Left: velocity map of Hα as derived from a Gaussian fit of the emission line. As systemic velocity we have chosen 2841 km s^-1. Overplotted are the contours of the Lyα-continuum subtracted emission (Östlin et al. 2009) with contour levels of 0.3, 0.9 and 2 × 10^-19 erg/s/cm²/Å. Right: [S ii]/[O iii] line ratio tracing the ionization parameter throughout the galaxy (Pellegrini et al. 2012). All cells with a flux lower than 1.7 × 10^-19 erg/s/cm²/Å, corresponding to a S/N = 20 for the S ii λ6717 Å line, have been removed from the plot. The contours show the Hα velocity map with contours at −15 (dashed), 15, 30, and 45 (solid) km s^-1.