| Title: |
Search for Neutrino Emission from Hard X-Ray AGN with IceCube |
| Authors: |
Abbasi, R; Ackermann, M; Adams, J; Agarwalla, SK; Aguilar, JA; Ahlers, M; Alameddine, J; Amin, NM; Andeen, K; Argüelles, C; Ashida, Y; Athanasiadou, S; Ausborm, L; Axani, SN; Bai, X; Balagopal V., A; Baricevic, M; Barwick, SW; Bash, S; Basu, V; Bay, R; Beatty, JJ; Becker Tjus, J; Beise, J; Sarkar, S |
| Publisher Information: |
American Astronomical Society |
| Publication Year: |
2025 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
Active galactic nuclei (AGN) are promising candidate sources of high-energy astrophysical neutrinos, since they provide environments rich in matter and photon targets where cosmic-ray interactions may lead to the production of gamma rays and neutrinos. We searched for high-energy neutrino emission from AGN using the Swift-BAT Spectroscopic Survey catalog of hard X-ray sources and 12 yr of IceCube muon track data. First, upon performing a stacked search, no significant emission was found. Second, we searched for neutrinos from a list of 43 candidate sources and found an excess from the direction of two sources, the Seyfert galaxies NGC 1068 and NGC 4151. We observed NGC 1068 at flux ϕνμ+ν¯μ = 4.02−1.52+1.58×10−11 TeV−1 cm−2 s−1 normalized at 1 TeV, with a power-law spectral index γ = 3.10 −0.22+0.26 , consistent with previous IceCube results. The observation of a neutrino excess from the direction of NGC 4151 is at a posttrial significance of 2.9σ. If interpreted as an astrophysical signal, the excess observed from NGC 4151 corresponds to a flux ϕνμ+ν¯μ = 1.51−0.81+0.99×10−11 TeV−1 cm−2 s−1 normalized at 1 TeV and γ = 2.83 −0.28+0.35 . |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.3847/1538-4357/ada94b |
| Availability: |
https://doi.org/10.3847/1538-4357/ada94b; https://ora.ox.ac.uk/objects/uuid:09c2bcf9-2cd2-40cf-abcb-3652a5077c13 |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.DB909948 |
| Database: |
BASE |