# UTFANSWF Research Item 07 — JWST + Axion Coverage Cleanup

**Date:** 2026-08-17/18 (America/New_York)  
**Production status:** protected v23 18/18 PASS bundle not modified.

## JWST

The v23 bundle already hardened Row 20.4 correctly as a **diagnostic-record reproduction**, not a physical JWST validation. The archived eight-point UVLF pair reproduces

- chi2 = 5.511946476301458
- historical assumed n/nu = 8
- chi2/8 = 0.6889933095376822
- RMS residual = 0.10348530589493715

The executable explicitly records that no standalone acceptance threshold existed in the archived run, the full UVLF/SFRD/stellar-mass/sizes/lines pipeline was not executed, and physical JWST status remains OPEN. The historical manuscript headline `chi2/nu = 1.102` is not reproduced by the surviving executable artifact and must remain historical rather than silently substituted.

Current primary-source observations are substantially richer than the archived eight-point diagnostic. The audit record pins representative current sources: PRIMER (arXiv:2403.03171), JADES DR5 (arXiv:2601.15959), and a 2026 wide-area 12.5<z<18.5 UVLF analysis (arXiv:2604.16666). A current physical UTFANSWF JWST test therefore requires a new frozen data vector/covariance and a source-complete execution of the declared theory map. Merely observing galaxies at z~8-15 is not a unique confirmation of UTFANSWF.

## Axion

The public rounded prediction/search band remains `6-60 ueV`; the underlying standard relation gives unrounded endpoints `5.7-57 ueV`. The shipped v23 root comparison files cover only `10-60 ueV`, and v23 already refuses to fabricate `6-10 ueV` limit data.

The current primary-source audit finds no full DFSZ-like exclusion of the 6-60 ueV window in the cited results. Representative in-band searches include HAYSTAC Phase II (arXiv:2409.08998), CAPP18T (arXiv:2308.09077), and RADES (arXiv:2403.07790). ADMX has demonstrated DFSZ exclusion at 3.27-3.34 ueV (arXiv:2408.15227), below the UTFANSWF band.

The important cleanup is provenance/labeling: the shipped smooth `axion_limit95.csv` is an archived comparison coordinate table, not a self-updating source-pinned experimental envelope. Therefore its `context: LIVE` should not be interpreted as proof that every current experiment has been ingested. A future live gate must pin experiment-specific source versions, mass intervals, confidence levels, halo assumptions, and coupling conventions before recomputing coverage.

## Verdict

`PASS_AXION_BAND_REMAINS_OPEN__PASS_JWST_DIAGNOSTIC_REPRODUCTION__PHYSICAL_JWST_VALIDATION_AND_LIVE_DATA_PINNING_OPEN`

This is a claim-boundary cleanup, not a new validation claim. No production threshold was relaxed, no target was fitted, and the protected v23 production bundle was not changed.
