Fig. 1.
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Diagnostic diagram using two line ratios: log([O III]λ5007/Hβ) vs. log([O II]λλ3727/Hβ) for VIPERS (left panel) and SDSS (right panel) samples. Solid lines show classification boundaries proposed by Lamareille (2010), blue points are the SF galaxies, orange points are the LINERs, green points are galaxies in the mix region, and red points are the Seyfert 2.
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