CBP model corresponding to 201.7 minutes from the start of the Bifrost simulation originally presented in Nóbrega-Siverio et al. (2023), and associated spectral synthesis calculations. Left panel: Magnetic topology of the CBP model (red lines), superimposed on a horizontal map of B_z at z = 0. The red-green-blue coordinate system of the Bifrost model indicates the x, y, z axes. Upper central panel: Synthetic intensity computed with CHIANTI (Dere et al. 2023), mimicking a limb observation by SDO/AIA 193 Å. The rest of the panels correspond to synthetic quantities of Fe10747 line, obtained with P-CORONA. Upper right panel: Wavelength-integrated intensity $\overline{I}$. Lower central panel: Wavelength-integrated absolute-value circular polarization, normalized to the integrated intensity, $\overline{|V|}/\overline{I}$. Lower right panel: Wavelength-integrated linear polarization fraction P_L. The dashed black curves in the upper central and upper right panels indicate the region corresponding to the CBP. The green contour in the lower central panel delineates where the $\overline{|V|}/\overline{I}$ amplitude exceeds 0.1%.