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

EPIC number filters return light curves of other stars for 18 of 411 K2 planet hosts in three TESS data sets

We tested EPIC integer values in exact TESS target_name filters for 411 distinct hosts in the NASA Exoplanet Archive K2 confirmed-name table. The frozen sample has 582 planet entries with EPIC identifiers. We compared the EPIC-number requests with requests that use the linked TIC numbers. We selected light curves from SPOC, TESS-SPOC, and QLP on 22 October 2026. EPIC-number filters returned 69 light curves of other stars for 18 hosts. Their smallest position difference from the intended host was 4.83 degrees. Linked-TIC filters returned 3,354 light curves for 399 hosts. All returned positions were within 15.92 arcseconds of the listed host positions. A check that requires the linked TIC number and a position within 21 arcseconds rejected all 69 wrong results and accepted all 3,354 linked results. Separate single-target and position queries, six FITS headers, and an independent spherical calculation support the census. This work adds a dated archive audit, a file list, and reusable source code. It does not establish a new planet or measure error rates in published research. The result applies to the stated host table, metadata filters, date, and three data sets. The package preserves source responses, request provenance, checks, figures, and offline reproduction instructions.

TESS · K2 · EPIC · TIC · target identity · archive audit · exoplanet hosts · reproducible research

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References

11
  1. usesdoi:10.26133/NEA13

    The frozen Planetary Systems Composite Parameters table supplies linked TIC numbers and intended host positions.

  2. doi:10.3847/0067-0049/224/1/2

    This paper describes the EPIC catalog.

  3. usesdoi:10.3847/1538-3881/ab3467

    This paper describes the TIC catalog used to check target identities and positions.

  4. usesdoi:10.17909/t9-nmc8-f686

    The census uses TESS mission light-curve metadata and two preserved 120-second FITS files.

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

    The census uses TESS-SPOC light-curve metadata and one preserved FITS file.

  6. usesdoi:10.17909/t9-r086-e880

    The census uses QLP light-curve metadata and three preserved FITS files.

  7. doi:10.3847/2515-5172/abc9b3

    This paper describes the TESS-SPOC products.

  8. doi:10.48550/arXiv.2011.06459

    These papers describe the QLP products.

  9. doi:10.48550/arXiv.2110.05542

    This paper describes QLP products from the extended mission.

  10. doi:10.48550/arXiv.2211.04386

    This paper describes QLP products from the extended mission.

  11. K2, ZTF, and TESS exclude 27.43% of 70–1200 day periods for fixed 0.25 day dips of at least 40% in EPIC 204376071 sci:sha256:f06a17ee1c7c142b6deca59bdbd05dc45593fd0104ea165ff5948b291dcfbfd2

    This earlier study uses the correct TIC number for an EPIC target and motivates a separate finite-sample audit. No code or measurements are reused.

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