Brightest, hottest and shortest-duration X-ray Superflare ever observed on CC Eri using Swift

The flare F1 triggered Swift’s Burst Alert Telescope (BAT) on 2008 October 16 UT 11:22:52 (=T01) during a preplanned spacecraft slew. X-ray telescope (XRT) started observing this object from T01+147.2 second. Temporal binning for BAT light curve is 50, whereas the binning for XRT light curves is 10 s. Dashed vertical lines indicate the trigger time, whereas dotted vertical lines show the time intervals for which time-resolved spectroscopy was performed. The time intervals are represented by Pi, where i=1–11 for flare F1.

[Image Credit: Karmakar et al. (2017)]