Five early TESS sectors support the 3.52-day signal at TOI-4450.02 with fixed times and local linear baselines

TOI-4450.02 has a catalog period of 7.04 days, with a stated half-period option. Earlier SPOC validation data and a public report already give the 3.52-day signal. This study tests fixed catalog times in five earlier TESS sectors from 2019 to 2020. A local linear baseline and an exposure-integrated box give a corrected TESS-SPOC mean depth of 205 ± 37 parts per million (ppm) across 33 accepted events. The 17 events between catalog epochs give 169 ± 51 ppm. All five sector estimates are positive. Omitting one sector gives means from 189 to 216 ppm. Five baseline or coverage choices give 201 to 211 ppm. At 85 shifted phases, the depth standard deviation is 42 ppm, and no test reaches the fixed-time mean. The tests are correlated and do not give a calibrated false-alarm probability. QLP gives a smaller corrected depth of 121 ± 41 ppm. The two early reductions share images. Their results cannot be combined as independent evidence. Later SPOC data give 208 ± 23 ppm across 47 events. The contribution is an event-level measurement set with explicit early/later and reduction checks. It does not establish a new period, confirm a planet, identify the host, or exclude two similar eclipses in a 7.04-day binary orbit. The package contains original archive files, provenance hashes, source code, tables, figures, and reproduction instructions.

TESS · TOI-4450.02 · TIC 373017346 · transit timing · period ambiguity · light curves · reproducible photometry