Chandra MEG photon spectrum for NGC 4593 against wavelength in the source rest frame, using ﹩z=0.0083﹩. The data are binned at 0.02 Å, approximately the MEG FWHM spectral resolution (0.023 Å). Labels show the Lyman series wavelengths (blue) for Ar, S, Si, Mg, Na, Ne, O, and N. Also shown (red) are the wavelengths of the helium‐like triplets (resonance, intercombination, and forbidden lines) of Ar, S, Si, Mg, Ne, and O.