NED object is NGC 4374; Reference is 1981ApJ...247L..57J

   FIG 2. Low-resolution VLA map of the extended radio emission associated with
 NGC 4374 (M84, 3C 272.1) at 6 cm. Contour levels are at -2.5, -1.25, 1.25,
 2.5, 5, 10, 20, 40, and 80 per cent of maximum, which equals 0.149 Jy
 beam**(-1).