Research Article

On the Onset Time of Several SPE/GLE Events: Indications from High-Energy Gamma-Ray and Neutron Measurements by CORONAS-F

Figure 1

Time profiles of selected emissions from the August 25, 2001, flare: (a) soft X-ray flux (hereinafter black curve and right -axis) and its derivative (hereinafter red curve and left -axis); (b) hard X-ray 40–100 keV from CORONAS-F/SPR-N; (c) gamma-rays 0.5–1.3 MeV (CORONAS-F/SONG, black curve, left -axis) and 0.27–1.04 MeV (Yohkoh/GRS, blue curve, right -axis; http://solar.physics.montana.edu/sxt/); (d) gamma-rays >60 MeV (red, left -axis) and neutrons (black, right -axis) from CORONAS-F/SONG. Shaded rectangle in bottom panel denotes hereinafter the interval of undoubted observation of the pion-decay gamma-emission.
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