Detection limits in Jupiter mass as a function of the distance to the star along the semi-minor axis of the disc. The blue curves correspond to the NW ansa and the green curve to the SE ansa.The dotted lines show the mass distance relationship of a planet shaping the edge of the disc. The shaded area represents the region in the (M_pl, a_pl) parameter space compatible with a planet shepherding the disc, given the sensitivity of our new measurements along the semi-minor axis.