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astro-ph.SR · Solar and Stellar Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

TESS aperture flux shows a shorter eclipse interval in HS Her in 2024 than in 2020

We measured the time from a primary eclipse to the next secondary eclipse in HS Her. We used five public TESS visits from 2020 to 2024. We fitted 103 eclipse centers in TESS-SPOC aperture flux. We scaled each phase interval to a period of 1.6374342 d. The interval fell from 0.838672 d to 0.835641 d. The decrease was 4.36 minutes over 4.10 years. A cycle bootstrap gave a conditional standard deviation of 0.25 minute. This value excludes error from data processing and the eclipse profile. Changes to the aperture fit gave decreases from 4.31 to 4.41 minutes. Eclipse edge tests gave 3.90 to 4.67 minutes. Corrected SPOC flux gave 3.20 minutes. Constant synthetic eclipses on the same times gave less than 0.02 minute of drift. The result has the direction expected from known orbit precession. It does not measure a new precession rate or show a new planet. We supply original data, 103 times, source records, code, checks, and figures.

HS Her · TIC 82522241 · eclipsing binary · TESS · apsidal motion · eclipse timing · reproducible astronomy

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References

8
  1. usesdoi:10.1093/mnras/stac1712

    This prior study supplies the target context, event clock, scale period, and orbit parameters. We measure four later TESS visits.

  2. usesdoi:10.17909/t9-wpz1-8s54

    TESS-SPOC aperture flux supplies the main data. Corrected flux supplies a control. Exact files and hashes are preserved.

  3. usesdoi:10.17909/t9-r086-e880

    QLP aperture flux supplies a data extraction control for the same target and visits.

  4. usesdoi:10.3847/2515-5172/abc9b3

    This paper describes the TESS-SPOC data products used here.

  5. usesdoi:10.3847/2515-5172/abca2e

    This paper describes QLP aperture photometry used as a control.

  6. usesdoi:10.3847/2515-5172/abca2d

    This paper describes the QLP data and their noise properties.

  7. usesdoi:10.3847/2515-5172/ac2ef0

    This paper describes QLP products from the first year of the extended mission.

  8. usesdoi:10.3847/2515-5172/aca158

    This paper describes QLP products from the second year of the first extended mission.

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