  We calculate temperature profiles and X-ray spectra of accretion disks around
rapidly rotating neutron stars considering the full effect of general
relativity. Computed disk temperatures and luminosities are compared with the
EXOSAT data to constrain the properties of five low-mass-X-ray-binary sources.
We fit our model-spectra with an analytical function, which can in turn be used
for routine spectral fitting work. Our equation-of-state dependent spectral
model may be useful to constrain the equation-of-state models of neutron stars.
We also compare the properties of a rotating neutron star with those of a
rotating strange star with the hope of giving a possible way to identify a
strange star, which will be important for the verification of
strange-quark-matter hypothesis.
