Fig. 16.
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Spatial variation of the emission line flux ratio [O III]λ5007/Hβ, [S II]λλ6717, 6731/Hα and [O I]λ6300/Hα. Only spaxels with S/N > 10 in the involved emission lines are plotted. The rightmost panel indicates the spatial distribution of possible excitation sources implied by the [O III]λ5007/Hβ vs. [O I]λ6300/Hα diagnostic diagram.
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