  Two-particle interferometry of positive kaons is studied in Pb + Pb
collisions at mean transverse momenta $<p_{T}>\approx 0.25$ and 0.91 GeV/c. A
three-dimensional analysis was applied to the lower $p_T$ data, while a
two-dimensional analysis was used for the higher $p_T$ data. We find that the
source size parameters are consistent with the $m_T$ scaling curve observed in
pion correlation measurements in the same collisions, and that the duration
time of kaon emission is consistent with zero within the experimental
sensitivity.
