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We present a detailed X-ray study of the 2003 XMM-Newton observation of theHigh Mass X-ray Binary XTE J0421+560/CI Cam. The continuum of the X-rayspectrum is well described by a flat power law (Gamma=1.0+/-0.2) with a largeintrinsic absorbing column (N_H=(4.4+/-0.5)\times10^{23} cm^{-2}). We havedecomposed the broad iron line into 3 separate components:Fe\textsc{i}-K$\alpha$, Fe\textsc{i}-K$\beta$ and Fe\textsc{xxiv-xxv}K$\alpha$.It is unclear how both neutral and almost fully ionised iron can existsimultaneously, however we suggest this could be evidence that the compactobject is embedded in the circumstellar material. This doesn't appear to beconsistent with the X-ray flux and spectrum of the source, which has remainedessentially unchanged since the initial outburst. The iron abundance implied bythe ratio of the neutral Fe-K$\alpha$ and Fe-K$\beta$ is compatible with solar.We search for lags in the neutral Fe-K$\alpha$ with respect to the continuumand find marginal evidence for a lag at ~10 ks. We interpret this as the lightcrossing time of the torus which would suggest that the neutral iron is locatedat a radius of 10 AU. This result depends on several assumptions including thedistance to the system, the inclination, the mass of system and the orbitalperiod none of which are known with any great certainty. Better constraints onthese system parameters and further observations of this system are required toconfirm this result. We discuss the nature of this system in light of ourresults and place it in context with other binary B[e] stars.

Timing and Spectral Analysis of the Unusual X-Ray Transient XTE J0421+560/CI Camelopardalis