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The JAGWAR Prowls LIGO/Virgo O3 Paper I: Radio Search of a Possible Multi-Messenger Counterpart of the Binary Black Hole Merger Candidate S191216ap

Bhakta, D. and Mooley, K. P. and Corsi, A. and Balasubramanian, A. and Dobie, D. and Frail, D. A. and Hallinan, G. and Kaplan, D. L. and Myers, S. T. and Singer, L. P. (2020) The JAGWAR Prowls LIGO/Virgo O3 Paper I: Radio Search of a Possible Multi-Messenger Counterpart of the Binary Black Hole Merger Candidate S191216ap. . (Unpublished)

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We present a sensitive search with the Karl G. Jansky Very Large Array (VLA) for the radio counterpart of the gravitational wave candidate S191216ap, classified as a binary black hole merger, and suggested to be a possible multi-messenger event, based on the detection of a high energy neutrino and a TeV photon. We carried out a blind search at C band (4-8 GHz) over 0.3 deg² of the gamma-ray counterpart of S191216ap reported by the High-Altitude Water Cherenkov Observatory (HAWC). Our search, spanning three epochs over 130 days post-merger and having mean source-detection threshold of 75μJy/beam (4σ), yielded 5 variable sources associated with AGN activity and no definitive counterpart of S191216ap. We find <2% (3.0±1.3%) of the persistent radio sources at 6 GHz to be variable on a timescale of <1 week (week--months), consistent with previous radio variability studies. Our 4σ radio luminosity upper limit of ∼1.2×10²⁸ erg s⁻¹ Hz⁻¹ on the afterglow of S191216ap, within the HAWC error region, is 5-10 times deeper than previous BBH radio afterglow searches. Comparing this upper limit with theoretical expectations given by Perna et al. for putative jets launched by BBH mergers, for on-axis jets having energy ≃10⁴⁹ erg, we can rule out jet opening angles ≲20 degrees (assuming that the counterpart lies within the 1σ HAWC region that we observed).

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Bhakta, D.0000-0002-7965-3076
Mooley, K. P.0000-0002-2557-5180
Corsi, A.0000-0001-8104-3536
Balasubramanian, A.0000-0003-0477-7645
Dobie, D.0000-0003-0699-7019
Hallinan, G.0000-0002-7083-4049
Kaplan, D. L.0000-0001-6295-2881
Singer, L. P.0000-0001-9898-5597
Additional Information:The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. K.P.M. is currently a Jansky Fellow of the National Radio Astronomy Observatory. K.P.M and G.H. acknowledge support from the National Science Foundation Grant AST-1911199. A.C., A.B., and D.B. acknowledge support from the National Science Foundation via the CAREER grant #1455090. DK is supported by NSF grant AST-1816492.
Group:Astronomy Department
Funding AgencyGrant Number
Jansky FellowshipUNSPECIFIED
Subject Keywords:surveys | catalogs | general | radio continuum
Record Number:CaltechAUTHORS:20210202-095244583
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107860
Deposited By: George Porter
Deposited On:03 Feb 2021 17:51
Last Modified:19 Jan 2023 16:48

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