High-resolution threshold photoelectron-photoion coincidence spectra of ArXe were measured in the photon energy region 11.9-15.9 eV using the penetrating field technique and synchrotron radiation. Six vibrational progressions were observed and ascribed to the production of the six electronic states of ArXe+ ions (X 1/2, A(1) 3/2, A(2) 1/2, C-1 3/2, B 1/2, and C-2 1/2) via photoionization of the ground state ArXe dimer. The lowest vibrational level nu=0 of the ground X 1/2 state and some of the other vibrational levels were observed for the first time in the present measurements. The vibrational constants were obtained from observed vibrational energy levels. The dissociation energy of the ground state (X 1/2) was obtained as D-0(0)=1432+/-8 cm(-1).