Detection and confirmation of FRB 20240114A hyper-activity with Parkes/Murriyang
ATel #16430; P. A. Uttarkar (Swinburne University of Technology, SUT), P. Kumar (Weizmann Institute of Science), M. E. Lower (CSIRO Space & Astronomy), R. M. Shannon (SUT)
on 5 Feb 2024; 09:44 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Marcus Lower (marcus.lower@csiro.au)
Subjects: Radio, Transient, Fast Radio Burst
We report the detection of five repeat bursts from the FRB 20240114A source using the Parkes/Murriyang Ultra Wideband Low (UWL) receiver system (Hobbs et al. 2020). Following initial reports of its discovery and possible hyper-activity by CHIME/FRB (ATel #16420), we conducted a target-of-opportunity observation between 05:00 and 06:00 UTC on 2 Feb 2024. The search-mode data were recorded at 64 microsecond temporal resolution and 0.5 MHz wide channels covering 3328 MHz bandwidth, with full Stokes polarimetry. The data were searched for FRBs using a Heimdall-FETCH based multi-tiered sub-banded search pipeline to search for single pulses as described in Kumar et al. (2021).
The source appears to have been highly active, with five bursts detected throughout the observation window. The brightest burst had a detection signal-to-noise ratio (S/N) of 72.7. None of the detected bursts show emission above 2 GHz. Preliminary polarimetric analysis of the data using the brute force method in the rmfit tool in the psrchive software package (Hotan et al. 2004) shows this burst to have a rotation measure (RM) of approximately +360 rad/m^2, consistent with the magnitude of the RM reported by ATel #16420.
We thank the Parkes System Scientist for the prompt scheduling of the observation.
References:
Hobbs et al., 2020, PASA, 37, e012
Hotan et al. 2004, PASA, 21, 302
Kumar et al., 2021, MNRAS, 500, 2525
Dynamic spectra of the brightest UWL burst