Radial profiles of continuum intensity (I_c, b), magnetic field inclination (γ, c), total magnetic field strength (B_tot, d), vertical magnetic field strength (B_ver, e), and horizontal magnetic field strength (B_hor, f). The continuum intensity map of the observed sunspot with contours marking relative radial positions from 0.1 to 1 is shown in panel a. The solid vertical lines mark the UP boundaries, the dashed vertical lines mark the boundary between penumbra and quiet Sun. The horizontal lines in panels b and e mark the and 1876 G, respectively.