An updated compilation of supermassive black hole spin measurements from X-ray reflection shows no clear link to accretion rate and highlights needs for uniform samples and next-generation observations.
First long-term optical spectral monitoring of a binary black hole candidate E1821+643
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Spin Demographics of Active Supermassive Black Holes: Updated Estimates from X-ray reflection and Future opportunities
An updated compilation of supermassive black hole spin measurements from X-ray reflection shows no clear link to accretion rate and highlights needs for uniform samples and next-generation observations.