The Random Transiter – EPIC 249706694/HD 139139
S. Rappaport, A. Vanderburg, M. H. Kristiansen et al., 2019. Monthly Notices of the Royal Astronomical Society 488(2), 2455–2465.
The discovery paper. In K2 Campaign 15, the star shows 28 transit-like dips in 87 days, almost all 200 ± 80 ppm deep and 1 to 7 hours long, at times that look random; no more than four can belong to one periodic sequence. Data-quality tests (rolling bands, centroids, cross-talk, bad pixels) find no instrumental cause. A fainter K-type star 3.3 arcseconds away, probably bound, shares the aperture. Spectra from TRES and McDonald show no large radial-velocity changes. Planetary, binary, asteroid, dipper and starspot scenarios are examined and none is satisfactory.
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The primary description of the dips, the two stars and every tested explanation.
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Rappaport, S., Vanderburg, A., Kristiansen, M. H., Omohundro, M. R., Schwengeler, H. M., Terentev, I. A., & et al. (2019). The Random Transiter – EPIC 249706694/HD 139139. Monthly Notices of the Royal Astronomical Society 488(2), 2455–2465. https://doi.org/10.1093/mnras/stz1772
@article{rappaport2019random,
author = {Rappaport, S. and Vanderburg, A. and Kristiansen, M. H. and Omohundro, M. R. and Schwengeler, H. M. and Terentev, I. A. and {et al.}},
title = {The Random Transiter – EPIC 249706694/HD 139139},
journal = {Monthly Notices of the Royal Astronomical Society 488(2), 2455–2465},
year = {2019},
doi = {10.1093/mnras/stz1772},
url = {https://doi.org/10.1093/mnras/stz1772}
}TY - JOUR TI - The Random Transiter – EPIC 249706694/HD 139139 AU - Rappaport, S. AU - Vanderburg, A. AU - Kristiansen, M. H. AU - Omohundro, M. R. AU - Schwengeler, H. M. AU - Terentev, I. A. AU - et al. PY - 2019 JO - Monthly Notices of the Royal Astronomical Society 488(2), 2455–2465 DO - 10.1093/mnras/stz1772 UR - https://doi.org/10.1093/mnras/stz1772 ER -
Rappaport, S. et al.. “The Random Transiter – EPIC 249706694/HD 139139.” Monthly Notices of the Royal Astronomical Society 488(2), 2455–2465 (2019). https://doi.org/10.1093/mnras/stz1772.