GBT24B-114

Monitoring the active repeater FRB 20230607A

Abstract

FRB 200230607A was discovered by CHIME. Over the past four months, FAST has conducted 15 subsequent observations of this source, Remarkably, nearly all observation segments detected
pulse signals, making FRB 20230607A well-suited for monitoring. Interestingly, the vast majority
of bursts detected in the 1.0 to 1.5 GHz range showed no evidence of linear polarization. Only linear polarizations were detected during two intense bursts with
polarization degrees of approximately 3% and 20%, respectively. The RM successfully measured
for these two bursts were approximately -12252 rad/m^2. These observations revealed a complex local environment of this source. Moreover, this source is highly likely associated with Persistent Radio Sources (PRS). Here we request 5 sessions of 2 hours with GBT using its C-band receiver, distributed over 1-2 weeks. Anticipated observation over 10 hours is expected to detect approximately 60 bursts, providing ample data for the analysis of its burst rate, energy, RM, and RM scattering. By combing the proposed GBT observation with our FAST programs, we will also carry out the first study of wide-band emission properties of this unique source, which will further improve our understanding of the relation between FRB properties and their environment.

Investigators

Name	Institution
Ryan Lynch	Green Bank Observatory
Jintao Xie	Xinjiang Astronomical Observatory, CAS
Chenhui Niu	National Astronomical Observatories, CAS
Di Li	National Astronomical Observatories, CAS; Space Science Institute
Pei Wang	National Astronomical Observatories, CAS
Yongkun Zhang	National Astronomical Observatories, CAS
Yi Feng *	National Astronomical Observatories, CAS

* indicates the PI