High-energy 3−500 GeV TS-map, integrating 7 yr of data. The contour black dashed lines are TS surfaces representing 68%, 95% and 99% containment region for the γ-ray signature (from inner to outer lines). The 2WHSP J042218.3+195054 position is highlighted by a thick green circle centered on +. The 3FGL J0421.6+1950 position is highlighted by the cyan circle centered on ×, ≈9.7′ away from the high-energy TS peak.