摘要
Fast Radio Bursts(FRBs) are enigmatic millisecond-duration radio transients of extra-galactic origin, whose underlying mechanisms and progenitors remain poorly understood. FRBs are broadly classified into two categories: repeating FRBs, which emit multiple bursts over time, and one-off FRBs, which are detected as single events. A central question in FRB research is whether these two classes share a common origin. In this study, we present observations of FRB 20240114A, a repeating FRB that entered a hyperactive phase in 2024 January. We conducted a 318 hr monitoring campaign using the Kunming 40-Meter Radio Telescope(KM40M) in the S-band(2.187–2.311 GHz), during which we detected eight radio bursts. We analyzed their properties, including dispersion measure, bandwidth, pulse width, flux, fluence, and energy. Additionally, we searched for counterparts in overlapping data from the Five-hundred-meter Aperture Spherical Telescope(FAST) in the L-band(1.0–1.5 GHz). While no bursts were temporally aligned between the two telescopes, we identified one FAST burst that arrived approximately 6 ms after one of the KM40M bursts. The absence of FAST counterparts for the KM40M bursts suggests that individual bursts from FRB 20240114A are likely narrow-band, with fractional bandwidths less than 10%. By comparing the cumulative event rates from KM40M and FAST observations, we found that the two measurements are compatible, indicating a possible flattening of the event rate at higher energies. This feature aligns with observations of one-off FRBs, supporting the hypothesis that repeating and oneoff FRBs may share a common origin.
基金
supported by the National SKA Program of China (grant No. 2020SKA0120100)
the Special Project of Foreign Science and Technology Cooperation, Yunnan Provincial Science and Technology Department (grant No. 202003AD150010)
the National Key R&D Program of China (grant No. 2022YFC2205203)
the National Natural Science Foundation of China (NSFC, grant Nos. 12073076, 12173087, 12041303, and 12063003)
the CAS “Western Light Youth Project,” Yunnan Fundamental Research Projects (grant Nos. 202401AT070144 and 202505AO120021)
funding from the Max-Planck Partner Group
support from the XPLORER PRIZE
