  We present an analysis of XMM-Newton and RXTE data from three observations of
the neutron star LMXB 4U 1636-536. The X-ray spectra show clear evidence of a
broad, asymmetric iron emission line extending over the energy range 4-9 keV.
The line profile is consistent with relativistically broadened Fe K-alpha
emission from the inner accretion disk. The Fe K-alpha line in 4U 1636-536 is
considerably broader than the asymmetric iron lines recently found in other
neutron star LMXBs, which indicates a high disk inclination. We find evidence
that the broad iron line feature is a combination of several K-alpha lines from
iron in different ionization states.
