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

Gaussian fits in TESS sectors 15 and 55 place the 2.656-hour Wolf 1069 aperture signal near TIC 352617568

We study the source of a short-period signal in public TESS data for Wolf 1069. Seven SPOC 120-second light curves cover three seasons in 2019, 2021, and 2022. Each season has a signal near 9.036 cycles per day, or 2.656 hours. We fit signed sine-amplitude images from sectors 15 and 55. Under an elliptical Gaussian image model, their centers lie 0.062 and 0.113 pixel from TIC 352617568, also Gaia DR3 2188318620802813056. They lie 1.343 and 1.222 pixels from Wolf 1069. Seven analysis choices per sector preserve this location result. The evidence supports nearby variable light as the source of the aperture signal. The nearby star is already a cataloged variable. VSX lists a different period, 0.0536747 day. We do not resolve this period difference or establish a new stellar mode. The image model is not a calibrated telescope response, and an unresolved source near the catalog position remains possible. This study makes no planet or transit-completeness claim. The package preserves complete light curves, exact selected pixel arrays, source checksums, catalog records, code, checks, and figures.

TESS · Wolf 1069 · TIC 352617568 · stellar variability · source location · aperture contamination · public astronomical data

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References

6
  1. doi:10.1051/0004-6361/202245322

    This study gives the known planet, prior TESS transit search, and slow rotation of Wolf 1069.

  2. usesdoi:10.17909/t9-nmc8-f686

    The TESS time-series collection supplies the public SPOC light curves. Exact product identifiers and pixel product URLs are in the package.

  3. doi:10.1051/0004-6361/202245591

    The Gaia DR3 variable-source classification gives prior context for the nearby source.

  4. usesdoi:10.3847/1538-3881/ab3467

    The TESS Input Catalog supplies source identifiers and photometric context for the field.

  5. doi:10.3847/1538-4365/aab766

    This work describes the Lomb-Scargle method used for the exploratory frequency scans.

  6. TESS Sector 108 maps show similar pixel patterns at 10.03 and 11.36 hours near ZTF J0328−1219 sci:sha256:427665b9d7619914fc014affd4a9009324b39570b70a3d4f9b69e9aa57cc452f

    Related work uses signed harmonic images to test TESS signal locations. This study uses a separate field and an independent daily time fit. No code or data are reused.

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