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Fig. 1

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Representative PPAK V500 (main window) and V1200 (inset window) gratings optical spectra for H ii region UGC 12494-001. The brightest optical emission lines of the CALIFA V500 spectral range are labeled. In the inset window a section of V1200 spectrum around the [O iii] λ 4363 line (used to compute the electron temperature) is shown. For both gratings the fluxes are in units of 10-16 erg cm-2 s-1.

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