Abstract
The nature of fast radio bursts (FRBs), which occur on millisecond timescales in the radio band, is well-understood. Among their unknown observational properties are their broadband spectra, and persistent and transient multiwavelength counterparts. Well-localized FRBs provide the opportunity to address these issues in archival observations. We performed searches for 15–150 keV hard X-ray bursts on timescales as short as 1 ms in the direction of the repeating FRB 121102 (with a spacial resolution of a few arcminutes) in the archival ...
