\begin{table}%T5 \caption{\label{tab:models}Photoionization models versus observations. Line intensities are in units of H$\beta=100$ in the corresponding aperture.} \small%%\centering \par \begin{tabular}{rr@{\hspace{5mm}}r@{\hspace{-2mm}}r@{\hspace{1mm}}r@{\hspace{10mm}}@{\extracolsep{5mm}}rrrrr} \hline\hline\noalign{\smallskip} {} (1) & (2)\tablefootmark{a} & & (3) & (4) & (5) & (6) & (7) & (8) & (9) \\ {} & & & & & {R} & {Mi} & {Ma} & {HeMi} & {HeMa} \\ \hline\noalign{\smallskip} {} & & & {$T_{\rm h}$} & 10$^3$K & 170 & 170 & 170 & 170 & 170 \\ {} & & & {$L_{\rm h}$} & {[\lsun]} & 2564 & 1618 & 4064 & 1618 & 4064 \\ {} & & & {log $g_{\rm h}$} & & 6.7 & 6.7 & 6.7 & 6.7 & 6.7 \\ % {} & & & {Mass$_h$} & {[\msun]} & 0.635 & 0.401 & 1.006 & 0.401 & 1.006 \\ % {} & & & {R$_V$} & & 3.1 & 3.1 & 3.1 & 3.1 & 3.1 \\ % {} & & & {E$_{B-V}$} & mag & 0.03 & 0.03 & 0.03 & 0.03 & 0.03 \\ % {} & & & {N$_H$} & 10$^{20}$ cm$^{-2}$ & 2.7 & 2.7 & 2.7 & 2.7 & 2.7 \\ {} & & & {$n_0$} & cm$^{-3}$ & 181 & 181 & 181 & 181 & 181 \\ % {} & & & {ff} & & 1 & 1 & 1 & 1 & 1 \\ Sun\tablefootmark{b} & & & & & & & & & \\ {} 10.93 & & & {He\tablefootmark{c} } & & 10.95 & 10.95 & 10.95 & 10.98 & 10.91 \\ % {} & & & {C$^{a}$ } & & 16.16 & 16.36 & 15.95 & 16.36 & 15.95 \\ % {} & & & {N$^{a}$ } & & 16.85 & 17 & 16.68 & 17 & 16.68 \\ % {} & & & {O$^{a}$ } & & 17.18 & 17.37 & 16.87 & 17.37 & 16.87 \\ % {} & & & {Ne$^{a}$ } & & 17.17 & 17.24 & 17.1 & 17.24 & 17.1 \\ {} 8.39 & & & {C\tablefootmark{c} } & & 7.84 & 7.64 & 8.05 & 7.64 & 8.05 \\ {} 7.78 & & & {N\tablefootmark{c} } & & 7.15 & 7 & 7.32 & 7 & 7.32 \\ {} 8.66 & & & {O\tablefootmark{c} } & & 6.82 & 6.63 & 7.13 & 6.63 & 7.13 \\ {} 7.85 & & & {Ne\tablefootmark{c} } & & 6.83 & 6.76 & 6.9 & 6.76 & 6.9 \\ {} 7.14 & & & {S\tablefootmark{c} } & & 5.65 & 5.5 & 5.83 & 5.5 & 5.83 \\ {} 6.18 & & & {Ar\tablefootmark{c} } & & 4.7 & 4.5 & 4.92 & 4.5 & 4.92 \\ & & & & & & & & & \\ {} & & & {$d$} & {[kpc]} & 22.5 & 22.3 & 22.9 & 22.3 & 22.9 \\ {} & & & {$F_\beta$\tablefootmark{d}} & & 2.55 & 2.52 & 2.56 & 2.54 & 2.54 \\ {} & & & {$M$(H)} & {[\msun]} & 0 & 0.14 & 0.15 & 0.14 & 0.15 \\ {} & & & {$f$(STIS) } & & 0.91 & 0.91 & 0.91 & 0.92 & 0.91 \\ {} & & & {$f$(IRS) } & & 0.91 & 0.88 & 0.94 & 0.87 & 0.95 \\ & & & & $\Delta$O/O & & & & & \\ {} H8 & 0 & & 9.51 & 0.15 & 9.01 & 9.02 & 9.02 & 8.96 & 9.09 \\ {} H8 & 4 & & 9.29 & 0.15 & 9.15 & 9.19 & 9.14 & 9.12 & 9.21 \\ {} H7 & 0 & & 12.99 & 0.1 & 14.18 & 14.22 & 14.18 & 14.12 & 14.28 \\ {} H7 & 4 & & 13.6 & 0.1 & 14.39 & 14.46 & 14.36 & 14.36 & 14.47 \\ {} H6 & 0 & & 25.66 & 0.07 & 23.64 & 23.70 & 23.64 & 23.54 & 23.81 \\ {} H6 & 4 & & 25.71 & 0.07 & 23.87 & 23.96 & 23.85 & 23.80 & 24.03 \\ {} H$\gamma$ & 0 & & 47.84 & 0.05 & 47.40 & 47.47 & 47.34 & 47.41 & 47.41 \\ {} H$\gamma$ & 4 & & 46.73 & 0.05 & 47.64 & 47.71 & 47.59 & 47.65 & 47.66 \\ {} H$\alpha$ & 5 & & 251.41 & 0.04 & 282.06 & 282.48 & 281.30 & 283.21 & 280.50 \\ {} H$\alpha$ & 4 & & 311.03 & 0.04 & 279.89 & 280.14 & 279.23 & 280.85 & 278.43 \\ {} HeI5876 & 5 & & $<$0.19 & & 0.16 & 0.25 & 0.11 & 0.27 & 0.10 \\ {} HeI7065 & 4 & & $<$1.44 & & 0.04 & 0.06 & 0.03 & 0.06 & 0.02 \\ {} HeII1640 & 1 & & 609.18 & 0.1 & 594.53 & 572.27 & 623.3 & 607.55 & 575.72 \\ {} HeII4686 & 0 & & 77.88 & 0.04 & 76.53 & 73.85 & 79.67 & 78.35 & 73.60 \\ {} HeII4686 & 4 & & 74.93 & 0.04 & 76.16 & 74.00 & 78.91 & 78.52 & 72.93 \\ {} HeII5412 & 4 & & 5.43 & 0.1 & 6.19 & 6.02 & 6.38 & 6.40 & 5.88 \\ & & & & & & & & & \\ % {} CII4267 & 0 & & $<$0.32 & & 0 & 0 & 0 & 0 & 0 \\ {} CIII]1909 & 1 & & $<$61.44 & & 73.41 & 89.01 & 59.96 & 93.05 & 56.73 \\ {} CIII977 & 2 & & $<$430.3 & & 104.58 & 112.54 & 96.78 & 117.74 & 92.22 \\ % {} CIII4069 & 0 & & $<$0.59 & & 0.02 & 0.02 & 0.03 & 0.02 & 0.03 \\ % {} CIII4649 & 0 & & $<$0.38 & & 0.02 & 0.02 & 0.02 & 0.02 & 0.02 \\ {} CIV1549 & 1 & & 1054.84 & 0.2 & 1050.89 & 890.87 & 1246.07 & 916.75 & 1200.76 \\ {} CIV4659 & 0 & & $<$0.38 & & 0.14 & 0.08 & 0.26 & 0.08 & 0.26 \\ & & & & & & & & & \\ % {} [NII]6584 & 4 & & $<$1.45 & & 0.03 & 0.04 & 0.01 & 0.04 & 0.01 \\ % {} [NII]r6584 & 4 & & $<$1.45 & & 0 & 0 & 0 & 0 & 0 \\ {} [NIII]57.2 & 6 & & & & 1.23 & 1.54 & 0.96 & 1.56 & 0.93 \\ {} NIII]1750 & 1 & & $<$60.84 & & 3.00 & 4.29 & 1.99 & 4.49 & 1.87 \\ % {} NIII4379 & 0 & & $<$0.09 & & 0.01 & 0.01 & 0.01 & 0.01 & 0.01 \\ {} NIII991 & 2 & & $<$423.77 & & 7.54 & 9.52 & 5.91 & 9.81 & 5.69 \\ {} NIV]1486 & 1 & & 73.05 & 0.5 & 65.89 & 67.40 & 61.95 & 69.93 & 58.82 \\ {} NV1240 & 1 & & 339.3 & 0.3 & 330.38 & 253.7 & 425.38 & 259.25 & 410.86 \\ % {} NV4945 & 0 & & $<$0.28 & & 0.02 & 0.01 & 0.04 & 0.01 & 0.04 \\ % {} NV7618 & 4 & & $<$1.43 & & 0.01 & 0.01 & 0.02 & 0.01 & 0.02 \\ % {} NV7618 & 4 & & $<$1.43 & & 0.01 & 0.01 & 0.02 & 0.01 & 0.02 \\ & & & & & & & & & \\ % {} [OII]3727 & 0 & & $<$0.62 & & 0.01 & 0.02 & 0.01 & 0.02 & 0.01 \\ % {} [OII]7325 & 4 & & $<$1.43 & & 0 & 0 & 0 & 0 & 0 \\ {} [OIII]4363 & 0 & & $<$0.42 & & 0.11 & 0.14 & 0.12 & 0.15 & 0.11 \\ {} [OIII]5007 & 0 & & 2.52 & 0.3 & 2.57 & 3.24 & 2.58 & 3.35 & 2.49 \\ {} OIV]1402 & 1 & & $<$36.97 & & 7.68 & 6.88 & 10.60 & 7.15 & 10.05 \\ {} [OIV]25.9 & 3 & & 13.72 & 0.3 & 13.57 & 11.20 & 20.35 & 11.24 & 20.13 \\ % {} OIV4632 & 0 & & $<$0.38 & & 0.01 & 0 & 0.01 & 0 & 0.01 \\ % {} OV4930 & 0 & & $<$0.28 & & 0 & 0 & 0.01 & 0 & 0.01 \\ {} OVI1032 & 2 & & $<$407.42 & & 50.48 & 30.45 & 105.06 & 30.65 & 102.45 \\ & & & & & & & & & \\ % {} [NeII]12.8 & 3 & & $<$7.23 & & 0 & 0 & 0 & 0 & 0 \\ {} [NeIII]3869 & 0 & & 0.79 & 0.5 & 0.82 & 1.45 & 0.44 & 1.50 & 0.43 \\ {} [NeIII]15.5 & 3 & & $<$7.22 & & 0.21 & 0.37 & 0.11 & 0.38 & 0.11 \\ {} [NeIII]36.0 & 3 & & $<$28.88 & & 0.02 & 0.03 & 0.01 & 0.03 & 0.01 \\ {} [NeIV]2424 & 6 & & & & 25.20 & 29.46 & 20.51 & 30.10 & 19.93 \\ {} [NeV]3426 & 0 & & 57.67 & 0.2 & 58.32 & 48.63 & 66.92 & 49.19 & 65.84 \\ {} [NeV]14.3 & 3 & & 29.62 & 0.3 & 43.25 & 35.05 & 50.69 & 34.84 & 50.91 \\ {} [NeV]24.3 & 3 & & 54.17 & 0.2 & 54.44 & 44.16 & 63.76 & 43.90 & 64.03 \\ {} [NeVI]7.6 & 6 & & & & 27.47 & 15.98 & 45.07 & 15.84 & 45.48 \\ & & & & & & & & & \\ % {} [ArII]7.0 & 6 & & & & 0 & 0 & 0 & 0 & 0 \\ % {} [ArIII]7135 & 4 & & $<$1.44 & & 0.02 & 0.02 & 0.01 & 0.02 & 0.01 \\ % {} [ArIII]9.0 & 6 & & & & 0.01 & 0.02 & 0.01 & 0.02 & 0.01 \\ % {} [ArIII]21.8 & 3 & & $<$3.61 & & 0 & 0 & 0 & 0 & 0 \\ {} [ArIV]4711 & 0 & & $<$0.15 & & 0.15 & 0.15 & 0.14 & 0.16 & 0.13 \\ {} [ArIV]4740 & 0 & & $<$0.15 & & 0.12 & 0.12 & 0.11 & 0.13 & 0.10 \\ {} [ArV]7005 & 4 & & $<$1.44 & & 0.27 & 0.23 & 0.31 & 0.23 & 0.30 \\ \hline {} (1) & (2)\tablefootmark{a} & & (3) & (4) & (5) & (6) & (7) & (8) & (9) \\ {} & & & & & {R} & {Mi} & {Ma} & {HeMi} & {HeMa} \\ \hline {} [ArV]8.0 & 6 & & & & 0.29 & 0.22 & 0.37 & 0.22 & 0.36 \\ {} [ArV]13.1 & 3 & & $<$7.23 & & 0.45 & 0.33 & 0.57 & 0.33 & 0.57 \\ & & & & & & & & & \\ % {} [SII]6720 & 4 & & $<$1.45 & & 0.02 & 0.02 & 0.01 & 0.03 & 0.01 \\ % {} [SIII]6312 & 4 & & $<$1.45 & & 0.06 & 0.08 & 0.04 & 0.09 & 0.04 \\ {} [SIII]9069 & 4 & & $<$1.41 & & 0.24 & 0.31 & 0.17 & 0.32 & 0.16 \\ {} [SIII]18.7 & 3 & & $<$7.22 & & 0.21 & 0.25 & 0.17 & 0.25 & 0.16 \\ {} [SIII]33.5 & 3 & & $<$36.1 & & 0.34 & 0.41 & 0.28 & 0.42 & 0.27 \\ {} [SIV]10.5 & 3 & & $<$7.23 & & 6.65 & 6.29 & 6.88 & 6.35 & 6.74 \\ & & & & & & & & & \\ {} NV1240/ NIV]1486 & 1/1 & & 4.645 & 0.7 & 5.01 & 3.76 & 6.86 & 3.71 & 6.98 \\ {} [OIV]25.9/[OIII]5007 & 3/0 & & 0.139 & 0.4 & 0.13 & 0.087 & 0.20 & 0.085 & 0.21 \\ {} [OIV]25.9/[OIII]5007 & 3/4 & & 0.194 & 0.4 & 0.22 & 0.136 & 0.35 & 0.134 & 0.36 \\ {} [NeV]3426/[NeIII]3869 & 0/0 & & 73.021 & 0.7 & 71.33 & 33.47 & 151.80 & 32.84 & 154.26 \\ {} [NeV]3426/[NeIV]4720 & 0/0 & & 99.039 & 0.3 & 127.42 & 89.66 & 181.34 & 87.90 & 185.72 \\ {} [NeV]24.3/ [NeV]3426 & 3/0 & & 0.024 & 0.3 & 0.024 & 0.023 & 0.024 & 0.020 & 0.025 \\ {} [NeV]24.3/ [NeV]14.3 & 3/3 & & 1.828 & 0.3 & 1.26 & 1.26 & 1.26 & 1.26 & 1.26 \\ % {} & & & & & & & & & \\ % {} & & & & {He/H} & 10.95 & 10.95 & 10.95 & 10.98 & 10.91 \\ % {} & & & & {C/H} & 16.16 & 16.36 & 15.95 & 16.36 & 15.95 \\ % {} & & & & {N/H} & 16.85 & 17 & 16.68 & 17 & 16.68 \\ % {} & & & & {O/H} & 17.18 & 17.37 & 16.87 & 17.37 & 16.87 \\ % {} & & & & {Ne/H} & 17.17 & 17.24 & 17.1 & 17.24 & 17.1 \\ % {} & & & & {C/H} & 7.84 & 7.64 & 8.05 & 7.64 & 8.05 \\ % {} & & & & {N/H} & 7.15 & 7 & 7.32 & 7 & 7.32 \\ % {} & & & & {O/H} & 6.82 & 6.63 & 7.13 & 6.63 & 7.13 \\ % {} & & & & {Ne/H} & 6.83 & 6.76 & 6.9 & 6.76 & 6.9 \\ % {} & & & & {S/H} & 5.65 & 5.5 & 5.83 & 5.5 & 5.83 \\ % {} & & & & {Ar/H} & 4.7 & 4.5 & 4.92 & 4.5 & 4.92 \\ % {} & & & & & & & & & \\ % {} & & & & & & & & & \\ % {} & & & & log C/O & 1.02 & 1.01 & 1.02 & 1.02 & 1.02 \\ % {} & & & & log N/O & 0.33 & 0.37 & 0.19 & 0.37 & 0.19 \\ % {} & & & & log Ne/O & 0.01 & 0.13 & -0.23 & 0.13 & -0.23 \\ % {} & & & & log S/O & -1.17 & -1.13 & -1.3 & -1.13 & -1.3 \\ % {} & & & & log Ar/O & -2.12 & -2.13 & -2.21 & -2.13 & -2.21 \\ % {} & & sun & & & & & & & \\ % {} & & He & 10.93 & log(He-Hesol) & 0.02 & 0.02 & 0.02 & 0.05 & -0.02 \\ % {} & & c & 8.39 & & -0.55 & -0.75 & -0.34 & -0.75 & -0.34 \\ % {} & & n & 7.78 & & -0.63 & -0.78 & -0.46 & -0.78 & -0.46 \\ % {} & & o & 8.66 & & -1.84 & -2.03 & -1.53 & -2.03 & -1.53 \\ % {} & & ne & 7.85 & & -1.02 & -1.09 & -0.95 & -1.09 & -0.95 \\ % {} & & s & 7.14 & & -1.49 & -1.64 & -1.31 & -1.64 & -1.31 \\ % {} & & ar & 6.18 & & -1.48 & -1.68 & -1.26 & -1.68 & -1.26 \\ % {} & & & & & & & & & \\ % {} & & & He & 1/fract of solar & 0.95 & 0.95 & 0.95 & 0.891250938 & 1.047128548 \\ % {} & & & c & & 3.55 & 5.62 & 2.18 & 5.623413252 & 2.187761624 \\ % {} & & & n & & 4.26 & 6.02 & 2.88 & 6.025595861 & 2.884031503 \\ % {} & & & o & & 69.18 & 107.15 & 33.88 & 107.1519305 & 33.88441561 \\ % {} & & & ne & & 10.47 & 12.30 & 8.91 & 12.30268771 & 8.912509381 \\ % {} & & & s & & 30.90 & 43.65 & 20.42 & 43.65158322 & 20.41737945 \\ % {} & & & ar & & 30.20 & 47.86 & 18.20 & 47.86300923 & 18.19700859 \\ \hline \end{tabular} \tablefoot{\tablefoottext{a}{Labels for the observing slits: 0: CFHT 2003; 1: STIS; 2: FUSE; 3: \emph{Spitzer}; 4: SDSS; 5: CFHT 2001;} \tablefoottext{b}{Asplund, Grevesse \& Sauval (2005);} \tablefoottext{c}{abundances in units of 12 + log X/H;} \tablefoottext{d}{in units of 10$^{-14}$~\ergcmsq.}} \end{table}