IC photoabsorption cross section of the 3p⁶3d ²D_3/2 ground state of K-like Zn XII computed with BPRM (black curve) and AUTOSTRUCTURE (red curve). Panel a: valence and L-edge regions; the BPRM cross section has been convolved with a Gaussian of width ΔE/E = 0.001. Panel b: K-edge region; the AUTOSTRUCTURE energy scale has been shifted by 0.9 Ryd to obtain resonance positional matching. C. Mendoza et al.: K-shell photoabsorption