Table 2: Heavy element abundances.
Property Bright Total
$T_{\rm e}$(O III), K $20~120\pm240$ $20360\pm480$
$T_{\rm e}$(O II), K $15~620\pm170$ $15630\pm340$
$T_{\rm e}$(S III), K $18~750\pm200$ $18910\pm400$
$N_{\rm e}$(O II), cm-3 $120\pm50$ $150\pm80$
$N_{\rm e}$(Ar IV), cm-3 $6000\pm2000$ ...
$N_{\rm e}$(S II), cm-3 $146\pm41$ $213\pm74$
O+/H+, ($\times$105) $0.164\pm0.005$ $0.211\pm0.013$
O2+/H+, ($\times$105) $1.838\pm0.054$ $1.664\pm0.090$
O3+/H+, ($\times$105) $0.032\pm0.001$ $0.081\pm0.006$
O/H, ($\times$105) $2.034\pm0.054$ $1.956\pm0.091$
12+log O/H $7.31 \pm 0.01$ $7.29 \pm 0.02$
N+/H+, ($\times$107) $0.779\pm0.019$ 0 $.673\pm0.033$
ICF(N) 11.25 8.53
N/H, ($\times$107) $8.765\pm0.235$ $5.741\pm0.304$
log N/O $-1.37\pm0.02$ - $1.53\pm0.03$
Ne2+/H+, ($\times$106) $2.977\pm0.092$ $2.941\pm0.199$
ICF(Ne) 1.04 1.06
Ne/H, ($\times$106) $3.099\pm0.102$ $3.126\pm0.234$
log Ne/O $- 0.82\pm0.02$ $-0.80\pm0.04$
S+/H+, ($\times$107) $0.314\pm0.006$ $0.348\pm0.013$
S2+/H+, ($\times$107) $1.539\pm0.052$ $1.433\pm0.136$
ICF(S) 2.36 1.93
S/H, ($\times$107) $4.363\pm0.122$ $3.431\pm0.264$
log S/O $-1.67\pm0.02$ $-1.76\pm0.04$
Cl2+/H+, ($\times$109) $2.846\pm0.560$ ...
ICF(Cl) 1.48 ...
Cl/H, ($\times$109) $4.207\pm0.827$ ...
log Cl/O $ -3.68\pm0.09$ ...
Ar2+/H+, ($\times$108) $4.478\pm0.094$ $4.408\pm0.199$
ICF(Ar) 1.49 1.34
Ar/H, ($\times$108) $6.680\pm0.287$ $5.900\pm0.812$
log Ar/O $-2.48\pm0.02$ $-2.52\pm0.06$
Fe2+/H+, ($\times$107) $0.453\pm0.033$ ...
ICF(Fe) 17.02 ...
Fe/H, ($\times$107) $7.717\pm0.567$ ...
log Fe/O $-1.42\pm0.03$ ...


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