NED object is NGC 3887; Reference is 1985A&AS...60..293H

    Fig. 1f. NGC3887 Contours plotted (mJy per beam) -0.4 to 1.6 in steps of
 0.4 -- HPBW (arcsec) 18 x 12 (7deg) -- r.m.s. noise (mJy per beam) 0.17 -- kpc
 per arcmin 3.9.