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astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

Three TESS dips toward TOI-1895.01 select a 74.8-day period under a constant transit model

We test the period of TOI-1895.01 with eight public TESS light curves. Two known dips are 748.074960 days apart. A third dip in Sector 100 in 2026 fits cycles 0, 10, and 33 at a period of 74.807529 days. The formal period error is 0.000034 days. We test all 748 integer aliases with periods of at least one day. The third time rejects 674 aliases. Missing repeats reject 73 shorter aliases if repeats have the nominal 5.11-hour shape and at least 2155 ppm depth. The weakest exclusion is 5.15 empirical noise units in corrected flux and 6.61 units in raw aperture flux. These units have no calibrated false alarm probability. Local injection tests recover 78 to 100 percent of the added signal. The Sector 100 image offset depends on whether pointing terms are included. Thus the period result assumes a common source and a constant transit model. It does not confirm a planet or assign the source. With the stellar values in a prior candidate table and negligible companion mass, this period gives 0.373 AU. The flux at that distance is about 21 times Earth's flux. That table's habitable-zone assignment does not apply under this model. The package contains source code, the light curves, event pixel cutouts, archive hashes, test tables, figures, and reproduction instructions.

TESS · TOI-1895.01 · TIC 384159646 · period aliases · transit timing · public astronomical data · source identification · habitable zone

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References

7
  1. doi:10.1093/mnras/staa3739

    This paper reports the original Planet Hunters TESS candidate and its Sector 12 dip. We use that known event and later public data.

  2. doi:10.3847/1538-3881/ad3068

    This paper states that TOI-1895 has an uncertain period and gives 748.07 days as an upper limit. We test that known ambiguity with a later event and measured data coverage.

  3. challengesdoi:10.48550/arXiv.2512.00967

    For TOI-1895.01 alone, the tested common-source model gives a 74.8-day period. With the stellar values in Table 6 of version 1, it gives 0.373 AU. The habitable-zone assignment in that entry then does not apply. This result does not establish a planet or challenge the rest of the classifier study.

  4. TESS 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

    This related SCI study uses an event gap divided by an integer and missing repeats to test period aliases. We wrote independent code for a different target.

  5. usesdoi:10.17909/t9-nmc8-f686

    We use the public 120-second TESS SPOC light curves for TIC 384159646 in Sectors 12, 13, 39, 66, 93, 100, 101, and 102. The package preserves exact product identifiers, retrieval times, and hashes.

  6. usesdoi:10.17909/t9-yk4w-zc73

    We use TESS target pixel files for Sectors 12, 39, and 100 to test the dip source. The package has lossless event cutouts, extraction code, and hashes of the full products.

  7. usesdoi:10.5270/esa-qa4lep3

    We preserve an auxiliary Gaia DR3 field query. It is not used to exclude blends or assign the transit source.

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