Left: uncertainties (open diamonds: 50 days, dashed line: 400 days) and mean absolute deviations multiplied by 0.8 (see text, filled diamonds: 50 days, solid line: 400 days) in  ⟨ Δν ⟩  as a function of  ⟨ Δν ⟩  for results from the different methods: COR:UP (panel A), COR:EACF (panel B), OCT:PS ⊗ PS (panel C) and CAN (panel D). Right: uncertainties (open diamonds: 50 days, dashed line: 400 days) and mean absolute deviations (filled diamonds: 50 days, solid line: 400 days) in ν_max as a function of ν_max for results from three different methods: COR (panel E), OCT (panel F) and CAN (panel G).