ICTS:32961

Wideband study of FRB 20240114A with uGMRT and VLA

(2025). Wideband study of FRB 20240114A with uGMRT and VLA. SciVideos. https://scivideos.org/index.php/icts-tifr/32961

Wideband study of FRB 20240114A with uGMRT and VLA. SciVideos, Oct. 13, 2025, https://scivideos.org/index.php/icts-tifr/32961 

          @misc{ scivideos_ICTS:32961,
            doi = {},
            url = {https://scivideos.org/index.php/icts-tifr/32961},
            author = {},
            keywords = {},
            language = {en},
            title = {Wideband study of FRB 20240114A with uGMRT and VLA},
            publisher = {},
            year = {2025},
            month = {oct},
            note = {ICTS:32961 see, \url{https://scivideos.org/index.php/icts-tifr/32961}}
          }
Ajay Kumar
Talk numberICTS:32961
Source RepositoryICTS-TIFR

Abstract

"FRB 20240114A (R147) is a hyperactive repeating FRB discovered by CHIME/FRB in January 2024. Since its discovery, it has been extensively followed up across the electromagnetic spectrum, including X-ray and optical observations . Several telescopes like FAST, Parkes, Meerkat, etc. have detected hundreds to thousands of bursts from the source. Our uGMRT monitoring campaign (300–1460 MHz) started from 1st February 2024, with our recent study (Kumar et. al. 2024) reporting 60 bursts observed between 300–750 MHz. These bursts exhibit narrow emission bandwidths (~10%) and probe the lower end of the energy distribution. We also observe variations in burst activity, including a coincident burst storm reported by FAST. Preliminary indications suggest possible chromaticity in its burst activity, which, if confirmed, could provide crucial insights into the emission mechanisms of repeating FRBs.
Continued monitoring until March 2025 has yielded in detection of more than 100 additional bursts in Band-4 (550-750 MHz) with uGMRT after entering a quiet phase in August last year. Notably, we recently detected a bright burst in S-band (2–3 GHz) with the VLA on 31st March 2025, following renewed activity reported by the Hyperflash team earlier this year. We have also been observing with VLA across S-band to X-band (2–12 GHz) to study the spectral properties of the potential PRS associated with the FRB source. We will discuss our results, on bursts as well as the PRS, in the context of other recent multi-wavelength observations of FRB 20240114A and its associated candidate PRS, to provide a comprehensive picture of its activity and emission mechanisms."