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Burns, Eric; Svinkin, Dmitry; Fenimore, Edward; Kann, D. Alexander; Agüí Fernández, José Feliciano; Frederiks, Dmitry; Hamburg, Rachel; Lesage, Stephen; Temiraev, Yuri; Tsvetkova, Anastasia; Bissaldi, Elisabetta; Briggs, Michael S.; Dalessi, Sarah; Dunwoody, Rachel; Fletcher, Cori; Goldstein, Adam; Hui, C. Michelle; Hristov, Boyan A.; Kocevski, Daniel; Lysenko, Alexandra L.; Mailyan, Bagrat; Mangan, Joseph; McBreen, Sheila; Racusin, Judith; Ridnaia, Anna; Roberts, Oliver J.; Ulanov, Mikhail; Veres, Peter; Wilson-Hodge, Colleen A.; Wood, Joshua
Astrophysical journal. Letters, 03/2023, Volume: 946, Issue: 1Journal Article
Abstract GRB 221009A has been referred to as the brightest of all time (BOAT). We investigate the veracity of this statement by comparing it with a half century of prompt gamma-ray burst observations. This burst is the brightest ever detected by the measures of peak flux and fluence. Unexpectedly, GRB 221009A has the highest isotropic-equivalent total energy ever identified, while the peak luminosity is at the ∼99th percentile of the known distribution. We explore how such a burst can be powered and discuss potential implications for ultralong and high-redshift gamma-ray bursts. By geometric extrapolation of the total fluence and peak flux distributions, GRB 221009A appears to be a once-in-10,000-year event. Thus, it is almost certainly not the BOAT over all of cosmic history; it may be the brightest gamma-ray burst since human civilization began.
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