• DOI:10.1117/12.856638
• Corpus ID: 121398671

Kepler instrument performance: an in-flight update

@inproceedings{Caldwell2010KeplerIP,
  title={Kepler instrument performance: an in-flight update},
  author={Douglas A. Caldwell and Jeffrey E. Van Cleve and Jon M. Jenkins and Vic S. Argabright and Jeffery J. Kolodziejczak and Edward Wood Dunham and John Charles Geary and Peter Tenenbaum and Hema Chandrasekaran and Jie Li and Hayley Wu and Jason Von Wilpert},
  booktitle={Astronomical Telescopes + Instrumentation},
  year={2010}
}

• D. Caldwell, J. V. Van Cleve, +9 authors Jason Von Wilpert
• Published in
  Astronomical Telescopes…
  16 July 2010
• Physics

The Kepler Mission is designed to detect the 80 parts per million (ppm) signal from an Earth-Sun equivalent transit. Such precision requires superb instrument stability on time scales up to 2 days and systematic error removal to better than 20 ppm. The sole scientific instrument is the Photometer, a 0.95 m aperture Schmidt telescope that feeds the 94.6 million pixel CCD detector array, which contains both Science and Fine Guidance Sensor (FGS) CCDs. Since Kepler's launch in March 2009, we have been using the commissioning and science operations data to characterize the instrument and monitor its performance. We find that the in-flight detector properties of the focal plane, including bias levels, read noise, gain, linearity, saturation, FGS to Science crosstalk, and video crosstalk between Science CCDs, are essentially unchanged from their pre-launch values. Kepler's unprecedented sensitivity and stability in space have allowed us to measure both short- and long- term effects from cosmic rays, see interactions of previously known image artifacts with starlight, and uncover several unexpected systematics that affect photometric precision. Based on these results, we expect to attain Kepler's planned photometric precision over 90% of the field of view.