  X-ray ionized reflection occurs when a surface is irradiated with X-rays so
intense that its ionization state is determined by the ionization parameter xi
propto F/n, where F is the incident flux and n the gas density. It occurs in
accretion, onto compact objects including black holes in both active galaxies
and stellar-mass binaries, and possibly in gamma-ray bursts. Computation of
model reflection spectra is often time-consuming. Here we present the results
from a comprehensive grid of models computed with our code, which has now been
extended to include what we consider to be all energetically-important
ionization states and transitions. This grid is being made available as an
ionized-reflection model, REFLION, for XSPEC.
