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Table A.2:

Results of the oxygen abundance, in the form $12+\log({\rm O/H})$, for objects with a direct estimation of the metallicity, considering several empirical calibrations.

Region 		Branch $T_{\rm e}$ EP84 MRS85 M91 ZKH94 P00 P01a PT05b KD02 KK04 D02 PP04a PP04b PP04c N06ac N06b N06c
      R23 R23 R23, y R23 R23 R23, P R23, P R23, q R23, q N2 N2 N2 O3N2 R23 N2 O3N2
HCG 31 AC H $8.22\pm0.05$ 8.25 8.89 8.67 8.74 8.47 8.15 8.09 7.99 8.12 8.40 8.34 8.29 8.30 8.05 8.16 8.22
HCG 31 B H $8.14\pm0.08$ 8.14 8.48 8.29 8.44 8.24 8.22 8.12 8.41 8.44 8.39 8.33 8.28 8.29 8.07 8.16 8.20
HCG 31 E H $8.13\pm0.09$ 8.17 8.62 8.14 8.53 8.31 8.18 8.13 8.19 8.32 8.35 8.30 8.26 8.25 8.07 8.11 8.15
HCG 31 F1 L $8.07\pm0.06$ 8.02 8.30 8.13 ... 7.86 8.12 7.99 8.46 8.33 8.05 8.07 8.09 8.03 ... 7.81 7.67
HCG 31 F2 L $8.03\pm0.10$ 7.90 8.54 8.06 8.48 7.76 8.13 7.95 8.19 8.27 8.06 8.07 8.10 8.07 8.07 7.83 7.79
HCG 31 G H $8.15 \pm 0.08$ 8.13 8.43 8.26 8.40 8.22 8.11 8.17 8.31 8.42 8.41 8.34 8.29 8.26 8.07 8.17 8.16
Mkn 1199 C H $8.75\pm0.12$ 9.37 9.26 9.00 9.18 9.19 8.71 8.54 9.14 9.14 8.92 8.74 8.90 8.81 9.18 8.78 8.94
Haro 15 A H $8.10\pm0.06$ 8.08 ... 8.14 ... 7.91 8.12 8.12 8.48 8.34 7.98 8.01 8.05 7.97 ... 7.74 7.38
Mkn 5 A1 L $8.07 \pm 0.07$ 7.90 8.54 8.04 8.48 7.76 8.13 8.13 8.19 8.26 8.18 8.17 8.16 8.12 8.07 7.94 7.89
Mkn 5 A2 L $8.08 \pm 0.07$ 7.95 8.43 8.14 8.41 7.81 7.92 8.17 8.18 8.33 8.16 8.15 8.15 8.11 8.07 7.92 7.87
IRAS 08208+2816 H $8.33\pm0.08$ 8.15 8.50 8.55 8.46 8.25 8.42 8.35 8.35 8.25 8.47 8.39 8.34 8.23 8.35 8.23 8.11
POX 4 L $8.03\pm0.04$ 8.15 ... 8.20 ... 7.97 7.92 8.06 8.48 8.40 7.78 7.86 7.91 7.87 ... 7.53 ...
UM 420 L $7.95\pm0.05$ 7.78 8.73 7.98 8.61 7.66 7.85 7.86 8.02 8.16 8.20 8.39 8.33 8.28 7.57 8.15 8.14
SBS 0926+606A L $7.94\pm0.08$ 7.88 8.57 7.97 8.50 7.75 7.77 7.80 8.17 8.20 7.97 8.00 8.05 8.02 7.71 7.73 7.64
SBS 0948+532 L $8.03\pm0.05$ 8.01 8.31 8.06 ... 7.86 7.82 8.10 8.34 8.28 7.91 7.95 8.01 7.95 ... 8.01 ...
SBS 1054+365 L $8.00\pm0.07$ 8.05 8.21 8.09 ... 7.89 7.84 7.91 8.48 8.30 7.87 7.93 7.98 7.93 ... 7.63 ...
SBS 1211+540 L $7.65\pm0.04$ 7.86 8.60 7.85 8.52 7.73 7.68 7.65 8.02 8.10 7.58 7.70 7.69 7.84 7.68 7.31 ...
SBS 1319+579A L $8.05\pm0.06$ 8.09 ... 8.13 ... 7.93 8.11 8.11 8.48 8.33 7.77 7.85 7.90 7.88 ... 7.52 ...
SBS 1319+579B L $8.12\pm0.10$ 7.85 8.62 8.01 8.53 7.72 8.13 8.12 8.13 8.23 8.14 8.14 8.14 8.11 8.07 7.90 7.89
SBS 1319+579 C L $8.15\pm0.07$ 7.85 8.62 8.02 8.53 7.72 8.13 8.13 8.12 8.23 8.18 8.17 8.16 8.13 8.06 7.94 7.93
SBS 1415+437 C L $7.58\pm0.05$ 7.63 8.91 7.72 8.76 7.53 7.57 7.55 7.86 7.99 7.79 7.86 7.92 7.99 7.39 7.55 7.55
SBS 1415+437 A L $7.61\pm0.06$ 7.58 8.96 7.64 8.80 7.49 7.50 7.48 7.82 7.92 7.72 7.81 7.86 7.97 7.34 7.48 7.41
III Zw 107 H $8.23\pm0.09$ 8.17 8.62 8.57 8.53 8.31 8.40 8.35 8.13 8.24 8.39 8.33 8.28 8.23 8.46 8.15 8.10
Tol 9 INT H $8.58 \pm 0.15$ 8.30 9.00 8.76 8.84 8.58 8.61 8.55 8.95 8.90 8.68 8.56 8.54 8.42 8.77 8.46 8.40
Tol 9 NOT H $8.55 \pm 0.16$ 8.29 8.97 8.73 8.81 8.55 8.56 8.50 8.94 8.88 8.72 8.59 8.59 8.44 8.75 8.51 8.44
Tol 1457-262A L $8.05\pm0.07$ 8.09 ... 8.26 ... 7.92 8.11 8.20 8.58 8.42 8.04 8.06 8.09 8.02 ... 7.80 7.63
Tol 1457-262B L $7.88\pm0.07$ 8.55 ... 8.21 ... 7.87 7.91 8.21 8.38 8.29 7.88 7.93 7.99 7.96 ... 7.60 ...
Tol 1457-262C L $8.06\pm0.11$ 8.48 ... 8.21 ... 7.88 8.00 8.24 8.48 8.37 8.07 8.08 8.10 8.06 ... 7.83 7.77
ESO 566-8 H $8.46\pm0.11$ 8.27 8.92 8.68 8.77 8.50 8.44 8.38 8.92 8.84 8.84 8.68 8.76 8.51 8.70 8.66 8.53
NGC 5253 A H $8.18\pm0.04$ 8.09 8.24 8.13 ... 8.15 8.11 8.13 8.53 8.33 8.40 8.34 8.28 8.17 ... 8.16 8.00
NGC 5253 B H $8.19\pm0.04$ 8.09 8.21 8.14 ... 8.14 8.11 8.13 8.48 8.34 8.34 8.29 8.25 8.14 ... 8.10 7.94
NGC 5253 C L $8.28\pm0.04$ 8.14 8.46 8.53 8.42 8.23 8.38 8.32 8.67 8.63 8.11 8.11 8.13 8.08 8.30 7.87 7.80
NGC 5253 D L $8.31\pm0.07$ 8.15 8.52 8.19 8.47 8.26 8.23 8.17 8.32 8.37 8.31 8.27 8.23 8.22 8.37 8.07 8.10

Notes. The empirical calibrations and the parameters used for each of them are: EP84: Edmunds & Pagel (1984) that involves the R23 parameter; MRS85: McCall et al. (1985) using R23; M91: McGaugh (1991) using R23 and y; ZKH94: Zaritsky et al. (1994) using R23; P00: Pilyugin (2000) using R23; P01: Pilyugin (2001a,b) using R23 and P; KD02: Kewley & Dopita (2002) using R23 and q; KK04: Kobulnicky & Kewley (2004) using R23 and q; D02: Denicoló et al. (2002) using the N2 parameter; PP04: Pettini & Pagel (2004), using (a) N2 with a linear fit, (b) N2 with a cubic fit, (c) the O3N2 parameter; N06: Nagao et al. (2006) using the cubic relations involving the R23 (a), N2 (b) and O3N2 (c) parameters. The value compiled in the column labeled $T_{\rm e}$ is the oxygen abundance derived by the direct method.

(a) The value listed for P01 is the average value between the high- and the low-metallicity branches for objects with $7.90<12+\log({\rm O/H})<8.20$.
(b) The value listed for PT05 is the average value between the high- and the low-metallicity branches for objects with $8.05<12+\log({\rm O/H})<8.20$.
(c) The value listed for N06 is the average value between the high- and the low-metallicity branches for objects with $8.00<12+\log({\rm O/H})<8.15$.


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