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Fig. 8.
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BPT diagrams (Baldwin et al. 1981) to assess the activity in J0428−00. The line ratios (panel a) [N II]λ6583/Hα and (panel b) [S II]λ6717/Hα are plotted against the line ratio [O III]λ5007/Hβ. The classification curves are taken from Kewley et al. (2001), Kauffmann et al. (2003), and Schawinski et al. (2007).
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