Fig. 2a and b. Direct images of NGC 1084. The dash contour shows the "spur" region (see text). a   image from FPI-data. White crosses mark the locations of SN 1996an and SN 1998dl. The rectangular region corresponds to the field displayed in Fig. 5 and Fig. 7. Contours of the velocity field are superposed. Labels indicate the velocity values in . b  I-band image obtained at the 1m telescope.