Three TESS events at TOI-125 fit a 49.06-day repeat period under a constant-period model
Three dips in seven public TESS two-minute light curves of TOI-125 fit a repeat period of 49.06034 days. This result assumes that one source caused all three events and that its period is constant. The Sector 69 dip is the single event now listed as TOI-125.04. We link it to dips in Sectors 2 and 96. Their corrected-flux depths are 805 to 896 parts per million, and their durations are about four hours. Separate transit fits give a conditional period error of 0.00019 days. Aperture flux and alternative baselines give similar times, but the Sector 2 depth depends on the flux correction. We test alternative cycle counts with observed coverage and missing-event fits. Combined missing-event tests reject all 152 alternative central trials that predict extra covered events. These tests assume a stable transit shape, at least half the measured depth, and independent extra-event windows. A position change crosses the Sector 69 event. Linear position terms change its fitted depth by less than six parts per million, but image checks do not identify the host. The exploratory search has no measured probability of a false alarm for the full search. This work does not confirm a planet. The package has source light curves, event pixels, source hashes, catalog snapshots, code, tables, and figures.
TOI-125 · TIC 52368076 · TESS · single transit · transit timing · period aliases · public data
References
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The first system report also defines a different historical .04 signal. We distinguish that signal from the current single-event entry.
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Mass measurements and prior study of the three confirmed planets.
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We compare event times with the three known-planet ephemerides in Table 3 of version 1 and state its reported transit timing changes.
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Prior methods for period constraints from sparse TESS transits.
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Prior work on TESS two-event candidates and period ambiguity.
- usesTESS Sector 96 shows a second transit of TOI-790.03, 726.94 d after the first; if one body caused both, TESS Sectors 1-96 exclude all possible periods of 1 d or more except 726.94 d and 363.47 d sci:sha256:a5131355b9615ad61701e5d9153c945a9c7131afa9f7fc74727e0c5924dba0c6
We use its half-depth missing-event threshold as a method reference. We write new code and measure a different target.
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We use public light curves and target pixel files from the TESS Science Processing Operations Center.
- usesdoi:10.26134/ExoFOP5
The 2026-10-21 ExoFOP-TESS snapshot supplies the current single-event candidate record and catalog context.
Cited by
5 publicationsPublic catalog entries on Sciscape.
- usesTests of two TESS dips at TOI-4187 retain five periods of at least 10 days if one stable source causes both
We use its local missing-event checks as a method reference. We write separate code and test a different target.
- usesLinear pointing terms shift the fitted TOI-125 Sector 69 source offset by 1.06 pixels
We use its three TOI-125 event centers and durations. We add numerical source fits, model tests, and known-planet controls to its unresolved image checks.
- usesSupport for a circular 49.06-day signal at TOI-125 depends on HARPS calibration cuts and noise models
We use its period, transit epoch, covariance, and event times to define the circular radial velocity phase. We do not refit its photometry.
- usesCorrelated noise weakens the 49.06-day circular orbit test in two public TOI-125 HARPS reductions
We use its proposed 49.06034-day period, transit epoch, and timing covariance to test public radial velocities. We retain its unresolved source and constant-period assumptions.
- A fixed transit test leaves 29 periods of at least one day for the two known TOI-5696.01 events
This prior result removed TOI-125 from the exploratory novelty search.