Fig. 10.
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Image cutout centered on the position of SN 2021hem, taken on 9 September 2023 with the GTC equipped with OSIRIS. The final image is a stack of eight individual exposures, with a total integration time of 435 seconds. The location of the SN and the nearby diffuse extended feature is marked. An isophote is shown (green contour) enclosing the diffuse feature.
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