NED object is NGC 6146; Reference is  1984ApJ...287...41W

   Fig. 19.- NGC 6146(1623+410) at 1.5 GHz. (a) Total intensity. The peak is
 97.9 mJy beam **(-1), the CI is 2.0 per cent of this peak, and contours at -3,
 -2, -1, 1, 2, 3, 4, 5, 10, 15, 20, and 25 times this CI are plotted.