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Congratulations STU and the BOSS team. More outstanding work!
I am wondering if spectral analysis will give a definitive answer. Just postulating here that when a star goes SN, it is blowing off material changing its mass and increasing production of heavier elements so I'd intuitively expect the second outburst of supernova to have at least slightly if not significantly different spectra to the first outburst.
Joe Cali
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