Simultaneous Search for Prompt Radio Emission Associated with the Short GRB 170112A Using the All-sky Imaging Capability of the OVRO-LWA
Artikel i vetenskaplig tidskrift, 2018

We have conducted the most sensitive low-frequency (below 100 MHz) search to date for prompt, low-frequency radio emission associated with short-duration gamma-ray bursts (GRBs), using the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA). The OVRO-LWA's nearly full-hemisphere field of view (similar to 20,000 square degrees) allows us to search for low-frequency (sub-100 MHz) counterparts for a large sample of the subset of GRB events for which prompt radio emission has been predicted. Following the detection of short GRB 170112A by Swift, we used all-sky OVRO-LWA images spanning one hour prior to and two hours following the GRB event to search for a transient source coincident with the position of GRB 170112A. We detect no transient source to within a 3 sigma flux density limit of 4.5. Jy at 13 s timescales for frequencies spanning 27-84. MHz. We place constraints on a number of models predicting prompt, low-frequency radio emission accompanying short GRBs and their potential binary neutron star merger progenitors, and place an upper limit of L-radio/L gamma less than or similar to 3.5 x 10(-6) on the fraction of energy released in the prompt radio emission, under the assumptions of negligible scattering of the radio pulse and beaming of emission along the line of sight. These observations serve as a pilot effort for a program targeting a wider sample of both short and long GRBs with the OVRO-LWA, including bursts with confirmed redshift measurements that are critical to placing constraining limits on prompt radio emission models, as well as a program for the follow-up of gravitational wave compact binary coalescence events detected by advanced LIGO and Virgo.

radiation mechanisms: non-thermal

radio continuum: general

gamma-ray burst: general

gravitational waves

gamma-ray burst: individual (170112A)


Marin M. Anderson

California Institute of Technology (Caltech)

Gregg Hallinan

California Institute of Technology (Caltech)

Michael W. Eastwood

California Institute of Technology (Caltech)

Ryan M. Monroe

California Institute of Technology (Caltech)

Harish K. Vedantham

California Institute of Technology (Caltech)

Stephen Bourke

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

Lincoln J. Greenhill

Harvard-Smithsonian Center for Astrophysics

Jonathon Kocz

California Institute of Technology (Caltech)

T. Joseph W. Lazio

California Institute of Technology (Caltech)

Danny C. Price

Swinburne University of Technology

Harvard-Smithsonian Center for Astrophysics

Frank K. Schinzel

University of New Mexico

National Radio Astronomy Observatory

Yuankun Wang

California Institute of Technology (Caltech)

David P. Woody

California Institute of Technology (Caltech)

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 864 1 22


Subatomär fysik

Astronomi, astrofysik och kosmologi

Atom- och molekylfysik och optik



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