\begin{table}%t1 \caption{Emission line fluxes.} \label{emlines} \small %\centerline { \begin{tabular}{llllll} \hline \hline \noalign{\smallskip} Line ratios & Region 1 & Region 2 & Region 3 & Region 4 & Region 5 \\ & 29\farcs3 & 54\farcs4 & 18\farcs4 & 85\farcs6 & 83\farcs7 \\ \noalign{\smallskip} \hline \noalign{\smallskip} $[$N II$]$ $\lambda$ 6583/ H$\alpha$ & 0.76 $\pm$ 0.05 & 0.70 $\pm$ 0.08 & 0.60 $\pm$ 0.10 & 0.21 $\pm$ 0.11 & 0.15 $\pm$ 0.06\\ $[$S II$]$ $\lambda$ 6716 + 6731/ H$\alpha$ & 0.99 $\pm$ 0.09 & 0.88 $\pm$ 0.14 & 0.80 $\pm$ 0.18 & 0.15 $\pm$ 0.13 & 0.21 $\pm$ 0.07\\ $[$S II$]$ $\lambda$6716/$[$S II$]$ $\lambda$6731 & 1.46 $\pm$ 0.18 & 1.52 $\pm$ 0.33 & 1.34 $\pm$ 0.44 & $\ga$1.3 & $\ga$1.5 \\ \hline \end{tabular}} \medskip $^a$ Lower limits to the $[$S II$]$ $\lambda$6716/$[$S II$]$ $\lambda$6731 ratio are provided assuming a 1$\sigma$ upper limit to the flux of the $\lambda$6731 line, if the line is not detected. \end{table}