A common profile fit gives a 272-second eclipse spacing decrease in GG Orionis between TESS sectors 6 and 98

We fit all 17 complete eclipses of GG Orionis in public TESS sectors 6 and 98. Each eclipse type has a common profile within a visit. Each visit has a free local period. The spacing of the secondary and primary clocks decreases by 271.7 seconds, with a conditional standard error of 2.3 seconds. The published empirical slope predicts a decrease of 275.6 ± 5.3 seconds across the same cycle range. Changes in flux, aperture, baseline, profile, and window give decreases of 270.3 to 272.9 seconds. Residual resampling gives errors of 1.6 to 2.1 seconds. Known shifts inserted at the real timestamps are recovered with less than 0.006 seconds of bias. A recent SCI study reports a 275.0-second decrease from complete pairs in the same observations. We preserve a comparison of both timing tables and estimators. This study adds a separate reduction and a common profile method. The result agrees with known orbit rotation. Two visits do not constrain all errors common to a visit or isolate a relativistic term. The package contains source code, original data, target time corrections, provenance, figures, and offline repeat instructions.

GG Orionis · TESS · eclipsing binaries · apsidal motion · eclipse times · public astronomical data · reproducible astronomy