Fig. 8
Examples from the evolution of the Hα line after subtracting a PHOENIX spectrum in the first hour of observations, covering the main flare. Blue: spectrum at 2:13 UT (first spectrum taken), green: spectrum at 2:48 UT; red: spectrum at 2:58 UT (flare onset); black: spectrum at 3:05 UT. The additional flux in the black spectrum (best seen at about 6557 and 6570 Å) is caused by the broad line component.
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