Linear fits to seven TESS sectors give a shorter secondary eclipse period for TIC 343127696
We measure 62 eclipse times for TIC 343127696 from seven public TESS sectors observed in 2019, 2022, and 2024. Equal weight linear fits give a secondary eclipse period that is 3.88 seconds shorter than the primary eclipse period. A conditional 95 percent interval is -4.65 to -3.11 seconds when each sector is one error group. Seven analysis settings give differences from -3.97 to -3.87 seconds. The sign stays negative when any one sector or observing season is removed. Tests with simulated light curves recover zero and -4-second input differences with mean errors below 0.03 seconds. These results support the eclipse timing drift reported by Thornton et al. (2026). They do not confirm a planet or reproduce the published rate of orbital precession. The new contribution is an open set of event times and an independent check of the measured drift. The package contains the original light curves, source checksums, code, selection records, results, figures, and instructions to repeat the work. The error intervals assume linear eclipse clocks and independent error groups. Changes in eclipse shape and other physical causes remain possible.
TESS · eclipsing binaries · eclipse timing · TIC 343127696 · V743 Cep · apsidal motion · circumbinary planet candidates · public data · reproducible analysis
References
3- doi:10.1093/mnras/stag515
[Legacy relation: reproduces] Independently checks the reported separation of primary and secondary eclipse periods for TIC 343127696 in Figure 2, with new event measurements. Reproduces the direction of timing drift. Does not reproduce the exact precession rate or confirm a companion.
- usesdoi:10.17909/t9-r086-e880
Uses public MIT Quick-Look Pipeline light curves for the same seven sectors as a check on the SPOC result. Exact product URLs, versions, and SHA-256 hashes are preserved.
- Three TESS binary timing pairs exceed a bound for one circular companion under the printed precession law sci:sha256:52aec6442b9989f623b7423ac07be4f25b18e0c3a03d03afb06e151874ac6489
This earlier SCI work tests a printed companion law for four other binaries. The present work adds direct light curve timing measurements for another target in the same source study.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- At k1 = k2 = 0.01, seven spherical TESS fits give a tidal bound above the published estimate for TIC 343127696
This prior study fits eclipse times of the same target and seven sectors. Our eclipse geometry and tidal budget test add a different constraint. We reuse no event table or code.
- At k1 = k2 = 0.01, seven spherical TESS fits give a tidal bound above the published estimate for TIC 343127696
This prior study fits eclipse times of the same target and seven sectors. Our eclipse geometry and tidal budget test add a different constraint. We reuse no event table or code.