Example of two different background models fit using DIAMONDS + BACKGROUND. The models show two Harvey-like profiles for TIC 408842743 and three for TIC 38511251. This results in a larger number of free parameters that need to be estimated in the latter case with respect to the former. The PSD of the star is shown in gray, and its smoothing by Δν is shown in black. The dot-dashed yellow line represents the level of the white noise, and the Harvey-like components are indicated with dot-dashed blue lines. The dot-dashed magenta line shows the Gaussian envelope of the solar-like oscillations. The overall fit of the background without (with) the Gaussian envelope is marked with a solid red (dashed green) line.