Table 2: Visual spectrum of NGC 6826 (intensities with respect to H$\beta $ = 100).
$\lambda $ ($\mu $m) Ident. Meas. Intens. Unred. Intens.
3726 [O II] 14.3 14.9
3729 [O II] 9.74 10.1
3869 [Ne III] 47.6 49.2
4069 [S II] 0.137 0.141
4076 [S II] 0.171 0.175
4102 H$_{\delta}$ 25.2 25.9
4162 [K V]   0.005
4267 C II 0.562 0.574
4340 H$\gamma$ 46.0 46.8
4363 [O III] 3.67 3.74
4471 He I 5.12 5.19
4740 [Ar IV]   0.359
4861 H$\beta $ 100 100
5007 [O III] 756. 753
5518 [Cl II] 0.439: 0.429
5538 [Cl II] 0.400 0.391
5755 [N II] 0.154 0.150
5876 He I 14.8 14.3
6102 [K IV]   0.013
6312 [S III] 0.63 0.60
6563 H$\alpha$ 290. 277.
6584 [N II] 9.22 8.79
6717 [S II] 0.448 0.426
6731 [S II] 0.612 0.582
7136 [Ar III] 12.2 11.5
7320 [O II] 0.98 0.92
7330 [O II] 0.814 0.765
7531 [Cl IV] 0.043 0.041
9531 [S III]   28.9*
$\textstyle \parbox{7cm}{$^{*}$\space Hippelein \& Munch (\cite{hipp}).}$

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