Synthetic spectra in the range of 1–1700 Å, calculated from the DEMs for quiescent (black) and flaring (red) state of Proxima Centauri. The pink shaded region marks the wavelength coverage of our Chandra data, while the blue shaded region marks the coverage of the Hubble data. For the flaring state, the highest amplitude by far is seen for the Lyα line, which cannot be predicted well by our data since the line is formed at lower temperatures. The flux density was binned by a minimum flux of 2 × 10⁻¹⁴ erg s⁻¹ cm⁻² Å⁻¹ per bin (top) and by 100 Å bins (bottom) at a distance of 1 AU.