Interference in vector meson production in Au + Au Collisions at $\sqrt{s}$ = 200 GeV from STAR

Photoproduction in Ultra Peripheral Collisions (UPCs) at the RHIC generates $\rho$ mesons. This occurs when a photon from one nucleus fluctuates into a quark-antiquark pair and scatters off the second nucleus producing a vector meson. The $t = p_T^2$ spectrum of the produced $\rho$ mesons, where t is the 4 momentum transfer squared, is sensitive to interference between the two possible production channels: the first nucleus emits a photon which scatters from the second nucleus, or vice versa. This interference is observed in the STAR data as a suppression in the $\frac {dN}{dt}$ spectrum at small t. In this talk, a measurement of the degree of interference will be presented as well as a discussion of systematic and statistical errors.