Characterization of the Repeating FRB 20220912A with the Allen Telescope Array

• DOI: 10.48550/arxiv.2312.07756
• Publication Date: 2023-01-01
• Authors: Sofia Z. Sheikh; Wael Farah; Alexander W. Pollak; Andrew; Пчелов Евгений В.; Siemion; Mohammed A. Chamma; Luigi F. Cruz; Roy H. Davis; David R. DeBoer; Vishal Gajjar; P. Karn; Jamar Kittling; Wenbin Lu; Mark Masters; Pranav H. Premnath; Sarah Schoultz; Carol Shumaker; Gurmehar Singh; Michael Snodgrass
• Keywords: Center frequency; Fast radio burst

FRB 20220912A is a repeating Fast Radio Burst (FRB) that was discovered in Fall 2022 and remained highly active for several months. We report the detection of 35 FRBs from 541 hours follow-up observations this source using recently refurbished Allen Telescope Array, covering 1344 MHz bandwidth primarily centered at 1572 MHz. All were detected lower half band with non-detections upper covered fluences 4-431 Jy-ms (median$=$48.27 Jy-ms). find consistency previous repeater studies range spectrotemporal features including: bursts downward frequency drifting over time; positive correlation between center frequency; decrease sub-burst duration time. an apparent observed 2 months observing campaign (corresponding to drop $6.21\pm 0.76$ per day). predict cut-off fluence $F_\textrm{max}\lesssim 10^4$ Jy-ms, be consistent all-sky rate, significantly contributed rate level few percent $\sim$100 Jy-ms. Finally, we investigate characteristic timescales periodicities a) median inter-subburst timescale 5.82$\pm$1.16 ms multi-component b) no evidence strict periodicity even most evenly-spaced burst sample. Our results demonstrate importance wideband FRBs, provide important set observational parameters against which compare progenitor emission mechanism models.