Panels (A)–(D) show the Stokes I, Q, U, and V spectra, respectively, along a single slit position for the 2025 August 8 cavity, based on the purple line through the cavity at 15″ in scanning direction, as shown in Figure 3(A). The cyan lines represent a single location on the slit (at 55″ along the slit), as shown in Panels (E)–(H), which include the corrected observed (black) and fitted (red) Stokes I, Q, U, and V profiles, respectively. Panel (E) includes the Gaussian profile for the coronal line emission (green). We indicate the line center as the vertical gray dashed lines.