NED object is NGC 3077; 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 3077
 Contours plotted (mJy per beam) -0.2, 0.2, 0.4, 0.6, 0.8, ..., 2.8 steps of
 0.4 HPBW (arcsec) 1.3x1.0 (25*) r.m.s. noise (mJy per beam) 0.12.