Brightest FRB traced to nearby galaxy, reshaping FRB origins

Astronomers localized FRB 20250316A (RBFLOAT), the brightest fast radio burst to date, to a region in the nearby spiral galaxy NGC 4141 using the CHIME/FRB Outrigger VLBI network. JWST follow-up detected a faint infrared signal at the same location. The burst did not repeat in hundreds of hours of CHIME data, challenging the idea that all FRBs are repeaters and offering new constraints on their origins.