| Title: |
Evidence for Neutrino Emission from X-Ray-bright Active Galactic Nuclei with IceCube |
| Authors: |
Abbasi, R; Ackermann, M; Adams, J; Agarwalla, SK; Aguilar, JA; Ahlers, M; Alameddine, JM; Ali, S; Amin, NM; Andeen, K; Argüelles, C; Ashida, Y; Athanasiadou, S; Axani, SN; Babu, R; Bai, X; Baines-Holmes, J; Balagopal V., A; Barwick, SW; Bash, S; Basu, V; Bay, R; Beatty, JJ; Becker Tjus, J; Behrens, P; Sarkar, S |
| Publisher Information: |
American Astronomical Society |
| Publication Year: |
2026 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
Recently, IceCube reported neutrino emission from the Seyfert galaxy NGC 1068. Using 13.1 yr of IceCube data, we present a follow-up search for neutrino sources in the northern sky. NGC 1068 remains the most significant neutrino source among 110 preselected gamma-ray emitters while also being spatially compatible with the most significant location in the northern sky. Its energy spectrum is characterized by an unbroken power-law with spectral index γ = 3.4 ± 0.2. Consistent with previous results, the observed neutrino flux exceeds its gamma-ray counterpart by at least 2 orders of magnitude. Motivated by this disparity and the high X-ray luminosity of the source, we selected 47 X-ray-bright Seyfert galaxies from the Swift/BAT spectroscopic survey that were not included in the list of gamma-ray emitters. When testing this collection for neutrino emission, we observe a 3.3σ excess from an ensemble of 11 sources, with NGC 1068 excluded from the sample. Our results strengthen the evidence that X-ray-bright cores of active galactic nuclei are neutrino emitters. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.3847/2041-8213/ae4aad |
| Availability: |
https://doi.org/10.3847/2041-8213/ae4aad; https://ora.ox.ac.uk/objects/uuid:94216349-248e-4d9d-9af0-853876f7f582 |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.E393A2D9 |
| Database: |
BASE |