File:Kruckeretal2008.jpg
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Images taken during the flare on January 20, 2005 at the peak time at 06:43:32 to 06:46:40 UTC (left), and during the decay phase at 06:50:00 to 06:55:01 UTC (right). Both figures show a TRACE 1,600Å image taken at 06:45:11 UTC overplotted with 12–15 keV (red) and 250–500 keV (blue) contours. The 12–15 keV image is reconstructed using a MEM algorithm and the contour levels shown are at 30, 50, 70, 90% of the maximum, while the Clean algorithm is used for the reconstruction of 250–500 keV images and 50, 70, 90% contours are displayed. During the peak the gamma-ray emission comes from footpoints, while later an additional coronal source becomes visible (from Krucker et al. 2008)
Krucker S, Hurford GJ,MacKinnon AL, Shih AY, Lin RP (2008) Coronal γ -ray Bremsstrahlung from solar flare-accelerated electrons. ApJL 678:L63–L66, doi:10.1086/588381
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