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The first observed stellar X-ray flare oscillation: Constraints on the flare loop length and the magnetic field
We present the first X-ray observation of an oscillation during a stellar flare. The flare occurred on the active M-type dwarf AT Mic and was observed with XMM-Newton. The soft X-ray light curve (0.2–12 keV) is investigated with wavelet analysis. The flare's extended, flat peak shows clear evidence for a …