Projected density profile of Terzan 6 derived from star counts in concentric annuli around C_grav (empty circles). The horizontal dashed line indicates the Galactic field density, which has been subtracted from the observed points (empty circles) to obtain the background-subtracted profile, shown as filled circles. The red solid line represents the best-fit King model to the cluster’s density profile, with the red stripe indicating the ±1σ range of solutions. The vertical lines denote the positions of the core radius (dashed line), half-mass radius (dot-dashed line), and tidal radius (dotted line), with their respective 1σ uncertainties highlighted by gray stripes. The values of the main structural parameters obtained from the fitting process are also labeled (see details in the text).