TESS sectors 3 and 29 do not confirm a reported 3.8-ppt box signal near 10.72 days on TIC 43375040

We tested a weak TESS signal on TIC 43375040 with earlier data and local baseline fits. The source reported depth 3.78 ppt, duration 3.975 h, and period 10.7203 d. It did not claim a planet. We searched sectors 3 and 29 with QLP and TESS-SPOC flux products. We tested periods of 10.4 to 11.1 d, with free phase and the fixed source duration. With a 1.0-d median filter, the strongest corrected-flux boxes have depths of 1.10 to 1.63 ppt. We inserted source-depth boxes before our trend removal at 100 phases for each of three periods. In both corrected Sector 29 products, all 300 inserted signals scored above the real-data maximum. Period and overlap recovery was 278/300 for TESS-SPOC and 292/300 for QLP. Sector 3 has more sampling loss. Raw QLP gives a similar test. Raw TESS-SPOC results depend strongly on the trend window and give poor recovery in Sector 29. In Sector 107, only 27% of the first expected box has accepted exposure. Across 12 baseline models, its raw depth ranges from -0.93 to 3.20 ppt. Its corrected depth ranges from 3.44 to 5.06 ppt. These tests do not confirm the reported periodic box. They do not exclude shallower planets, other durations, timing changes, or period aliases. Injection scores are sensitivity measures, not false alarm probabilities. The package preserves five FITS inputs, provenance, original code, all results, six figures, and reproduction instructions.

TESS · TIC 43375040 · transit vetting · box least squares · injection recovery · sampling gaps · light curves · null result