NED object is NGC 4389; Reference is 1985A&AS...60..293H Fig. 1g. NGC4389 Contours plotted (mJy per beam) -2, 2, 4, 6, 8, 10, 15 -- HPBW (arcsec) 28 -- r.m.s. noise (mJy per beam) 0.7 -- kpc per arcmin 2.9.