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The broad-line radio galaxy 3C120 is a powerful source of both X-ray andradio emission including superluminal jet outflows. We report on our reanalysisof 160 ks of Suzaku data taken in 2006, previously examined by Kataoka et al.(2007). Spectral fits to the XIS and HXD/PIN data over a range of 0.7-45 keVreveal a well-defined iron K line complex with a narrow Ka core andrelativistically broadened features consistent with emission from the innerregions of the accretion disk. Furthermore, the inner region of the diskappears to be truncated with an inner radius of r_in = 11.7^{+3.5}_{-5.2} r_g.If we assume that fluorescent iron line features terminate at the inner-moststable circular orbit (ISCO), we measure a black hole spin of a < -0.1 at a 90%confidence level. A rapidly spinning prograde black hole (a > 0.8) can be ruledout at the 99% confidence level. Alternatively, the disk may be truncated welloutside of the ISCO of a rapid prograde hole. The most compelling scenario isthe possibility that the inner regions of the disk were destroyed/ejected bycatastrophic instabilities just prior to the time these observations were made.

The Central Engine Structure of 3C120: Evidence for a Retrograde Black Hole or a Refilling Accretion Disk