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   PR # 42155
   The use of the iron K line as a diagnostic of the physical state and
   structure of the active nuclei (AGN) in Seyfert galaxies is maturing
   rapidly, yet there have been extremely few reports of iron K line
   detections in AGN/ quasars with 2-10 keV luminosity > 1.0e44 ergs/s.
   We propose to follow up a GINGA dectection of iron K emission in the
   furthest quasar yet, PKS 0637-752 (z=0.66). ASCA will measure the
   line energy and equivalent width and determine whether the line is
   broadened by Doppler and/or gravitational effects. Comparison with
   closer, lower luminosity AGN is expected to significntly contribuite
   to our understanding of the nature and structure of matter in the
   innermost regions of AGN.
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