Mode amplitudes for KIC 10257278 as a function of the corresponding oscillation frequencies. Amplitude measurements as defined by Eq. (5) for each angular degree (ℓ = 0 blue squares, ℓ = 2 green triangles, ℓ = 3 yellow stars, and resolved ℓ = 1 mixed modes red circles). Open symbols represent modes with detection probability under the suggested threshold (see Sect. 2.3). The 68% credible intervals for the amplitudes as derived by Diamonds  are shown for each data point. The solid red line represents a polynomial fit to the amplitudes of the ℓ = 1 mixed modes, included to emphasize the trend with frequency. The dashed vertical line indicates the ν_max value listed in Table A.2.