Parametric images of the August 26, 2021 event obtained by applying VIS_FWDFIT (left column) and VIS_FWDFIT_PSO (right columns) on STIX observations. First row: contour level of the thermal (red) and non-thermal (blue) components superimposed onto the rotated AIA map (the 50% contour level of the AIA image is plotted in green). Second row: parametric images of the thermal component with the map-center shifted of |Δx|=|Δy| = 10 arcsec. Third row: same as the second row, but for the case of the non-thermal component.