Discovered in ngc4128 by US amateur Patrick Wiggins 2018-09-28. This spectrum at mag 16.8 confirms it is a type I supernova, though the sub category, based on fitting this spectrum to known supernovae, is ambiguous, either Ic or Ia-91T-like
Yes I saw your image. These are really useful as it helps with finding the target and spotting useful nearby guide stars. It is annoying I could not pin down exactly what type it is. I have had some feedback from a professional using a different fitting program on my spectrum and he favours it being a type 1c. This would makes sense as a 1a-91T-like should be significantly brighter at this distance, though that could be down to extinction.. Hopefully I will get another go before it fades too much and perhaps it will have evolved enough to pin it down.