******************************************************
   PR #    54
   In Einstein OGS observation originally and in SSS--MPC observation, an
   absorption line, whose center energy is at 0.65 keV with delta E=0.1
   keV, was detected. Following the results obtained by Canizares &
   Kruper (1984) and other authors, Krorik et al. (1985) concluded that
   the absorption should be interpreted due to Ly alpha-like resonance
   line in ionized oxygen (O VIII) whose energy is centered at 654 eV in
   rest-frame, since the cosmological redshift of the host galaxy
   z=0.117. Madejeski et al. (1991) also confirmed the absorption feature
   with BBXRT.We are also interested in the spectral variability.Sembay
   et al. (1993) found a `soft lag' property in spectral variations from
   the Ginga results, and pointed out that the `soft lag' property
   supports synchrotron emissionmodel.
 ******************************************************