A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes

TL;DR

This paper reports a simultaneous observation of a narrowband Fast Radio Burst from FRB 20190520B by FAST and Parkes, confirming narrowband features and emphasizing the importance of multi-instrument, multi-band studies for understanding FRB mechanisms.

Contribution

It provides the first detailed analysis of a burst observed simultaneously by FAST and Parkes, confirming narrowband radiation in FRB 20190520B and advancing understanding of FRB spectral properties.

Findings

Confirmed narrowband radiation in FRB 20190520B

Demonstrated simultaneous detection across different instruments

Highlighted the importance of multi-band observations for FRB studies

Abstract

Fast Radio Bursts (FRBs) are short-duration radio transients with mysterious origins. Since its uncertainty, there are very few FRBs that are observed by different instruments, simultaneously. This study presents a detailed analysis of a burst from FRB 20190520B observed by FAST and Parkes at the same time. The spectrum of this individual burst ended at the upper limit of the FAST frequency band and was simultaneously detected by the Parkes telescope in the 1.5-1.8 GHz range. By employing spectral energy distribution (SED) and spectral sharpness methods, we confirmed the presence of narrowband radiation in FRB 20190520B, which is crucial for understanding its radiation mechanisms. Our findings support the narrowband characteristics that most repeaters exhibit. This work also highlights the necessity of continued multiband observations to explore its periodicity and frequency-dependent properties, contributing to an in-depth understanding of FRB phenomena.