Are you sure?

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Paul Leyland

Are you sure that the same star was involved?

My understanding, which may well be wrong, is that the objects concerned were very close together on the sky but it’s far from certain that they were identically the same object.

A better example, perhaps, might by SN 1987A, aka Sanduleak -69 202.  There is absolutely no doubt there that the SN precursor had been studied by Sanduleak.