Parkes observations for project P1183 semester 2026APRS_04

After nearly four years of monitoring with both the Parkes and FAST telescopes, FRB 20220529 has been established as an extremely active repeater. It exhibits one of the longest known activity durations and shows evidence for a potential periodicity. Owing to the frequent observations carried out with Parkes and FAST, two abrupt rotation-measure (RM) flares have been detected in this source. These constitute the first RM flares ever observed in a fast radio burst (FRB), indicating that a dense, magnetised plasma clump passed across the line of sight. The second RM flare in particular makes a binary-origin scenario for FRB 20220529 especially compelling. If confirmed, the periodicity and RM flares would mutually reinforce one another, serving as a smoking gun for a binary origin. Previous analyses have shown that observations from both Parkes and FAST are essential. FAST's exceptional sensitivity enables the detection of many bursts, whereas the Parkes UWL receiver provides a stable burst-detection rate even during low-activity phases. To further investigate FRB 20220529, we have scheduled regular FAST observations every fortnight. We therefore propose to continue monitoring FRB 20220529 with the Parkes UWL receiver as well. The FAST and Parkes sessions are expected to be separated by a few days, ideally about one week. A cadence of approximately one week offers an excellent opportunity to capture detailed structure during the onset of RM decreases, as demonstrated by previous monitoring.