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American Astronomical Society, Astrophysical Journal, 1(954), p. 75, 2023

DOI: 10.3847/1538-4357/acdfcb

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Search for Correlations of High-energy Neutrinos Detected in IceCube with Radio-bright AGN and Gamma-Ray Emission from Blazars

Journal article published in 2023 by A. Balagopal V. ORCID, Rasha Abbasi ORCID, Markus Ackermann ORCID, J. Adams, Sanjib Kumar Agarwalla ORCID, Juan Antonio Aguilar Sánchez, Markus Ahlers ORCID, Jean-Marco Alameddine ORCID, Nm M. Amin, Yosuke Ashida ORCID, K. Andeen, S. Athanasiadou, Gisela Anton ORCID, Xinhua Bai ORCID, V. Aswathi Balagopal and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Data provided by SHERPA/RoMEO

Abstract

Abstract The IceCube Neutrino Observatory sends realtime neutrino alerts with a high probability of being astrophysical in origin. We present a new method to correlate these events and possible candidate sources using 2089 blazars from the Fermi-LAT 4LAC-DR2 catalog and with 3413 active galactic nuclei (AGNs) from the Radio Fundamental Catalog. No statistically significant neutrino emission was found in any of the catalog searches. The result suggests that a small fraction, <1%, of the studied AGNs emit neutrinos that pass the alert criteria, and is compatible with prior evidence for neutrino emission presented by IceCube and other authors from sources such as TXS 0506 + 056 and PKS 1502 + 106. We also present cross-checks to other analyses that claim a significant correlation using similar data samples.