Various Atomic Data used in the study of Photoionized Gas

• Atomic Data for Astrophysics
  An extremely rich resource maintained by Dima Verner, used within CLOUDY and many other Photoionization Codes. The atomic data is supplied in the form of references to the origin work, ASCII tables and/or Fortran subroutines. Topics covered include Energy levels, Photon energies & transition probabilities, Photoionization Cross-sections, Recombination rates & coefficients, Collisional excitation & ionization rates & coefficients, Autoionization rates & coefficients, Charge transfer rates & coefficients, Auger probabilities. Furthermore under each topic a number of links to other sources of information are also supplied (for example covering Stark broadening effects & Opacities). See also the many other sources of appropriate information under the "Energy levels, wavelengths, transition probabilities" link.
• NIST Physical Reference Data
  Series of large databases supllied by the USA's National Institute of Standard and Technology covering many areas of the physical sciences. The Atomic Spectroscopic Data (Version 2 interface) is the most useful for PIGLovers as it contains the "official" ("critically evaluated") values for Energy Levels and various Transition Parameters for a huge number of ions accessible via a WWW form interface. However some crucial ions (eg H-like species) are missing from the database.
• Atomic Line List
  Constructed & maintained by Peter van Hoof based on energy levels from the NIST database. Besides line energies (actually wavelengths) various Transition Parameters for a huge number of ions are accesible via WWW form interface (which can even provide the output in LaTeX format).
• The Opacity Project
  International collaboration to generate and provide atomic data for a range of astrophysical applications. Contents include Energy levels, Oscillator Strengths & Photoionization Cross Sections. WWW access provided via the TOPbase interface at the HEASARC. (see also the Iron Project (TIPbase)).
• The CHIANTI Database
  International collaboration to provide both atomic data & software for astrophysical applications. Data holding include Energy Levels, Oscillator Strengths, & Collision Strengths WWW Access via NRL (and elsewhere).
• The Plasma Gate
  Links to a v.large number of online databases hosted by The Weizmann Institute of Science, maintained by Yuri Ralchenko.

Other Useful Compilations etc