Two FRBs exhibit microlensing signatures consistent with intermediate-mass black holes of masses approximately 500-600 and 1500-2500 solar masses, interpreted as possible evidence for isolated primordial black holes comprising about 4% of dark matter.
2020a, Nature
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A second coherent radio burst spanning 704-4032 MHz with spectral index -2.18, 54% linear and 22% circular polarization, and an orthogonal polarization angle jump was detected from 2XMM J104608.7-594306, showing rare radio activity in sources thought to be radio-quiet.
No statistically significant excess of associations is found between CHIME FRBs and Swift GRBs after spatial, redshift, and temporal filtering, consistent with random coincidences.
citing papers explorer
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Evidence for Intermediate-Mass Black Holes From Microlensing Signatures in CHIME/FRB catalog 2
Two FRBs exhibit microlensing signatures consistent with intermediate-mass black holes of masses approximately 500-600 and 1500-2500 solar masses, interpreted as possible evidence for isolated primordial black holes comprising about 4% of dark matter.
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A bright wideband radio burst from the isolated neutron star 2XMM J104608.7$-$594306
A second coherent radio burst spanning 704-4032 MHz with spectral index -2.18, 54% linear and 22% circular polarization, and an orthogonal polarization angle jump was detected from 2XMM J104608.7-594306, showing rare radio activity in sources thought to be radio-quiet.
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Searching for Gamma Ray Bursts associated with CHIME Fast Radio bursts
No statistically significant excess of associations is found between CHIME FRBs and Swift GRBs after spatial, redshift, and temporal filtering, consistent with random coincidences.