Demystifying Kepler Data: A Primer for Systematic Artifact Mitigation

doi:10.1086/667603

2012-09-01

DOI：10.1086/667603

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摘要

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The Kepler spacecraft has collected data of high photometric precision and cadence almost continuously since operations began on 2009 May 2. Primarily designed to detect planetary transits and asteroseismological signals from solar-like stars, Kepler has provided high-quality data for many areas of investigation. Unconditioned simple aperture time-series photometry is, however, affected by systematic structure. Examples of these systematics include differential velocity aberration, thermal gradients across the spacecraft, and pointing variations. While exhibiting some impact on Kepler's primary science, these systematics can critically handicap potentially ground-breaking scientific gains in other astrophysical areas, especially over long timescales greater than 10 days. As the data archive grows to provide light curves for 10(5) stars of many years in length, Kepler will only fulfill its broad potential for stellar astrophysics if these systematics are understood and mitigated. Post-launch developments in the Kepler archive, data reduction pipeline and open source data analysis software have helped to remove or reduce systematic artifacts. This paper provides a conceptual primer to help users of the Kepler data archive understand and recognize systematic artifacts within light curves and some methods for their removal. Specific examples of artifact mitigation are provided using data available within the archive. Through the methods defined here, the Kepler community will find a road map to maximizing the quality and employment of the Kepler legacy archive.

Keyword:

RED GIANT

INITIAL CHARACTERISTICS

HIERARCHICAL TRIPLE

CADENCE DATA

STARS. II.

VARIABILITY

SCIENCE

MISSION

PERFORMANCE

ROTATION

期刊

Publications of the Astronomical Society of the Pacific

IF:

7.7

论文数:

4.0K

被引数:

1.8W

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national aeronautics & space administration (nasa)

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3.1W

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被引数: 46

vanderbilt university

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5.1W

论文数: 4.1W

被引数: 59

nasa ames research center

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3.5K

论文数: 2.7K

被引数: 8

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