PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events
We report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events belong to Gold alerts, which have a significant probability of being of astrophysical origin. Within the events’ 90% posi...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ad9f40 |
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| author | Shunhao Ji Zhongxiang Wang Dong Zheng |
| author_facet | Shunhao Ji Zhongxiang Wang Dong Zheng |
| author_sort | Shunhao Ji |
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| description | We report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events belong to Gold alerts, which have a significant probability of being of astrophysical origin. Within the events’ 90% positional uncertainty regions, we, respectively, find PKS 2332–017 and PMN J1916–1519. The first source is a flat-spectrum radio quasar at redshift z = 1.18, and the second is a blazar of an uncertain type with photometric z = 0.968. As they correspondingly had a γ -ray flare temporally coincident with the arrival times of IC-130127A and IC-131204A, we identify them as the respective neutrino emitters. Detailed analysis of the γ -ray data for the two blazars, obtained with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope, is conducted. The two flares, respectively, from PKS 2332–017 and PMN J1916–1519 lasted ~4 yr and ~4 months and showed possible emission hardening by containing high-energy ~2–10 GeV photons in the emissions. Accompanying the flare of PKS 2332–017, optical and mid-infrared brightening variations were also observed. We discuss the properties of the two sources and compare the properties with those of the previously reported (candidate) neutrino-emitting blazars. |
| format | Article |
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| institution | Kabale University |
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| spelling | doaj-art-91798bd870254adfa5d062e4c32a87772025-01-13T06:31:02ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-019791110.3847/1538-4357/ad9f40PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino EventsShunhao Ji0Zhongxiang Wang1https://orcid.org/0000-0003-1984-3852Dong Zheng2Department of Astronomy, School of Physics and Astronomy, Yunnan University , Kunming 650091, People’s Republic of China ; jishunhao@mail.ynu.edu.cn, wangzx20@ynu.edu.cnDepartment of Astronomy, School of Physics and Astronomy, Yunnan University , Kunming 650091, People’s Republic of China ; jishunhao@mail.ynu.edu.cn, wangzx20@ynu.edu.cn; Shanghai Astronomical Observatory , Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of ChinaDepartment of Astronomy, School of Physics and Astronomy, Yunnan University , Kunming 650091, People’s Republic of China ; jishunhao@mail.ynu.edu.cn, wangzx20@ynu.edu.cnWe report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events belong to Gold alerts, which have a significant probability of being of astrophysical origin. Within the events’ 90% positional uncertainty regions, we, respectively, find PKS 2332–017 and PMN J1916–1519. The first source is a flat-spectrum radio quasar at redshift z = 1.18, and the second is a blazar of an uncertain type with photometric z = 0.968. As they correspondingly had a γ -ray flare temporally coincident with the arrival times of IC-130127A and IC-131204A, we identify them as the respective neutrino emitters. Detailed analysis of the γ -ray data for the two blazars, obtained with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope, is conducted. The two flares, respectively, from PKS 2332–017 and PMN J1916–1519 lasted ~4 yr and ~4 months and showed possible emission hardening by containing high-energy ~2–10 GeV photons in the emissions. Accompanying the flare of PKS 2332–017, optical and mid-infrared brightening variations were also observed. We discuss the properties of the two sources and compare the properties with those of the previously reported (candidate) neutrino-emitting blazars.https://doi.org/10.3847/1538-4357/ad9f40BlazarsGamma-ray sourcesNeutrino astronomy |
| spellingShingle | Shunhao Ji Zhongxiang Wang Dong Zheng PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events The Astrophysical Journal Blazars Gamma-ray sources Neutrino astronomy |
| title | PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| title_full | PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| title_fullStr | PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| title_full_unstemmed | PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| title_short | PKS 2332–017 and PMN J1916–1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| title_sort | pks 2332 017 and pmn j1916 1519 candidate blazar counterparts to two high energy neutrino events |
| topic | Blazars Gamma-ray sources Neutrino astronomy |
| url | https://doi.org/10.3847/1538-4357/ad9f40 |
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