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0. Seems there are a half dozen other SMBHs also close to the theoretical limit. What's novel about this discovery?

1. Is the Great Attractor a SMBH > 1e10 M(.)?

I think the novelty here is the way of discovery, at least that is how I read the paper.

Ah thanks for the elucidation. I'm too ignorant in this subject area to compare or contrast this paper with the corpus of literature from any point of expertise or reference.

The Great Attractor is likely a cluster of galaxies with lots and lots of SMBHs.

I wonder about inflation vs. gravity of these massive structures.

"Locally" in the supercluster scale, I'm wondering to what degree gravity swamps dark energy inflation.

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