Fig. 1
Sample of X-ray images obtained on April 14, 2007 at the center of the solar disk in a quiet region. The field of view for both images is 512′′ × 512′′, the left image being taken with the Ti_poly filter at full resolution (512 × 512 pixels), the right image being taken with the Al_mesh filter binned 2 × 2 (256 × 256 pixels). The analysed XBPs are marked as xbp1, xbp2,..., xbp14.
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