Results from the 43 GHz stacked image. Left panel: image created using four different epochs, each restored with a common circular beam. Right panel: jet width (d) as a function of the de-projected distance from the core (z), based on the analysis of the super-resolved stacked image. The minimum jet width, observed at 0.008 ± 0.008 pc = 41 ±  41 R_S, may pinpoint the position of the black hole.