HST NICMOS image of Paα (in units of 10^-21 W cm^-2) of the nucleus of NGC 4945 (Marconi et al. 2000). The contours not corrected for extinction (labelled in units of 10^-12 W cm^-2 sr^-1) are the fine-structure lines [Ne II] 12.81 μm (top panel) and [Ne V] 14.32 μm (middle panel). The [Ne V] flux peaks at about one pixel to the northwest of the H₂O mega maser (Fig. 5), The bottom panel shows the [Ne III] 15.55/[Ne II] 12.81 μm line ratio not corrected for extinction.