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    A deep search for prompt radio emission from the short GRB 150424A with the Murchison Widefield Array

    235440_235440.pdf (2.864Mb)
    Access Status
    Open access
    Authors
    Kaplan, D.
    Rowlinson, A.
    Bannister, K.
    Bell, M.
    Croft, S.
    Murphy, T.
    Tingay, Steven
    Wayth, Randall
    Williams, A.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kaplan, D. and Rowlinson, A. and Bannister, K. and Bell, M. and Croft, S. and Murphy, T. and Tingay, S. et al. 2015. A deep search for prompt radio emission from the short GRB 150424A with the Murchison Widefield Array. Astrophysical Journal Letters. 814: L25.
    Source Title
    Astrophysical Journal Letters
    DOI
    10.1088/2041-8205/814/2/L25
    ISSN
    2041-8205
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    Copyright © 2015 The American Astronomical Society

    URI
    http://hdl.handle.net/20.500.11937/47064
    Collection
    • Curtin Research Publications
    Abstract

    © 2015. The American Astronomical Society. All rights reserved. We present a search for prompt radio emission associated with the short-duration gamma-ray burst (GRB) 150424A using the Murchison Widefield Array (MWA) at frequencies from 80 to 133 MHz. Our observations span delays of 23 s-30 minutes after the GRB, corresponding to dispersion measures of 100-7700 pc cm-3. We see no excess flux in images with timescales of 4 s, 2 minutes, or 30 minutes and set a 3ó flux density limit of 3.0 Jy at 132 MHz on the shortest timescales: some of the most stringent limits to date on prompt radio emission from any type of GRB. We use these limits to constrain a number of proposed models for coherent emission from shortduration GRBs, although we show that our limits are not particularly constraining for fast radio bursts because of reduced sensitivity for this pointing. Finally, we discuss the prospects for using the MWA to search for prompt radio emission from gravitational wave (GW) transients and find that while the flux density and luminosity limits are likely to be very constraining, the latency of the GW alert may limit the robustness of any conclusions.

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