Patterns in the Multiwavelength Behavior of Candidate Neutrino Blazars
Motivated by the identification of the blazar TXS 0506+056 as the first promising high-energy neutrino counterpart candidate, we search for additional neutrino blazar candidates among the Fermi-Large Area Telescope detected blazars. We investigate the multiwavelength behavior from radio to GeV gamma-rays of blazars found to be in spatial coincidence with single high-energy neutrinos and lower-energy neutrino flare candidates. In addition, we compare the average gamma-ray emission of the potential neutrino-emitting sources to the entire sample of gamma-ray blazars. We find that neutrino-emitting blazar candidates are statistically compatible with hypotheses of both a linear correlation and no correlation between neutrino and gamma-ray energy flux. ; Initiative and Networking Fund of the Helmholtz Association National Science Foundation (NSF) AST-1908952 AST-1920392 AST1911074 AST-1515927 AST-1908570 AST0808050 AST-1109911 AST-0908816 European Research Council under the European Union's Horizon 2020 research and innovation program 771282 Comisión Nacional de Investigación Cientifica y Tecnológica (CONICYT) Basal AFB-170002 Academy of Finland 317383 320085 United States Department of Energy (DOE) DE-AC02-76SF00515 Gordon and Betty Moore Foundation GBMF5490 Mt. Cuba Astronomical Foundation Ohio State University Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) Villum Foundation George Skestos National Aeronautics & Space Administration (NASA) NNX08AW31G NNX11A043G NNX14AQ89G National Aeronautics & Space Administration (NASA) NNG05GF22G National Science Foundation (NSF) AST-0909182 AST-1313422