Spectral fit of the host mean spectrum in the projected 1 kpc radius around SNF20060512-001. Top right: reconstructed image of a final reference exposure. The circle aperture shows the 1 kpc aperture centered on the SN location (central star marker). Top left: mean host spectrum within 1 kpc radius around the SN (rest-frame, green dashed-line with ± 1σ error band), averaged over 21 cubes (including two final references). The best ULySS fit is shown as the sum of a stellar continuum (red line) and gas lines (magenta dashed line). Bottom, from left to right: zoom on [O ii]λλ3726,3728, 4000 Å break, and Hα + [N ii]λλ6548,6584 + [S ii]λλ6716,6731 wavelength regions.