Observational radio survey reports 12 candidate fast radio bursts from Galactic magnetar SGR 1935+2154, highlighting the efficacy of continuous real-time transient monitoring.
Key Points
Introduce the Long-Integration Magnetar Burst Observatory (LIMBO) real-time pipeline and constrain fast radio burst event rates from Galactic magnetar SGR 1935+2154.
Deployed a 4.3-m dish with a dual-polarization feed to continuously monitor a 125 MHz effective band centered at 1460 MHz with sensitivity to fluences ≳ 43 Jy·ms.
Conducted 833 hours of targeted follow-up observations of magnetar SGR 1935+2154 between May and August 2023 using automated real-time transient search algorithms.
Identified 12 candidate fast radio burst events from SGR 1935+2154 during the 833-hour monitoring campaign.
Constrained burst event rates to R(≥ 65 Jy·ms) = 112.3 (+81.3/-54.5) per year and R(≥ 130 Jy·ms) = 17.7 (+40.8/-15.1) per year.
Derived a cumulative rate–fluence power-law slope of α = -0.60 (+0.24/-0.28) across a fluence range of 10 to 10^6 Jy·ms when combining with historical bursts.