Supernova (SNII ?) candidate in LSB

http://legacysurvey.org/viewer?ra=175.7455&dec=-1.4841&zoom=16&layer=decals-dr5

seen earlier in http://archive.eso.org/hdr?DpId=ADP.2016-10-05T16:53:15.566
discussed in https://talk.galaxyzoo.org/#/subjects/AGZ000dt2p