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Fig. 2
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Top row: Fermi-LAT count maps above 10 GeV and 20 GeV within the full-phase range. Bottom row: Fermi-LAT TS maps above 10 GeV during the on- and off-pulse phases, respectively. The black diamond indicates the position of the gamma-ray pulsar PSR J2021+4026 (Abdo et al. 2009a).
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