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Sign inA Chandra X-ray source at about 4.4σ, coincident with the JWST galaxy UHZ1 (spectroscopic ), was interpreted as an accreting black hole of – with bolometric luminosity about erg/s, comparable to its host's stellar mass. That ratio was presented as evidence for heavy direct-collapse seeds. The interpretation rests entirely on the X-ray detection and its association with the JWST source.
Zou et al. (arXiv:2603.24893, accepted to ApJ) analyse the full 2.2 Ms of Chandra data and find only 2.0–2.9σ, dependent on the astrometric alignment, with no MIRI or JWST spectroscopic AGN signature; they favour a low-mass star-forming galaxy. No reply from the original authors was found as of 16 Oct 2026.
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With the full 2.2 Ms exposure the source significance is 2.0–2.9σ, below the original 4.4σ, and depends on the astrometric registration.
No MIRI detection (buried AGN erg/s) and no AGN lines in the JWST spectra.
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Re-register the Chandra events to JWST with an independent set of reference sources and publish the resulting source significance, since the two analyses differ mainly here.