The Atomic Data for Astrophysics server provides links to basic atomic data required for calculation of the ionization state of astrophysical plasmas and for quantitative spectroscopy. Most of these data are utilized in the photoionization code Cloudy and other radiative-collisional, photoionization, and coronal plasma codes. The data are regularly updated.

This server is maintained by Dima Verner at the Department of Physics and Astronomy, University of Kentucky. Your comments, questions and suggestions are welcome. If you find this server helpful, and use the data retrieved through the server for your research, I would appreciate acknowledging it in your papers.

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