Left: map of T_e derived from the magnitude of the Paschen continuum jump at 8250 Å ratioed by the dereddened H I Paschen 11 (8862.8 Å) emission line strength. Initial estimates of T_e and N_e from the [S III] and [Cl III] ratio maps were applied; see text for details. Low T_e values over the two bright stars in the field (central star and field star to south-west) are produced by the stellar continua mimicking a low T_e. Centre: map of the average temperature, T0. Right: map of the temperature fluctuation parameter, t². Both were determined from the map presented in the left column and the T_e ([S III]) map shown in Fig. 4.