NED object is NGC 4278; Reference is  1984ApJ...287...41W

   Fig. 13.- NGC 3998 (1217+295) at 1.5 GHz. The peak total intensity is 482.8
 mJy beam **(-1), the CI is 2 mJy beam **(-1), and contours at -3, -2, -1, 1,
 2, 3, 4, 5, 10, 20, 40, 80, and 160 times this CI are plotted. The map was
 corrected for primary-beam attenuation. The cross marks the position of the
 optical nucleus of the E galaxy NGC 4283.