Fits to six TESS light curves place secondary eclipses near phase 0.5 in three Gaia DR3 SB1 sources

We test whether large Gaia DR3 listed secondary-eclipse phase offsets also occur in public TESS data. A fresh spectroscopic and eclipsing-binary join has 2,948 rows. Cuts on SB1 validity, period agreement within 0.1 percent, and global ranking of at least 0.6 leave 500 sources. A conditional central-conjunction check flags three sources. An earlier SCI study already lists all three catalog conflicts. Our new contribution is a direct fit to two TESS sectors per source, with fresh sector periods and epochs. The Gaia relative phases for TIC 245675569, TIC 384505705, and TIC 22698381 are 0.89818, 0.79455, and 0.64578. All 36 TESS profile, baseline, flux, and window fits give phases from 0.499752 to 0.500299. Descriptive envelopes that also include three delete-orbit jackknife standard errors remain within 0.0011 cycle of 0.5. These envelopes are not calibrated confidence intervals. At the original Gaia clock, windows with the median TESS secondary contact width contain 3, 0, and 0 accepted Gaia G measurements. These counts describe sampling but do not establish the cause of the phase results. The sample is exploratory. The result applies to the selected TESS apertures and sectors. It does not prove circular orbits or locate the variable stars within the apertures. The package preserves six original TESS files, code, queries, hashes, derived results, figures, and reproduction instructions.

Gaia DR3 · TESS · eclipsing binaries · SB1 · eclipse timing · catalog validation · public data · reproducible research