Kepler Mission Stellar and Instrument Noise Properties Revisited

Abstract

An earlier study of the Kepler Mission noise properties on time scales of primary relevance to detection of exoplanet transits found that higher than expected noise followed to a large extent from the stars, rather than instrument or data analysis performance. The earlier study over the first six quarters of Kepler data is extended to the full four years ultimately comprising the mission. Efforts to improve the pipeline data analysis have been successful in reducing noise levels modestly as evidenced by smaller values derived from the current data products. The new analyses of noise properties on transit time scales show significant changes in the component attributed to instrument and data analysis, with essentially no change in the inferred stellar noise. We also extend the analyses to time scales of several days, instead of several hours to better sample stellar noise that follows from magnetic activity. On the longer time scale there is a shift in stellar noise for solar-type stars to smaller values in comparison to solar values.

10 pages, 8 figures, accepted by AJ

References in corpus (8)

• The connection between stellar granulation and oscillation as seen by the Kepler mission
• Kepler-62: A five-planet system with planets of 1.4 and 1.6 Earth radii in the Habitable Zone
• Patterns of photometric and chromospheric variation among Sun-like stars: A 20-year perspective
• Rotation Periods, Variability Properties and Ages for Kepler Exoplanet Candidate Host Stars
• An observational correlation between stellar brightness variations and surface gravity
• Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone
• The effects of stellar winds on the magnetospheres and potential habitability of exoplanets
• Astrophysically robust systematics removal using variational inference: application to the first month of Kepler data

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