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Fig. 1


SDSS r-band images of 55 star-forming blue ETGs taken with 54s integration time. Note the faint features at the galaxy outskirts with shallow SDSS imaging. The S09 object identification number is given at the top of each image. The images showing the presence of recent interaction features in residual analysis are marked with D. All images are of the same dimension, and a line of length 15 is shown in the first image; this corresponds to the typical size of the galaxy.

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