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Nonthermal Hard X‐Ray Emission and Iron Kα Emission from a Superflare on II Pegasi
We report on an X-ray flare detected on the active binary system II Pegasi with the Swift telescope. The event triggered the Burst Alert Telescope (BAT) in the hard X-ray band on 2005 December 16 at 11:21:52 UT with a 10-200 keV luminosity of 2.2 × 1032 ergs s-1—a superflare, …