  Recent polarized proton experiments at Brookhaven National Laboratory are
used as a basis for a model of the energy dependence of the analyzing power of
proton-carbon elastic scattering. In addition to their practical value for
polarimetry, the results of this analysis give constraints on the size of the
Pomeron spin-flip coupling as well as information on the $f_2$ and $\omega$
spin-flip couplings.
