($10^{-10}$)	     & {\bf 1.6}~$\pm$~{\bf 0.6}	& {\bf 0.4}~$\pm$~{\bf 0.2}& --                    	& {\bf $<$0.2}         & --                    & --                    & --                    & --                     \\
HC$_3$N\abd          &     --       	     	&  --                   & $0.6 \pm 0.2$           	& --                    & --                    & --                    & --                    & --          \\
($10^{-11}$)	     &    --                 	& --                    & {\bf 5.7~$\pm$~2.7}      	& --                    & --                    & --                    & --                    & --                     \\
CS\abc               & $12\pm2$              	& $2.9 \pm0.5$          & --                    	& $0.6\pm0.1$           & $0.4\pm0.1$           & $0.15\pm0.03$         & --                    & --          \\
($10^{-8}$)	     & {\bf 1.6}~$\pm$~{\bf 0.6} 	& {\bf 4.0}~$\pm$~{\bf 1.5}& --                  		& {\bf 0.12}~$\pm$~{\bf0.05}& {\bf 0.08}~$\pm$~{\bf 0.04}& {\bf 0.03}~$\pm$~{\bf 0.01}& --                    & --                    \\
\hline
\end{tabular}
\end{table}