https://www.legacysurvey.org//viewer/?ra=152.1346&dec=-0.6669&layer=ls-dr10-grz&zoom=14
The little red dot near the centre of the galaxy. It’s not in SDSS but shows up in the other layers and shows up in several single exposures.
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I took a good look at the single exposures and I dont believe it is one. there are a lot of single exposure images for this galaxy, most of them on the same day. I see in decam z band that it is fainter in the final exposure but its 2 years apart and SN’s arent believed to be visible for that long. Keep it up and youll find another SN.