  CHIANTI contains a large quantity of atomic data for the analysis of
astrophysical spectra. Programs are available in IDL and Python to perform
calculation of the expected emergent spectrum from these sources. The database
includes atomic energy levels, wavelengths, radiative transition probabilities,
rate coefficients for collisional excitation, ionization, and recombination, as
well as data to calculate free-free, free-bound, and two-photon continuum
emission. In Version 9, we improve the modelling of the satellite lines at
X-ray wavelengths by explicitly including autoionization and dielectronic
recombination processes in the calculation of level populations for select
members of the lithium isoelectronic sequence and Fe XVIII-XXIII. In addition,
existing datasets are updated, new ions added and new total recombination rates
for several Fe ions are included. All data and IDL programs are freely
available at http://www.chiantidatabase.org or through SolarSoft and the Python
code ChiantiPy is also freely available at
https://github.com/chianti-atomic/ChiantiPy.
