Detection percentage p(λ1 ) as a function of the maximum linear frequency shift |Max (δν)|L obtained from 100 realizations of each simulated spectrum (see Sect. 4.2). Each solid line corresponds to a given (color-coded) level of noise σ0. The opened red circles correspond to the Kepler stars which successfully passed the selection criterion λ1 , while the filled red circles indicate the stars which passed the selection criterion λ2 as well (see Sect. 5). The y coordinate of each star represents the percentage p(λ1 ) of being detected according to the simulations. The horizontal dashed line indicates the 50% detection threshold.
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