Fig. 1
Left panel: NGC 4621 V-band image with the regions used for SBF and colour analysis. Thick-lined circles mark the borders of the main annulus, thin solid lines show the other annuli (as numbered), white boxes give the location of the SNe (see Sect. 2.2). Right panel: like the left, but for NGC 4374 (for sake of clarity the inner border of the main annulus is shown in white).
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