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Fig. 1.


Top panel: γ-ray light curve of PKS 0502+049 above 214.0 MeV from August 4, 2008 to January 1st, 2018, with a constant uncertainty of 15%. Bottom panels: γ-ray light curve (a) and photon index (b), X-ray (c) and optical/UV light curves (d). The periods P1, P2 and P3 are market with light gray, light red and light yellow colors, respectively, and the period when a 3.5σ excess of neutrinos between September 2014 and March 2015 was observed (P0) is in light blue. The blue dot-dashed line shows the period of detection of a HE neutrino event on September 22, 2017.

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