Intrinsic rotation curve of UGC 4503. The inset provides a zoom-in view of the rise in rotational curve within 1.5 kpc. The total circular velocity (V_{circ_tot}) profile is shown as thick blue lines. The black line indicates baryonic matter velocity (V_{circ_bar}) and the gray dashed line means the rotational velocity (V_rot) considering asymmetric drift correction. The baryonic and dark matter contributions to the circular velocity are plotted in light blue and yellow shading respectively and stacked on each other. The dashed vertical gray line displays the effective disk radius (R_eff,disk) of UGC 4503. The red marks locate the rotational velocity at 2 × R_eff,disk.