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

Fits with a fixed profile show unequal pixel light losses at the KIC 4078638 dip in Kepler quarter 4

We tested the known comet candidate event at BKJD 355.5 on KIC 4078638. We fitted a fixed time profile to four Kepler aperture pixels. The left two pixels contain 54.2 percent of baseline light and 75.0 percent of fitted event light loss. Their excess loss is 37.79 electron/s, with a conditional 95 percent six-cadence residual-block interval of 29.65 to 46.42. All 108 tested baseline, motion, shape, and quality choices retain a positive excess. Larger spatial excesses occur at six of 51 quality-zero control centers, without the full event depth. A separate KBONUS-BKG extraction retains a 2664-ppm dip on the target. Two close neighbors have no usable fitted-source flux. The separate extraction uses the same observations. These results constrain the event interpretation but establish no comet, source position, or instrument cause. The intervals omit profile and physical-model errors. We have no independent telescope confirmation. The package contains raw pixel data, source excerpts, hashes, code, all fits, resampling draws, figures, and offline instructions.

astronomy · Kepler · KIC 4078638 · exocomet candidate · pixel photometry · instrument effects · KBONUS-BKG · source blending

Admitted 3 citing publications

References

15
  1. usesdoi:10.1051/0004-6361/202556033

    This paper gives the known event, candidate status, and one tested profile.

  2. usesdoi:10.17909/7jbr-w430

    These public data give the separate source extraction.

  3. doi:10.48550/arXiv.2310.17733

    This paper describes the source extraction method.

  4. useshttps://archive.stsci.edu/kepler/manuals/archive_manual.pdf

    This manual defines the data columns and quality flags.

  5. https://stdatu.stsci.edu/kepler/manuals/Data_Characteristics.pdf

    This manual describes detector changes that can mimic a transit.

  6. useshttps://archive.stsci.edu/hlsp/kbonus-bkg

    This page defines the source-extraction columns.

  7. A pointing model trained on Kepler quarters 2 and 6 predicts part of four later KIC 11084727 dips sci:sha256:cecc5729b222124a410bc3f78fca2c15b71dc4e239d71b6d5dc2cd39f9929f7a

    This published study on a different star motivates the image-motion checks. No numerical data are reused.

  8. useshttps://mast.stsci.edu/api/v0/invoke

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  9. useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0040/004078638/kplr004078638-2010078095331_llc.fits

    This is an exact raw input. The package records its path and hash.

  10. useshttps://stpubdata.s3.amazonaws.com/kepler/public/target_pixel_files/0040/004078638/kplr004078638-2010078095331_lpd-targ.fits.gz

    This is an exact raw input. The package records its path and hash.

  11. useshttps://archive.stsci.edu/hlsps/kbonus-bkg/lcs/2073/2073228271954235648/hlsp_kbonus-bkg_kepler_kepler_gaia-dr3-2073228271954235648_kepler_v1.0_lc.fits

    This source file gives one saved quarter 4 excerpt. Its full-file hash is recorded.

  12. useshttps://archive.stsci.edu/hlsps/kbonus-bkg/lcs/2073/2073228271954238080/hlsp_kbonus-bkg_kepler_kepler_gaia-dr3-2073228271954238080_kepler_v1.0_lc.fits

    This source file gives one saved quarter 4 excerpt. Its full-file hash is recorded.

  13. useshttps://archive.stsci.edu/hlsps/kbonus-bkg/lcs/2073/2073228271968527232/hlsp_kbonus-bkg_kepler_kepler_gaia-dr3-2073228271968527232_kepler_v1.0_lc.fits

    This source file gives one saved quarter 4 excerpt. Its full-file hash is recorded.

  14. useshttps://archive.stsci.edu/hlsps/kbonus-bkg/lcs/0040/004078614/hlsp_kbonus-bkg_kepler_kepler_kic-004078614_kepler_v1.0_lc.fits

    This source file gives one saved quarter 4 excerpt. Its full-file hash is recorded.

  15. useshttps://archive.stsci.edu/hlsps/kbonus-bkg/lcs/0040/004078638/hlsp_kbonus-bkg_kepler_kepler_kic-004078638_kepler_v1.0_lc.fits

    This source file gives one saved quarter 4 excerpt. Its full-file hash is recorded.

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