Fig. 1
The 6–7 keV back-projected RHESSI images reconstructed for selected grids (Nos. 5, 6, 8) and three time intervals (the 30 July 2005 flare). When a source size is comparable to the resolution of a particular grid, the image obtained for this grid is dominated by noise. Field of view of each image is 1024 × 1024 arcsec. The Sun limb is marked be a black line.
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