A 5 km/s error floor leaves 2 of 52 AWES curves above the Kepler ratio with an error multiplier of 3.9214 and 5-degree angle bounds

We test outer gas speed ratios in the public AWES release of 568 galaxies. A fixed selection leaves 52 curves. For each curve, we use the last measured ring and the first ring at or beyond half its radius. We bound Q=(r2/r1)(v2/v1)^2, for which a circular Kepler speed law requires Q=1. The speed bounds use 3.921421 listed errors. We allow an independent 5-degree inclination change at each endpoint through a sine rescaling at fixed radii. Twelve lower bounds exceed one. Adding a 5 km/s error floor in quadrature reduces the count to two: IC 284 and UGC 1886, with bounds 1.1774 and 1.0295. Angle bounds of zero and ten degrees give 29 and six flags with the original errors. A union-bound proof gives at least 95% simultaneous coverage across all 568 endpoint pairs. This claim assumes Gaussian marginal errors with zero bias and standard deviations equal to the listed errors. Radii and reported geometric estimates are fixed. No error independence is required. The source error calibration is not established, so the exclusions are conditional interval results. Gas rotation need not equal circular speed. The test does not identify a mass model or a new physical anomaly. The package contains the source tables, provenance, selection ledger, per-galaxy bounds, code, figures, and independent numerical checks.

AWES · Apertif · galaxy rotation curves · neutral hydrogen · Kepler speed law · inclination · measurement errors · simultaneous bounds · reproducible astronomy