@article {22774,
	title = {Comprehensive Multimessenger Modeling of the Extreme Blazar 3HSP J095507.9+355101 and Predictions for IceCube},
	volume = {899},
	year = {2020},
	month = {2020},
	abstract = {3HSP J095507.9+355101 is an extreme blazar that has been possibly associated with a high-energy neutrino (IceCube-200107A) detected 1 day before the blazar was found to undergo a hard X-ray flare. We perform a comprehensive study of the predicted multimessenger emission from 3HSP J095507.9+355101 during its recent X-ray flare, but also in the long term. We focus on one-zone leptohadronic models, but we also explore alternative scenarios: (i) a blazar-core model, which considers neutrino production in the inner jet, close to the supermassive black hole; (ii) a hidden external-photon model, which considers neutrino production in the jet through interactions with photons from a weak broad line region; (iii) a proton-synchrotron model, where high-energy protons in the jet produce γ-rays via synchrotron; and (iv) an intergalactic cascade scenario, where neutrinos are produced in the intergalactic medium by interactions of a high-energy cosmic-ray beam escaping the jet. The Poisson probability to detect a single muon neutrino in 10 years from 3HSP J095507.9+355101 with the real-time IceCube alert analysis is \~{}1\% (3\%) for the most optimistic one-zone leptohadronic model (the multi-zone blazar-core model). Meanwhile, detection of a single neutrino during the 44-day-long high X-ray flux-state period following the neutrino detection is 0.06\%, according to our most optimistic leptohadronic model. The most promising scenarios for neutrino production also predict strong intrasource γ-ray attenuation above \~{}100 GeV. If the association is real, then IceCube-Gen2 and other future detectors should be able to provide additional evidence for neutrino production in 3HSP J095507.9+355101 and other extreme blazars.},
	keywords = {1100, 158, 164, 637, 739, Astrophysics - High Energy Astrophysical Phenomena, BL Lacertae objects, Blazars, Gamma-rays, High energy astrophysics, Neutrino astronomy},
	isbn = {0004-637X},
	url = {https://ui.adsabs.harvard.edu/abs/2020ApJ...899..113P},
	author = {Petropoulou, Maria and Oikonomou, Foteini and Mastichiadis, Apostolos and Murase, Kohta and Padovani, Paolo and Vasilopoulos, Georgios and Giommi, Paolo}
}
