  The critical properties of the Ziff-Gulari-Barshad (ZGB) model with the
addition of long-range reactivity [C.H. Chan and P.A. Rikvold, Phys. Rev. E 91,
012103 (2015)] are further investigated. The scaling behaviors of the order
parameter, susceptibility, and correlation length provide addi- tional evidence
that the universality class of the ZGB system changes from the two-dimensional
Ising class to the mean-field class with the addition of even a weak long-range
reactivity mechanism.
