A bright burst from FRB 20200120E in a globular cluster of the nearby galaxy M81
Fast radio bursts (FRBs) are immensely energetic millisecond-duration radio pulses. Observations indicate that nearby FRBs can be produced by old stellar populations, as suggested by the localization of the repeating source FRB 20200120E in a globular cluster of M81. Nevertheless, the burst energies...
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Zusammenfassung: | Fast radio bursts (FRBs) are immensely energetic millisecond-duration radio
pulses. Observations indicate that nearby FRBs can be produced by old stellar
populations, as suggested by the localization of the repeating source FRB
20200120E in a globular cluster of M81. Nevertheless, the burst energies of FRB
20200120E are significantly smaller than those of other cosmological FRBs, even
falling below the energy of the Galactic event FRB 20200428. Here, we report
the detection of a bright burst from FRB 20200120E in 1.1 -- 1.7 GHz, with a
fluence of about 30 Jy ms, which is more than 42 times larger than the
previously detected bursts near 1.4 GHz frequency. It reaches one-third of the
energy of the weakest burst from FRB 20121102A and is detectable at a distance
exceeding 200 Mpc. Our finding bridges the gap between nearby and cosmological
FRBs and indicates that FRBs hosted in globular clusters can be bright enough
to be observable at cosmological distances. |
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DOI: | 10.48550/arxiv.2310.00908 |