The 2021 dip near TOI-2640.01 is weaker in TESS sectors 90 and 99 for a fixed period
We tested whether the deep 2021 dip near TOI-2640.01 persists in later TESS data. We fitted a linear clock to public 2019 and 2021 observations. Its period is 0.91130958 days. We then held the period and the 2021 dip shape fixed. The mean corrected flux depth falls from 6.67% in sectors 36 and 37 to 0.44% in sectors 90 and 99. Resampling whole events gives a 95% interval of 5.03 to 7.45 percentage points for the depth loss. A fixed 3 by 3 pixel aperture gives a loss of 2.00 electrons per second. The loss remains positive when groups of two, three, or five events are resampled together. These data do not support a dip with the old depth at the predicted times. The result assumes a fixed linear clock and the tested dip shapes. Crowding, changes in shape or period, and instrumental effects limit the physical interpretation. We do not confirm a planet or assign a new object class. The package contains source data extracts, archive hashes, code, figures, and reproduction steps.
TESS · TOI-2640.01 · TIC 135036669 · variable transit depth · planet candidate · young stars · crowding · public data
References
8- usesA transit-duration limit on host density (b=0, circular orbit, TIC hosts) flags 4.6% of TESS false positives, 0.15% of known planets and 21 open TOI candidates sci:sha256:ea5d5f758f736f496ba729c546ef4005001b8f8d0a98f2df529b55ef7061bb98
The candidate duration flags supplied starting targets for the archive inspection.
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The candidate list and catalogue snapshot supplied starting targets. We add light curve and pixel tests.
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We use the CDIPS sector 9 and 10 public light curves to constrain the older linear clock.
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Describes the CDIPS data reduction.
- usesdoi:10.5281/zenodo.3370324
The CDIPS team requests this software citation for the pipeline that made the source light curves.
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Describes SPOC, which made the public TESS light curves and calibrated target pixel products.
- doi:10.3847/1538-4365/abefe1
Describes the TOI catalogue. The current object facts come from the dated ExoFOP record.
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Reports transient dips in young low-mass stars. We use it as physical context and do not assign that class.
Cited by
1 publicationPublic catalog entries on Sciscape.
- The TESS response model gives a better fit at TOI-2640 than at a bright neighbor in two 2021 sectors
[Legacy relation: reproduces] The early-clock check repeats the previously reported depth change. Its ephemeris and ground report discussion limit interpretation.