Table 4: Visual spectrum of NGC 3242.
$\lambda $ Ion Intensities $^{\dagger}$ Average
(Å)   (1) (2) (3) Intens.
3426 [Ne V]   1.73   1.73
3727$^{\ast}$ [O II] 14.4 6.0 11.2 12
3869 [Ne III] 103 88.8 91 93
4101 H 26.6 27.0 25.8  
4267 C II 0.62 0.77 0.72 0.70
4340 H 47.4 46.8 44.6  
4363 [O III] 13.5 14.0 12.0 13.5
4471 He I 4.12 3.52 3.56 3.7
4686 He II 25.7 40.5 23.0 28
4711 [Ar IV] 4.89 5.95 4.0 4.9
4724 [Ne IV] 0.0493     0.049
4725 [Ne IV] 0.0407     0.041
4740 [Ar IV] 4.52 5.29 3.58 4.5
4861 H 100 100 100 100
5007 [O III] 1280 1205 1260 1260
5517 [Cl III] 0.317 0.26   0.30
5538 [Cl III] 0.277 0.25   0.27
5755 [N II] 0.0634   0.065 0.064
5876 He I 11.6 10.3 9.2 11.0
6312 [S III] 0.631 0.53 0.53 0.56
6563 H 285   282  
6584 [N II] 2.63 1.51 3.48 2.6
6717 [S II] 0.278 0.24   0.27
6731 [S II] 0.392 0.26   0.39
7005 [Ar V] 0.0835   0.063 0.080
7135 [Ar III] 6.99   6.92 6.96
7263 [Ar IV] 0.124   0.11 0.19:
8045 [Cl IV]     0.41 0.41
C   0.10 0.10 0.14  
$^{\dagger}$ References; (1) Tsamis et al. (2003); (2) Krabbe et al. (2006); (3) Aller & Czyzak (1979).
: Indicates uncertain values.
$^{\ast}$ This is a blend of $\lambda $3726 and $\lambda $3729 lines.
C is the extinction.

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