Two-dimensional temperature distribution as fitted in each of 13 apertures. Colors at the edge of each circle match those given by the aperture definitions in Fig. 5. Temperatures within the polar extension remain high even at large distances from the center when compared to the “disk” apertures. The contours are at [5, 10, 20, 40, 80] times the continuum image error and scaled to the power of 0.65 (see Fig. 4).