So we check the microwave source hoping to see a somewhat different result. In this case we are not doing full imaging, and use a more fundamental relationship between the observed phase of the visibility and the source position on the sky. At the time of flare, the OVSA array looked up the sun in a way that the baseline of this combination has spatial resolution along the red line shown here, while the N-S baseline combination has direction along the blue line.  The top panel here shows that a sudden large change occurred in the phase at the time of flare, later comes back to the original position to some extent. Thus indicates a large loop source, a source centered high above the surface/limb by 80 arcsec. So we premise a large loop acting as a trap. Together with the previous HXR images we interpret that the whole system is like a trap-plus-precipitation, like the next famous figure by Aschwanden.