The detection of a high energy muon neutrino on 22 September 2017 by IceCube neutrino detector coincides with the multiwavelength flaring from the BL Lac object TXS 0506+056, most likely confirming AGN as a source of high energy cosmic rays and neutrinos. Using the photohadronic model, we have explained the very high energy $\gamma$-rays observed by MAGIC telescopes few days after the neutrino event and extend the model to calculate the neutrino flux at different windows consistent with the flaring period of TXS 0506+056 and compared with the IceCube and MAGIC estimates. We also use this model to estimate the neutrino flux from the flaring of FSRQ PKS B1424-418 which is believed to be associated with the 2 PeV neutrino event observed by IceCube.

中文翻译：

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TXS 0506+056 中微子和伽马射线发射的光强子模型

IceCube 中微子探测器于 2017 年 9 月 22 日探测到一个高能μ子中微子，与来自 BL Lac 天体 TXS 0506+056 的多波长耀斑相吻合，很可能证实 AGN 是高能宇宙射线和中微子的来源。使用光强子模型，我们解释了中微子事件几天后 MAGIC 望远镜观测到的极高能量 $\gamma$ 射线，并扩展模型以计算与 TXS 0506+056 的耀斑周期一致的不同窗口的中微子通量并与 IceCube 和 MAGIC 的估计进行比较。我们还使用该模型来估计 FSRQ PKS B1424-418 燃烧产生的中微子通量，据信这与 IceCube 观测到的 2 PeV 中微子事件有关。