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One-zone lepto-hadronic models cannot give that neutrino luminosity without overproducing X rays and gamma rays from cascades. Determine the emission geometry (multiple zones, a compact core dense in target photons, jet interaction with clouds or stars) that fits both episodes, and whether it allows gamma-ray blazars to supply more than $\\sim 10\\%$ of the diffuse flux. Answer: a model fitting both episodes and the multiwavelength data.","problem_ref":"b7f98c96e7a8a69765f5ac4c5efbf3cab511ac38381511541f66feb7d33e61df","references":"","settled_by":"Further neutrino flares from blazars with simultaneous X-ray and MeV coverage that fix the cascade budget.","status_note":"","title":"How did blazar TXS 0506+056 emit neutrinos without gamma 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