RHESSI images in 3 of the 20 energy bins used for imaging spectroscopy, integrated between 23:49:30 and 23:50:30 UT with 50% of the maximum value encircled in red. Source lengths and widths are shown with green and blue arrows, respectively. At 10–12 keV, the X-ray emission is thermal and we therefore show the length and width of the thermal source L_th and W_th. At 26–28 keV, the emission is non-thermal and we therefore show the length and width of the non-thermal looptop source L_LT and W_LT. At 60–75 keV, the area of the footpoint sources is calculated with the 50% contour in red.