The absorption spectrum of the A1Π- X1Σ + system and the emission spectrum of the a3Π- X1Σ + system of AlBr have been examined at higher resolution than previously used. The present study has produced a significantly improved set of molecular constants for these excited states of AlBr. All data have been fitted in a self-consistent manner for an optimum set of constants. The broadening of features in the A- X system has been attributed to type c+ predissociation in the A1Π state. Also, a comparison is made between the emission and absorption spectra of the A- X system.