PKS~2332$-$017 and PMN J1916$-$1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866915061724872704 |
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| author | Ji, Shunhao Wang, Zhongxiang Zheng, Dong |
| author_facet | Ji, Shunhao Wang, Zhongxiang Zheng, Dong |
| contents | We report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events belong to Gold alerts, which have a significant probability of being of astrophysical origin.Within the events' 90\% positional uncertainty regions, we respectively find PKS~2332$-$017 and PMN J1916$-$1519. The first source is a flat-spectrum radio quasar at redshift $z= 1.18$ and the second 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 (LAT) onboard {\it the Fermi Gamma-ray Space Telescope (Fermi)}, is conducted. The two flares respectively from PKS~2332$-$017 and PMN~J1916$-$1519 lasted $\sim$4\,yr and $\sim$4\,month, and showed possible emission hardening by containing high-energy $\sim$2--10\,GeV photons in the emissions. Accompanying the flare of PKS~2332$-$017, optical and MIR brightening variations were also observed. We discuss the properties of the two sources and compare the properties with those of the previously reported (candidate) neutrino-emitting blazars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01448 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | PKS~2332$-$017 and PMN J1916$-$1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events Ji, Shunhao Wang, Zhongxiang Zheng, Dong High Energy Astrophysical Phenomena We report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events belong to Gold alerts, which have a significant probability of being of astrophysical origin.Within the events' 90\% positional uncertainty regions, we respectively find PKS~2332$-$017 and PMN J1916$-$1519. The first source is a flat-spectrum radio quasar at redshift $z= 1.18$ and the second 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 (LAT) onboard {\it the Fermi Gamma-ray Space Telescope (Fermi)}, is conducted. The two flares respectively from PKS~2332$-$017 and PMN~J1916$-$1519 lasted $\sim$4\,yr and $\sim$4\,month, and showed possible emission hardening by containing high-energy $\sim$2--10\,GeV photons in the emissions. Accompanying the flare of PKS~2332$-$017, optical and MIR brightening variations were also observed. We discuss the properties of the two sources and compare the properties with those of the previously reported (candidate) neutrino-emitting blazars. |
| title | PKS~2332$-$017 and PMN J1916$-$1519: Candidate Blazar Counterparts to Two High-energy Neutrino Events |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2411.01448 |