There is a possible Supernova (Possible Supernova PSN J13051112-4931270) in NGC 4945 and a confirmation image by Joseph Brimacombe from Cairns Australia is now available.
Actual Confirmation will be forthcoming
Here I have added my NGC 4945 image to Joseph's confirmation image to show where it wasn't (if you know what I mean).
Mine is the colour image on left showing where the SN isn't. Joseph's on the right shows where it is.