Fig. 1.
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r-band images of the galaxy CIG 340 (IC 2487) from different surveys. Comparison between the Sloan Digital Sky Survey (left), the Legacy Survey (middle), and our data. The upper right value indicates the surface brightness limit [3σ, 10″ × 10″] of each image computed as explained in Sect. 2. The arrow in the left panel indicates the low surface brightness feature that is only visible in our data.
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