Flare 1 RHESSI imaging. Columns left to right: RHESSI 6–12 keV, 20–30 keV, and 50–100 keV images. Rows show different imaging algorithms, top to bottom: Pixon, CLEAN (CLEAN beamwidth = 2.2), VIS_FWDFIT, and MEM_NJIT. Column 1 shows a white contour of the looptop, defined as the 50% contour of the 6–12 keV emission. The white contours in Columns 2 and 3 highlight footpoints, defined as the 50% contour of the 50–100 keV emission.