\begin{table}%t2%t3 \caption{\label{Table:fluxes_a}Reddening corrected line ratios, normalized to \Hb$^{(*)}$, for the knots identified in Mrk~1418.} \par \small%\centerline { { \begin{tabular}{llcccccccccccccc} \hline\hline $\lambda$ & Ion & \multicolumn{2}{c}{knot~1} & \multicolumn{2}{c}{knot~2} & \multicolumn{2}{c}{knot~3} & \multicolumn{2}{c}{knot~4} & \multicolumn{2}{c}{knot~5} & \multicolumn{2}{c}{Nucleus} & \multicolumn{2}{c}{Integrated} \\ & & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ & $F_{\lambda}$ & $-W_{\lambda}$ \\ \hline 3727 & [\ion{O}{ii}] & $ 3.19\pm0.27$ & $ 82.14\pm0.93$ & $ 3.43\pm0.30$ & $ 62.70\pm1.03$ & $ 3.10\pm0.31$ & $ 52.25\pm1.81$ & $ 6.00\pm0.56$ & $117.2 \pm3.53$ & $ 5.24\pm0.57$ & $ 65.37\pm3.65$ & $10.45\pm1.38$ & $ 23.53\pm0.78$ & $ 5.44\pm0.43$ & $ 43.28\pm0.25$ \\ 3869 & [\ion{Ne}{iii}] & $ 0.51\pm0.04$ & $ 11.72\pm0.44$ & $ 0.39\pm0.03$ & $ 7.94\pm0.44$ & $ 0.56\pm0.07$ & $ 7.34\pm0.77$ & $ 0.43\pm0.12$ & $ 6.27\pm1.40$ & $ 0.83\pm0.20$ & $ 7.68\pm1.62$ & --- & --- & $ 1.00\pm0.07$ & $ 7.70\pm0.12$ \\ 3968 & [\ion{Ne}{iii}] & $ 0.19\pm0.02$ & $ 4.66\pm0.30$ & $ 0.18\pm0.02$ & $ 3.74\pm0.36$ & --- & --- & --- & --- & --- & --- & --- & & --- & --- \\ 4101 & H$\delta$ & $ 0.28\pm0.02$ & $ 6.82\pm0.22$ & $ 0.30\pm0.02$ & $ 7.31\pm0.32$ & $ 0.37\pm0.07$ & $ 5.31\pm0.46$ & $ 0.26\pm0.08$ & $ 3.93\pm0.71$ & --- & --- & --- & --- & --- & --- \\ 4340 & H$\gamma$ & $ 0.46\pm0.02$ & $ 12.95\pm0.23$ & $ 0.46\pm0.03$ & $ 13.37\pm0.33$ & $ 0.46\pm0.04$ & $ 7.21\pm0.36$ & $ 0.47\pm0.05$ & $ 8.28\pm0.60$ & $ 0.47\pm0.07$ & $ 6.91\pm0.63$ & --- & --- & $ 0.47\pm0.02$ & $ 4.29\pm0.05$ \\ 4363 & [\ion{O}{iii}] & $ 0.05\pm0.01$ & $ 2.00\pm0.23$ & $ 0.05\pm0.01$ & $ 2.29\pm0.37$ & --- & --- & --- & --- & --- & --- & --- & --- & $ 0.10\pm0.04$ & $ 1.02 \pm0.06$ \\ 4861 & H$\beta$ & $ 1.00 $ & $ 31.27\pm0.25$ & $ 1.00 $ & $ 32.96\pm0.34$ & $ 1.00 $ & $ 17.42\pm0.39$ & $ 1.00 $ & $ 18.30\pm0.90$ & $ 1.00 $ & $ 12.73\pm0.68$ & $ 1.00 $ & $ 3.03\pm0.24$ & $ 1.00 $ & $ 10.14\pm0.06$ \\ 4959 & [\ion{O}{iii}] & $ 1.24\pm0.04$ & $ 38.81\pm0.29$ & $ 1.16\pm0.03$ & $ 41.07\pm0.44$ & $ 1.12\pm0.05$ & $ 19.89\pm0.41$ & $ 0.61\pm0.04$ & $ 11.54\pm0.48$ & $ 1.14\pm0.08$ & $ 15.78\pm0.66$ & $ 0.83\pm0.09$ & $ 2.61\pm0.18$ & $ 1.06\pm0.03$ & $ 11.01\pm0.06$ \\ 5007 & [\ion{O}{iii}] & $ 3.62\pm0.10$ & $113.9 \pm0.46$ & $ 3.45\pm0.10$ & $122.70\pm0.51$ & $ 3.19\pm0.12$ & $ 55.06\pm0.49$ & $ 1.78\pm0.09$ & $ 34.54\pm0.54$ & $ 3.29\pm0.18$ & $ 46.81\pm0.90$ & $ 2.34\pm0.20$ & $ 7.61\pm0.20$ & $ 3.16\pm0.09$ & $ 33.48\pm0.09$ \\ 5876 & \ion{He}{i} & --- & --- & $ 0.07\pm0.01$ & $ 3.11\pm0.21$ & $ 0.11\pm0.01$ & $ 2.48\pm0.26$ & $ 0.07\pm0.01$ & $ 1.88\pm0.35$ & $ 0.08\pm0.02$ & $ 1.60\pm0.49$ & --- & --- & $ 0.05\pm0.01$ & $ 0.75\pm0.03$ \\ 6548 & [\ion{N}{ii}] & $ 0.08\pm0.01$ & $ 3.69\pm0.19$ & $ 0.15\pm0.01$ & $ 8.15\pm0.44$ & $ 0.10\pm0.02$ & $ 2.65\pm0.34$ & $ 0.13\pm0.02$ & $ 3.77\pm0.47$ & $ 0.10\pm0.03$ & $ 2.37\pm0.62$ & $ 0.12\pm0.03$ & $ 0.80\pm0.21$ & $ 0.11\pm0.01$ & $ 1.95\pm0.05$ \\ 6563 & H$\alpha$ & $ 2.87\pm0.10$ & $137.6 \pm0.39$ & $ 2.88\pm0.14$ & $154.1 \pm1.35$ & $ 2.90\pm0.20$ & $ 73.72\pm0.79$ & $ 2.87\pm0.15$ & $ 84.12\pm1.41$ & $ 2.87\pm0.16$ & $ 69.03\pm1.48$ & $ 2.86\pm0.34$ & $ 19.63\pm0.27$ & $ 2.86\pm0.07$ & $ 49.87\pm0.10$ \\ 6584 & [\ion{N}{ii}] & $ 0.26\pm0.01$ & $ 12.50\pm0.23$ & $ 0.29\pm0.02$ & $ 15.22\pm0.43$ & $ 0.22\pm0.02$ & $ 5.68\pm0.40$ & $ 0.31\pm0.03$ & $ 9.14\pm0.61$ & $ 0.19\pm0.03$ & $ 4.56\pm0.61$ & $ 0.33\pm0.05$ & $ 2.25\pm0.20$ & $ 0.27\pm0.01$ & $ 4.63\pm0.06$ \\ 6717 & [\ion{S}{ii}] & $ 0.26\pm0.01$ & $ 12.50\pm0.28$ & $ 0.31\pm0.02$ & $ 17.05\pm0.44$ & $ 0.31\pm0.03$ & $ 8.21\pm0.44$ & $ 0.42\pm0.03$ & $ 12.93\pm0.60$ & $ 0.29\pm0.03$ & $ 7.30\pm0.66$ & $ 0.58\pm0.08$ & $ 4.21\pm0.23$ & $ 0.40\pm0.01$ & $ 8.49\pm0.05$ \\ 6731 & [\ion{S}{ii}] & $ 0.21\pm0.01$ & $ 10.22\pm0.25$ & $ 0.23\pm0.02$ & $ 12.69\pm0.43$ & $ 0.20\pm0.02$ & $ 5.43\pm0.41$ & $ 0.32\pm0.02$ & $ 9.87\pm0.57$ & $ 0.20\pm0.03$ & $ 5.17\pm0.68$ & $ 0.42\pm0.06$ & $ 3.02\pm0.21$ & $ 0.30\pm0.01$ & $ 5.52\pm0.07$ \\ & & \multicolumn{2}{c}{$F(\Hb)= 324.6\pm22.7$} & \multicolumn{2}{c}{$F(\Hb)= 166.3\pm15.2$} & \multicolumn{2}{c}{$F(\Hb)= 67.4\pm11.3$} & \multicolumn{2}{c}{$F(\Hb)= 84.6\pm 6.0$} & \multicolumn{2}{c}{$F(\Hb)= 42.4\pm 3.9$} & \multicolumn{2}{c}{$F(\Hb)= 106.3\pm30.4$} & \multicolumn{2}{c}{$F(\Hb)=1871.9\pm62.6$} \\ & & \multicolumn{2}{c}{$C(\Hb)=0.111\pm0.032$} & \multicolumn{2}{c}{$C(\Hb)=0.073\pm0.035$} & \multicolumn{2}{c}{$C(\Hb)=0.123\pm0.064$} & \multicolumn{2}{c}{$C(\Hb)=0.267\pm0.025$} & \multicolumn{2}{c}{$C(\Hb)=0.361\pm0.030$} & \multicolumn{2}{c}{$C(\Hb)=0.625\pm0.105$} & \multicolumn{2}{c}{$C(\Hb)=0.316\pm0.011$} \\ & & \multicolumn{2}{c}{$W_{\rm abs}=3.2\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=2.9\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=2.9\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=1.7\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=1.4\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=3.0\AA$} & \multicolumn{2}{c}{$W_{\rm abs}=2.1\AA$} \\[2pt] \hline \end{tabular}}} \medskip (*) Notes. -- Reddening-corrected line fluxes, normalized to $F(\Hb)=1$. Equivalent widths of Balmer lines are corrected for underlying stellar absorption. The reddening coefficients, $C(\Hb)$, the value of the absorption correction, $EW_{\rm abs}$, and the reddening-corrected \Hb~flux, $F(\Hb) (\times 10^{-16}$~erg~cm$^{-2}$~s$^{-1}$) are listed for each region. In the nuclear region, only \Hb\ and \Hb\ could be measured, so~we were unable to compute $EW_{\rm abs}$ and~$C(\Hb)$ simultaneously; to determine the latter we assumed $EW_{\rm abs}=3.0$. The quoted uncertainties include measurements, flux-calibration and reddening coefficient errors. \end{table}