| 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, JM; Amin, NM; Andeen, K; Argüelles, C; Ashida, Y; Athanasiadou, S; Ausborm, L; Axani, SN; Bai, X; Balagopal, AV; Baricevic, M; Barwick, SW; Bash, S; Basu, V; Bay, R; Beatty, JJ; Becker Tjus, J; Beise, J; Bellenghi, C; Benning, C; BenZvi, S; Berley, D; Bernardini, E; Besson, DZ; Blaufuss, E; Bloom, L; Blot, S; Bontempo, F; Book Motzkin, JY; Boscolo Meneguolo, C; Böser, S; Botner, O; Böttcher, J; Braun, J; Brinson, B; Brostean-Kaiser, J; Brusa, L; Burley, RT; Butterfield, D; Campana, MA; Caracas, I; Carloni, K; Carpio, J; Chattopadhyay, S; Chau, N; Chen, Z; Chirkin, D; Choi, S; Clark, BA; Coleman, A; Collin, GH; Connolly, A; Conrad, JM; Coppin, P; Corley, R; Correa, P; Cowen, DF; Dave, P; De Clercq, C; DeLaunay, JJ; Delgado, D; Deng, S; Desai, A; Desiati, P; de Vries, KD; de Wasseige, G; DeYoung, T; Diaz, A; Díaz-Vélez, JC; Dierichs, P; Dittmer, M; Domi, A; Draper, L; Dujmovic, H; Dutta, K; DuVernois, MA; Ehrhardt, T; Eidenschink, L; Eimer, A; Eller, P; Ellinger, E; El Mentawi, S; Elsässer, D; Engel, R; Erpenbeck, H; Evans, J; Evenson, PA; Fan, KL; Fang, K; Farrag, K; Fazely, AR; Fedynitch, A; Feigl, N; Fiedlschuster, S |
| Source: |
Astrophysical Journal, vol 981, iss 2 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2025 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
Astronomical and Space Sciences; Atomic; Molecular; Nuclear; Particle and Plasma Physics; Physical Chemistry (incl. Structural); Astronomy & Astrophysics; Astronomical sciences; Particle and high energy physics; Space sciences |
| 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-+1.521.58 × 10-11 TeV−1 cm−2 s−1 normalized at 1 TeV, with a power-law spectral index γ = 3.10-+0.220.26, 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-+0.810.99 × 10-11 TeV−1 cm−2 s−1 normalized at 1 TeV and γ = 2.83-+0.280.35 |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt5312t32b; https://escholarship.org/uc/item/5312t32b; https://escholarship.org/content/qt5312t32b/qt5312t32b.pdf |
| DOI: |
10.3847/1538-4357/ada94b |
| Availability: |
https://escholarship.org/uc/item/5312t32b; https://escholarship.org/content/qt5312t32b/qt5312t32b.pdf; https://doi.org/10.3847/1538-4357/ada94b |
| Rights: |
CC-BY |
| Accession Number: |
edsbas.EE2B83DC |
| Database: |
BASE |