offsets. This also helps to maximize the signal-to-noise ratios of the fainter lines.

Removal of nuclear broad line emission {#ssec:blrremoval}
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Six of the galaxies presented here have bright broad H$\alpha$ line emission from the AGN [@nesvadba11a], a seventh with lower radio power was found by @collet14b. To analyze the extended emission-line regions of these galaxies, it was necessary to remove the nuclear component first. This is not an easy task, because the broad and narrow-line profiles are often not very well approximated by Gaussian line profiles, and therefore, fitting the spectra of a galaxy with multiple Gaussians corresponding to the broad and narrow lines often leads to significant residuals. Several approaches have been proposed in the literature [e.g., @christensen06; @canodiaz12], but all leave large residuals, which is why we developed another method.

Rather than simply approximating the full BLR profile with a Gaussian, we only use a Gaussian fit to interpolate the observed spectrum at the wavelengths covered by the narrow emission lines, and construct a hybrid BLR profile in which the intrinsic line profile along the wings is not changed. We subtract this hybrid BLR line profile from all spatial pixels contaminated by BLR emission, after scaling the 