The SUrvey for Pulsars and Extragalactic Radio Bursts II: New FRB discoveries and their follow-up

The ANTARES Collaboration, Michael Kramer, Benjamin Stappers, S. P. Littlefair, Mitchell Mickaliger, Thomas Muxlow

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report the discovery of four Fast Radio Bursts (FRBs) in the ongoing SUrvey for Pulsars and Extragalactic Radio Bursts (SUPERB) at the Parkes Radio Telescope: FRBs 150610, 151206, 151230 and 160102. Our real-time discoveries have enabled us to conduct extensive, rapid multi-messenger follow-up at 12 major facilities sensitive to radio, optical, X-ray, gamma-ray photons and neutrinos on time scales ranging from an hour to a few months post-burst. No counterparts to the FRBs were found and we provide upper limits on afterglow luminosities. None of the FRBs were seen to repeat. Formal fits to all FRBs show hints of scattering while their intrinsic widths are unresolved in time. FRB 151206 is at low Galactic latitude, FRB 151230 shows a sharp spectral cutoff, and FRB 160102 has the highest dispersion measure (DM = $2596.1\pm0.3$ pc cm$^{-3}$) detected to date. Three of the FRBs have high dispersion measures (DM >$1500$ pc cm$^{-3}$), favouring a scenario where the DM is dominated by contributions from the Intergalactic Medium. The slope of the Parkes FRB source counts distribution with fluences $>2$ Jyms is $\alpha=-2.2^{+0.6}_{-1.2}$ and still consistent with a Euclidean distribution ($\alpha=-3/2$). We also find that the all-sky rate is $1.7^{+1.5}_{-0.9}\times10^3$FRBs/($4\pi$ sr)/day above $\sim2$ Jyms and there is currently no strong evidence for a latitude-dependent FRB sky-rate.
    Original languageEnglish
    Article numberstx3074
    Pages (from-to)1427-1446
    Number of pages20
    JournalMonthly Notices of the Royal Astronomical Society
    Volume475
    Issue number2
    Early online date27 Nov 2017
    DOIs
    Publication statusPublished - 1 Apr 2018

    Keywords

    • surveys
    • radiation mechanisms: general
    • intergalactic medium
    • adio continuum: general
    • methods: observational
    • methods: data analysis
    • Surveys
    • Radio continuum: General
    • Intergalactic medium
    • Radiation mechanisms: General
    • Methods: Data analysis
    • Methods: Observational

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