Comparison between the Chandra MEG±1 spectrum (black full line) and spectra obtained from the different models discussed in Sect. 4. Top: accretion column with a magnetic dipole geometry and change of gravitational potential with height (blue full line, Model B, see Sect. 4.3 for details). Bottom: EMD derived from the fit of the loci curves obtained from the flux measurements (orange full line, Model D, see Sect. 4.6 for details). The model-data panels show that the continuum emission from model B overestimates the data. Given that all the spectral models were derived assuming the same accretion rate, Ṁ = 1.74 × 10¹⁵ g s^-1, model B requires lower accretion rates to match the data.