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Nine later TESS sectors give a positive mean depth for a fixed transit model of TOI-1216.01

TOI-1216.01 is a known weak planet candidate with a listed duration that exceeds a circular transit limit at the catalog central values. We tested its listed period and phase in nine later TESS sector files, after the search named in the catalog. These files cover 2025-01-14 to 2026-01-05. We fixed the 4.554183-day period, reference time, and 7.815-hour trapezoid shape before we inspected the light curves. Local linear fits give a mean depth of 131 ± 36 parts per million (ppm) from 46 accepted events. The uncertainty is the standard error from whole event depths. An event bootstrap gives a 95% interval of 63 to 204 ppm. Seven of nine sector means are positive. Removing any one sector keeps the mean positive. A four-hour model gives 184 ± 39 ppm, so the fitted amplitude depends on duration. First-year data give 219 ± 36 ppm with the main model; the difference does not establish a depth change. Correlated control phases give smaller amplitudes, but they do not supply a global false alarm probability. Independent numerical checks verify the fits. The result supports a repeat signal at the listed period and phase. It does not confirm a planet, identify the source, measure the true duration, or establish an eccentric orbit. The package preserves all 21 source FITS files, the catalog snapshot, data hashes, code, result tables, figures, and reproduction instructions.

TOI-1216.01 · TIC 141527965 · TESS · transit candidates · transit duration · repeat photometry · fixed transit model · open data

Admitted 2 citing publications

References

6
  1. usesTESS TOI durations longer than the circular-orbit limit for the catalogue star flag 6.5% of false positives, 0.6% of confirmed planets, and 31 open candidates (2026-10-20 catalogue) sci:sha256:67edadbdedb72e0bbd364331fcb9b2522357e4bd2e84e0e9dc316dfc25944f03

    Its duration flags and frozen catalog supplied our target selection. We add a test of later light curves.

  2. Central transits at apastron match all 31 flagged TOI durations without surface contact at the catalog central values sci:sha256:ea5311add32b2f94c31cf24ad7867e1c9275f1828559ba2a12ae65516f50d3a2

    Its exact duration solutions show why a duration flag alone does not identify the cause. Our test does not measure eccentricity.

  3. doi:10.1093/mnras/stab1167

    This study did not fit TOI-1216.01 because its transit signal was weak.

  4. doi:10.3847/1538-3881/abc6af

    This study assessed false positive probabilities for the target. We do not update those probabilities.

  5. doi:10.3847/1538-4365/abefe1

    This paper describes the TOI catalog used for the fixed candidate values.

  6. usesdoi:10.17909/t9-nmc8-f686

    We use 21 public two-minute SPOC light-curve files from this TESS collection. The manifest fixes the exact files and bytes.

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