FAST observations of an extremely active episode of FRB 20201124A: II. Energy Distribution

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We report the properties of more than 800 bursts detected from the repeating fast radio burst (FRB) source FRB 20201124A with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during an extremely active episode on UTC September 25-28, 2021 in a series of four papers.

• In this second paper of the series, we mainly focus on the energy distribution of the detected bursts.
• The event rate initially increased exponentially but the source activity stopped within 24 hours after the 4th day.
• The detection of 542 bursts in one hour during the fourth day marked the highest event rate detected from one single FRB source so far.