Four New Fast Radio Bursts Discovered in the Parkes 70-cm Pulsar Survey Archive

Abstract

We present four new fast radio bursts discovered in a search of the Parkes 70-cm pulsar survey data archive for dispersed single pulses and bursts. We searched dispersion measures (DMs) ranging between 0 to 5000 pc cm${}^{-3}$ with the HEIMDALL and FETCH detection and classification algorithms. All four of the FRBs discovered have significantly larger widths ($>50$ ms) than almost all of the FRBs detected and cataloged to date. The large pulse widths are not dominated by interstellar scattering or dispersive smearing within channels. One of the FRBs has a DM of 3338 pc cm${}^3$, the largest measured for any FRB to date. These are also the first FRBs detected by any radio telescope so far, predating the Lorimer Burst by almost a decade. Our results suggest that pulsar survey archives remain important sources of previously undetected FRBs and that searches for FRBs on time scales extending beyond $\sim 100$ ms may reveal the presence of a larger population of wide-pulse FRBs.

Accepted for publication in MNRAS

References in corpus (13)

• A bright millisecond radio burst of extragalactic origin
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• A census of baryons in the Universe from localized fast radio bursts
• Fast Radio Bursts
• The First CHIME/FRB Fast Radio Burst Catalog
• Probing Galactic Halos with Fast Radio Bursts
• LOFAR Detection of 110-188 MHz Emission and Frequency-Dependent Activity from FRB 20180916B
• Fast radio bursts: search sensitivities and completeness
• The z-DM distribution of fast radio bursts
• The Thousand-Pulsar-Array programme on MeerKAT -- V. Scattering analysis of single-component pulsars
• Search for Fast Radio Bursts in the Direction of the Galaxies M31 and M33
• 81 New Candidate Fast Radio Bursts in Parkes Archive
• Parkes transient events: I. Database of single pulses, initial results and missing FRBs

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