2D spectroastrometric map for the Brγ line. The red point marks the inferred position of the point-like mass. The red solid line represents the line of nodes of the disk obtained from a linear fit to the HV points, as described in the text. The dotted red lines represent the 1σ uncertainties on the position angle of line of nodes. The origin of the map is the position on the sky plane of the PA1 slit center (which corresponds to the continuum peak position).
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