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Table 3

Observed, , and dereddened , nebular emission line fluxes relative to Hβ = 100, and the fractional ionic abundance in that line relative to that of hydrogen, .

λ Ion

3967.46+3970.07a [Ne iii]+H i 14.63 ±1.07 47.10 ±3.46 - -
4340.47 H i 23.64 ±0.40 47.77 ±0.92 47.00
4363.21 [O iii] 7.09 ±0.40 13.91 ±0.82 4.23 × 10-4 14.08
4471.50 He i 3.00 ±0.39 5.09 ±0.66 0.098 ± 0.012 5.41
4685.68 He ii 14.32 ±4.76 13.25 0.011 14.24
4711.37 [Ar iv] 4.25 ±0.22 5.23 ±0.27 1.07 × 10-6 5.19
4740.17 [Ar iv] 4.37 ±0.86 4.87 1.07 × 10-6 ± 2.03 × 10-7 4.30
4861.33 H i 100.00 ±0.70 100.01 ±0.00 100.00
4958.91 [O iii] 541.81 ±4.87 474.40 ±5.30 3.51 × 10-4 ± 4.91 × 10-5 472.30
5006.84 [O iii] 1696.82 ±4.82 1391.98 ±9.67 3.46 × 10-4 ± 4.82 × 10-5 1409.35
5412.73 He ii 3.24 ±0.44 1.54 ±0.21 0.013 ±0.002 1.31
5754.60 [N ii] 5.99 ±0.45 2.04 ±0.15 1.06 × 10-5 1.78
5875.66 He i 48.16 ±0.46 14.64 ±0.16 0.094 14.82
6300.30 [O i] 18.31 ±10.94 1.68 1.84 × 10-6 0.76
6312.10 [S iii] 12.47 ±11.64 0.58 6.65 × 10-7 0.32
6363.77 [O i] 7.43 ±10.59 0.07 2.39 × 10-7 0.38
6548.10 [N ii] 197.20 ±12.59 33.77 ±2.16 1.16 × 10-5 ± 1.38 × 10-6 36.44
6562.77 H i 1680.91 ±11.84 284.62 283.83
6583.50 [N ii] 549.71 ±11.99 91.53 ±2.13 1.03 × 10-5 ± 9.80 × 10-7 111.30
6678.16 He i 25.82 ±10.08 2.60 0.067 4.14
6716.44 [S ii] 88.57 ±2.06 13.30 ±0.33 4.29 × 10-7 ± 3.62 × 10-8 13.16
6730.82 [S ii] 85.22 ±2.07 12.66 ±0.33 4.30 × 10-7 ± 3.63 × 10-8 12.64
7065.25 He i 21.84 ±2.10 2.54 ±0.25 0.102 ± 0.010 2.96
7135.80 [Ar iii] 151.84 ±2.02 16.84 ±0.28 1.21 × 10-6 ± 1.23 × 10-7 12.59
7281.35 He i 6.09 ±5.95 0.13 0.02 0.84
7751.43 [Ar iii] 52.08 ±2.98 3.91 ±0.23 1.17 × 10-6 ± 1.37 × 10-7 3.02
9068.60 [S iii] 352.73 ±4.24 13.75 ±0.26 1.42 × 10-6 ± 1.25 × 10-7 8.04

4740/4711 [Ar iv] 0.93 0.83
6731/6717 [S ii] 0.95 ± 0.03 0.96
(4959+5007)/4363 [O iii] 134.05 ± 7.96 133.60
(6584+6548)/5754 [N ii] 61.94 ± 4.92 82.92

Notes. The final column shows the fluxes predicted by our mocassin photoionisation model. The lower part of the table lists a series of emission line diagnostic ratios and their measured and modelled values.

(a)

The value measured in the spectrum is a blend of the two lines listed, while the model values are for the individual components

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