[FeII] dynamics as derived from single- and double-Gaussian fits. All slices with constant wavelength of the datacube were convolved with a Gaussian seeing disk with a FWHM of 0.07 arcsec. The cross denotes the position of the continuum peak. Mayor tick marks in the velocity and dispersion fields correspond to 0.50 arcsec. Letters A to D mark positions from which the spectra shown in the last row were extracted. The black line indicates the position angle of the bicone of 60°. Top: centroid velocities from single-Gaussian fits, VS (left), high/low velocity component from double-Gaussian fits, VH/VL (middle/right). The contours in the middle image in this row represent the 21 cm radio continuum contours (Mundell et al. 2003) at levels of .5, 1, 2, and 4 mJy beam^-1 with a beam size about four times smaller than our angular sampling. Middle left and middle: Gausian dispersions of the single- and double-Gaussian fits (σS and σH). Middle right: Centroid velocity of our fits as a function of distance from the continuum peak along the NLR at a position angle of 60°. Black/red/blue points represent the centroid velocities derived from single-Gaussian fits and high- and low-velocity components in case of double-Gaussian fits. Bottom: [FeII] line profiles extracted from various regions with Gaussian fits overplotted. Measured line profile in black, single-Gaussian fits in green, combined double-Gaussian fits in yellow, the low/high velocity component of the double-Gaussian fit in red/blue.