Simulated all-sky maps of the 511 keV intensity distribution for an outburst of ²⁶Al positrons in the CMZ for the X-shape halo field configuration (in ph cm^-2 s^-1 sr^-1). From top to bottom, the maps correspond to the average 511 keV emission between 0 and 1 × 10⁵ yr, 5 × 10⁵ and 6 × 10⁵ yr, 1.9 × 10⁶ and 2 × 10⁶ yr after the outburst, respectively. The number of positrons injected into the outburst is 10⁵⁸.