Table 4: IUE spectrum of M 1-42.
$\lambda $ Ion Intensities
(Å)   (1)$^\dagger$ (2)$^\sharp$ (3)(I/H$\beta $)$^\star$
1640 He II 4.91 8.1 81
1663 O III] 2.89 4.7 47
1863 Al III] 1.71 2.8 28
1909 C III] 2.77 4.56 45.6
$^\dagger$ Measured intensity from low resolution spectra in units of 10-14 erg cm-2 s-1.
$^\sharp$ Intensity corrected for extinction in units of 10-12 erg cm-2 s-1.
$^\star$ Normalized to H$\beta=100$.

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