Comparison of the spectra of the two nuclear line knots (top panels: for the nucleus of the radio galaxy, N1, bottom panels: for the putative QSO2, N2) extracted from a squared synthetic aperture of side 0″.6. Wavelengths are shown in observed frame. In the spectra are visible the Hβ and [O III] doublet on the left and [O I] , the [N II] +Hα complex, and the [S II] doublet on the right.
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