Fig. 1.
Left panel: VST color-composite gr image of the 20.7 arcmin × 19.4 arcmin field around PGC 7748. Top right panel: azimuthally averaged surface brightness profiles in the g (blue) and r (red) bands. Bottom right panel: azimuthally averaged (g − r) color profile. The vertical dotted and dashed lines mark the position of the first and second transition radii, respectively, and the gray shaded areas are the transition regions (see Sect. 5).
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