  The connection between the coronal lines and the warm absorber is examined
systematically. In an earlier work it was found that the coronal line emitting
plasma and the warm absorber gas share the same density and temperature. If
there is a connection between the warm absorber gas and the forbidden
high-ionization line (FHIL) plasma, one can use the profiles of coronal lines
to derive the kinematics and dynamics of the warm absorber due to the high
spectral resolution available in the optical range. Further support for a
connection is a correlation between the equivalent width of [Fe X] 6375 and the
ROSAT spectral index found for an optically selected sample. For X-ray selected
objects with absorption edges observed by ASCA, we looked for a correlation
between the coronal lines and the warm absorber gas. A direct correlation
cannot be confirmed.
