An RXTE Observation of the Seyfert 1 Galaxy MCG-6-30-15 : X-ray   Reflection and the Iron Abundance
  We report on a 50 ks observation of the bright Seyfert 1 galaxy MCG--6-30-15 with the Rossi X-ray Timing Explorer. The data clearly show the broad fluorescent iron line (equivalent width ~ 250 eV), and the Compton reflection continuum at higher energies. A comparison of the iron line and the reflection continuum has enabled us to constrain reflective fraction and the elemental abundances in the accretion disk. Temporal studies provide evidence that spectral variability is due to changes in both the amount of reflection seen and the properties of the primary X-ray source itself. 
J.C. Lee, A.C. Fabian, C.S. Reynolds, K. Iwasawa, W.N. Brandt