NED object is MKN 0003; Reference is 1984MNRAS.207..193P

   Figure 2. The 18-cm map of the nucleus of Mkn 3 produced by MERLIN. The
 angular resolution is 0.25 arcsec (FWHM). Contour levels are at - 0.3, 0.3 and
 0.6 per cent and then at intervals of 1 per cent up to 18 per cent of the peak
 brightness which is 440.2mJy per beam. The arrow shows the PA of the
 forbidden-line polarization as measured by Thompson et al. (1980).