Fig. 1.
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Example of the radial gradients of O/H (upper panel) and N/O (lower panel) in the MaNGA galaxy 1-48157 using data from data cube 10001-12701. Grey points are values in each spaxel, derived from the empirical R calibration of Pilyugin & Grebel (2016). Red crosses are median values in bins. A solid line is the linear fit to the data.
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