The JAGWAR Prowls LIGO/Virgo O3 Paper I: Radio Search of a Possible Multimessenger Counterpart of the Binary Black Hole Merger Candidate S191216ap
The JAGWAR Prowls LIGO/Virgo O3 Paper I: Radio Search of a Possible Multimessenger Counterpart of the Binary Black Hole Merger Candidate S191216ap
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DOI：
10.3847/1538-4357/abeaa8
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
D. Bhakta;K. Mooley;A. Corsi;A. Balasubramanian;D. Dobie;D. Frail;G. Hallinan;D. Kaplan;S. Myers;L. Singer
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文献类型：
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作者：
D. Bhakta;K. Mooley;A. Corsi;A. Balasubramanian;D. Dobie;D. Frail;G. Hallinan;D. Kaplan;S. Myers;L. Singer
我们提出了一个敏感的搜索与卡尔G。Jansky甚大阵是引力波候选者S191216 ap的射电对应物，根据对高能中微子和TeV光子的探测，该候选者被归类为二元黑洞合并，并被认为是可能的多信使事件。我们在C波段（4-8 GHz）对高海拔水切伦科夫天文台（HAWC）报道的S191216 ap的γ射线对应物进行了0.3 deg 2以上的盲搜索。我们的搜索跨越了合并后130天内的三个时期，平均源探测阈值为75 μJy光束−1（4σ），得到了五个与活动星系核活动有关的可变源，没有确定的S191216 ap对应源。我们发现<2%（3.0% ± 1.3%）的6 GHz持续射电源在<1周（周-月）的时间尺度上是可变的，与以前的无线电变异性研究一致。我们对S191216 ap余辉的4σ射电光度上限为1.2 × 1028 erg s−1 Hz−1，在HAWC误差范围内，比以前的双黑洞（BBH）射电余辉搜索深5-10倍。将这个上限与佩尔纳等人对BBH合并产生的假定喷流给出的理论期望值进行比较，对于能量为1049 erg的轴上喷流，我们可以排除喷流张开角为1049 erg的可能性（假设对应喷流位于我们观察到的1σ HAWC区域内）。
We present a sensitive search with the Karl G. Jansky Very Large Array for the radio counterpart of the gravitational wave candidate S191216ap, which is classified as a binary black hole merger and suggested to be a possible multimessenger 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 Cerenkov Observatory (HAWC). Our search, spanning three epochs over 130 days of postmerger and having a mean source-detection threshold of 75 μJy beam−1 (4σ), yielded five variable sources associated with active galactic nucleus 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 binary black hole (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 with energy ≃1049 erg, we can rule out jet opening angles ≲ 20° (assuming that the counterpart lies within the 1σ HAWC region that we observed).