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Evidence for a brief appearance of gamma-ray periodicity after a compact star merger

A coherent 909-Hz quasi-periodic oscillation was potentially detected in GRB 230307A, the second brightest gamma-ray burst to date, indicating that a millisecond magnetar formed after the merger powered the burst.

Run-Chao Chen
Bin-Bin Zhang
Bing Zhang
Research19 Sept 2025
Nature Astronomy

P: 1-13

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Evidence for a brief appearance of gamma-ray periodicity after a compact star merger

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