Fig. 22.
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Maps of total oxygen abundance derived by means of different strong line methods. Upper row: calibrations by Marino et al. (2013) for the N2 (left) and the O3N2 (right) methods. Middle row: calibrations by Stasińska (2006) for the S3O3 (left) and Ar3O3 (right) methods. Lower row: S calibration by Pilyugin & Grebel (2016) (left) and N2S2 calibration by Dopita et al. (2016) (right).
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