Fig. 6

Spitzer IRAC image of NGC 5523 at 3.6 μm, displayed in a log scale. Figure 6 functions as a reference for distance measurements in Table 5. Points A and B denote the apsides of the outer disk, and similarly points C and D denote those of the inner disk. The Brightness Maximum indicates the center of the nucleated bulge and the Brightness Minimum describes the isophotal center of NGC 5523. The major axis runs east-west with east at the right edge of the image and north at the bottom edge.
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