χ² distributions associated with three input parameters of the SED fit, the dust attenuation (upper-left panel) and t/τ (upper-right panel), and two output properties, the stellar mass (lower-left) panel and SFR averaged over the last 10 Myrs (lower-right panel) produced by CIGALE (Boquien et al. 2019) for the fit of the red core SED of the galaxy ID15371 at z_spec = 1.921. The thick and thin black dashed lines correspond to the 68% and 95% confidence intervals, respectively.