Liao, Neng-Hui and Sheng, Zhen-Feng and Jiang, Ning and Chang, Yu-Ling and Wang, Yi-Bo and Xu, Dong-Lian and Shu, Xin-Wen and Fan, Yi-Zhong and Wang, Ting-Gui (2022) GB6 J2113+1121: A Multiwavelength Flaring γ-Ray Blazar Temporally and Spatially Coincident with the Neutrino Event IceCube-191001A. The Astrophysical Journal Letters, 932 (2). L25. ISSN 2041-8205
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Abstract
A radio-emitting tidal disruption event (AT2019dsg) is proposed as a likely counterpart to the IceCube neutrino event IC 191001A. In this work, we have revisited the Fermi-LAT data in the direction of the neutrino and confirmed no signal at the site of AT2019dsg. Instead, at the edge of the 90% confidence level error region of this neutrino, there is a γ-ray transient source associated with the blazar GB6 J2113+1121. In 2019 May, GB6 J2113+1121 was undergoing a γ-ray flare that is unprecedented since the start of the Fermi-LAT operation, with a variability amplitude of about 20 fold. Similar violent flares of GB6 J2113+1121, unobserved before, have also been detected in the optical bands. Moreover, the blazar remained in a high-flux state in the infrared bands when IC 191001A arrived, though the blazar 's γ-ray and optical activities have temporarily ceased. Motivated by this spatial and temporal coincidence, we suggest that GB6 J2113+1121 is a candidate to be the counterpart to IC 191001A. The jet properties of GB6 J2113+1121 are investigated, which are found to be comparable with that of neutrino-emitting blazars (candidates). A specific analysis of archival IceCube data in this direction and future observations would put further constraints on the origin of the neutrino.
Item Type: | Article |
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Subjects: | e-Archives > Physics and Astronomy |
Depositing User: | Managing Editor |
Date Deposited: | 26 Apr 2023 06:13 |
Last Modified: | 18 Jun 2024 07:19 |
URI: | http://ebooks.abclibraries.com/id/eprint/1395 |