NED object is Cygnus A; Reference is 1974MNRAS.166..305H

   Fig. 5. The compact features drawn with a contour interval of 2.5 X 10(**4)
 K and vectors showing the position angle (of the electric vector) and
 magnitude of the linearly polarized emission. The vertical line indicates a
 polarized flux of 1 f.u. (a) The Sf component. (b) The Np component. The
 letters indicate the four compact components discussed in the text.