NED object is NGC 3169; Reference is 1987A&AS...70..517H

   Figure 1. - Contour maps of nuclei that show a more complex structure of
 their radio continuum emission. The parameters relevant to these maps are
 given in table II. The optical positions are indicated by a cross. NGC 3169
 Contours plotted (mJy per beam) -0.3, 0.3, 0.6, 0.9, 1.5, ..., 4.5 steps of
 0.5 HPBW (arcsec) 1.4x1.2 (-12*) r.m.s. noise (mJy per beam) 0.18.