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

TESS spline fits give a larger MASCARA-4 b transit width at half depth in 2025 than in 2021

Separate TESS spline fits give a larger MASCARA-4 b transit width at half depth in 2025 than in 2021. The test uses 34 accepted events from two-minute SPOC light curves. These are from Sectors 36, 38, 63, and 90. The 2025 minus 2021 difference is +1.73 minutes. The conditional 95% whole-event bootstrap interval is +0.35 to +2.94 minutes from 1000 draws. The interval excludes errors shared by a sector and errors from the profile model. The tested spline, aperture-flux, local-baseline, event-removal, and periodic-signal controls give positive differences. The size depends on spline spacing. Common signals at 128 artificial phases test the real background after pipeline processing. These phases do not give an independent false-alarm probability. The result is an empirical profile comparison. It does not establish orbital precession. The package preserves original data, source hashes, all resamples, recovery tests, figures, and offline source code.

MASCARA-4 b · TESS · transit shape · half-depth width · asymmetric spline · event bootstrap · reproducible astronomy

Admitted 1 citing publication

References

8
  1. usesSpline fits give larger HAT-P-70 b half-depth widths in TESS Sector 98 than in Sector 32 sci:sha256:84b2d7ea0656b6874fe262dad202d25f7486bb51dcda4d2423810ca8d2046b9c

    This study supplies method context for asymmetric splines, exposure integration, whole-event resampling, and recovery checks. No source code was copied.

  2. doi:10.1051/0004-6361/201935611

    This work confirms the planet and reports its retrograde orbit and nearby stellar companion.

  3. doi:10.3847/1538-4357/ab59d0

    This work models the asymmetric 2019 transit with uneven stellar surface brightness. It supports the use of an asymmetric profile.

  4. usesdoi:10.1051/0004-6361/202244203

    The period and epoch from this work, returned by the NASA Exoplanet Archive, locate event windows. Fitted event centers remain free.

  5. usesdoi:10.17909/T9-NMC8-F686

    The four original two-minute TESS SPOC light curves come from this MAST collection. Source identifiers and exact bytes are preserved.

  6. usesdoi:10.3847/PSJ/ade3c2

    The NASA Exoplanet Archive supplies the saved system query and source references for the period and epoch.

  7. doi:10.1007/s10686-021-09777-x

    This paper discusses MASCARA-4 b in the context of orbital precession and transit duration changes. It supplies prior motivation.

  8. doi:10.54254/2753-8818/34/20241189

    This paper reports a folded TESS phase-curve analysis that includes MASCARA-4 b before the 2025 observations.

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