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   62048
   We propose to use ASCA and RXTE to conduct simultaneous spectral and
   fast timing observations of neutron star low-mass x-ray binaries. Our
   recent results on 4U 0614+091 show that a soft blackbody component of
   the x-ray spectrum has a robust correlation with the frequency of the
   fast QPOs. Simultaneous ASCA and RXTE observations will allow us to
   extend these results to lower intensity states and to other sources
   where the blackbody cannot be reliable detected with RXTE alone. Joint
   spectral and timing data should lead to important new information on
   the behavior of accretion flows in neutron star LMXBs.
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