NVSS J151020-352803. Top: spectra extracted from the two Lyα  regions (shown as the black circles in the narrow band images in the 10”×10” insets). Middle: on the left is shown the Lyα  image extracted from the spectral region shown in the inset with superposed radio contours. The black contours mark the 2σ flux limits, and the blue cross is the point from which the brightness profile is extracted. On the right is shown the surface brightness profile. Bottom: Voronoi-tessellated maps of velocity and FWHM of the Lyα  line.