NED object is MRC 1256-243; Reference is  1998ApJS..118..327K

   MRC 1256-243_8439.9MHz Contour plots from the VLA 4.86 GHz images of
 extended MQS sources. The B1950.0 position corresponding to the center of each
 image is listed below each plot. The contours levels plotted are L x (-2,
 -1.4, -1, 1, 1.4, 2, 2.8, 4, 8, 16, 32...), where the values of L in mJy
 beam**(-1) are listed in Table 2. The size and orientation of the elliptical
 Gaussian restoring beam in each case is listed in Table 2. The optical
 position of the quasar or BK Lac objects is marked with a cross; the size of
 the cross is chosen for convenience and does not reflect the error in the
 optical position.