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

Kaplan, DL; Rowlinson, A; Bannister, KW; Bell, ME; Croft, SD; Murphy, T; Tingay, SJ; Wayth, RB; Williams, A

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

Kaplan, DL Rowlinson, A Bannister, KW Bell, ME

Croft, SD Murphy, T Tingay, SJ Wayth, RB Williams, A

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Publication Type:: Journal Article
Citation:: Astrophysical Journal Letters, 2015, 814 (2)
Issue Date:: 2015-12-01

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Field	Value	Language
dc.contributor.author	Kaplan, DL	en_US
dc.contributor.author	Rowlinson, A	en_US
dc.contributor.author	Bannister, KW	en_US
dc.contributor.author	Bell, ME https://orcid.org/0000-0003-1767-5277	en_US
dc.contributor.author	Croft, SD	en_US
dc.contributor.author	Murphy, T	en_US
dc.contributor.author	Tingay, SJ	en_US
dc.contributor.author	Wayth, RB	en_US
dc.contributor.author	Williams, A	en_US
dc.date.issued	2015-12-01	en_US
dc.identifier.citation	Astrophysical Journal Letters, 2015, 814 (2)	en_US
dc.identifier.issn	2041-8205	en_US
dc.identifier.uri	http://hdl.handle.net/10453/113504
dc.description.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.	en_US
dc.relation.ispartof	Astrophysical Journal Letters	en_US
dc.relation.isbasedon	10.1088/2041-8205/814/2/L25	en_US
dc.subject.classification	Astronomy & Astrophysics	en_US
dc.title	A deep search for prompt radio emission from the short GRB 150424A with the Murchison Widefield Array	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	814	en_US
utslib.for	0201 Astronomical and Space Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	814	en_US

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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http://hdl.handle.net/10453/113504