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   82125
   Iron K-alpha lines are our most direct probe of the black hole and
   accretion disk at the heart of AGN. So far, good profiles have been
   obtained only for the nearest Seyfert galaxies. We propose a 3 week
   observation of the bright quasar PG 0804+761, to obtain the first high
   SNR profile of a quasar. We thereby hope to understand the origin of
   the apparent changes in line profile with luminosity. We will
   simultaneously obtain the first high quality power spectrum of a
   quasar, seek to verify the existence of a warm absorber, and examine
   the time variability of the various spectral components.
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