This online workshop, held on January 17-19, 2022, celebrated the fifty years of the theoretical X-ray spectroscopic study in the space research institute SRON, the Netherlands. The workshop will not only look back on the history of SPEX, but will emphasize the science enabled by it in particular with the high spectral resolution X-ray data. This workshop will also identify the progress in the atomic modeling community, showing how it will advance the study with current and future astrophysical data. On this Zenodo community page, participants of the workshop can share their presentations, posters and/or other contributions.
We accept contributions from participants of the conference "50 years astronomical X-ray spectroscopy in the Netherlands", which took place online on January 17-19, 2022.