Same as Fig. 1, but showing the results when a synthetic spectrum of the same wavelength spacing and noise properties as the actual HR 8799e data is retrieved. Green posteriors indicate the retrieval where the scaling parameters of the GPI and SPHERE spectra were retrieved, while gray posteriors indicate the results that neglected the scaling parameters. This test is described further in Sect. 4.2.2. In panel a, the black points in the K-band correspond to synthetic observations with the same data quality as the GRAVITY observations reported in Gravity Collaboration (2019), while the gray points show the data at the same quality as found for the two new GRAVITY observationspresented in this work. All three synthetic GRAVITY data sets were fitted simultaneously.