VLBI images of J1017+6116 observed at various dates and frequencies: S band (2 GHz), X band (5 GHz), and C band (8 GHz), as labeled. The axis units are milliarcseconds to give the spatial extension of the regions. The grayscale ellipses represent the estimated PSF. The dark green, blue, and magenta contour lines indicate specific flux density levels for the S, X, and C bands, calculated as multiples of the standard deviation (3 × [1,  2,  4,  8,  16,  32,  64]) above the mean background level.