  We present a simplified web-based application for simulating x-ray and
photoelectron spectra of transition metals, built around the notion that
web-based applications lower the bar for novice users. The application provides
a simple interface to simulate x-ray absorption spectroscopy, resonant
inelastic x-ray scattering, and angle-resolved photoemission spectroscopy,
incorporating the effects of local electronic interactions, which give rise to
multiplets, spin-orbit coupling, crystal field effects, and ligand
hybridization/charge transfer. Results can be obtained that highlight the key
role of photon polarization.
