Radio and Hard X-Ray Images of High-Energy Electrons in an X-Class Solar Flare

We present the first comparison between radio images of high--energy electronsaccelerated by a solar flare and images of hard X--rays produced by the same electronsat photon energies above 100 keV. The images indicate that the high--energy X--raysoriginate at the footpoints of the loops dominating the radio emission. The radio andhard X--ray light curves match each other well and are quantitatively consistent with anorigin in a single population of nonthermal electrons with a power...