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Proceedings Paper

Presearch data conditioning in the Kepler Science Operations Center pipeline
Author(s): Joseph D. Twicken; Hema Chandrasekaran; Jon M. Jenkins; Jay P. Gunter; Forrest Girouard; Todd C. Klaus
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Paper Abstract

We describe the Presearch Data Conditioning (PDC) software component and its context in the Kepler Science Operations Center (SOC) Science Processing Pipeline. The primary tasks of this component are to correct systematic and other errors, remove excess flux due to aperture crowding, and condition the raw flux light curves for over 160,000 long cadence (~thirty minute) and 512 short cadence (~one minute) stellar targets. Long cadence corrected flux light curves are subjected to a transiting planet search in a subsequent pipeline module. We discuss science algorithms for long and short cadence PDC: identification and correction of unexplained (i.e., unrelated to known anomalies) discontinuities; systematic error correction; and removal of excess flux due to aperture crowding. We discuss the propagation of uncertainties from raw to corrected flux. Finally, we present examples from Kepler flight data to illustrate PDC performance. Corrected flux light curves produced by PDC are exported to the Multi-mission Archive at Space Telescope [Science Institute] (MAST) and are made available to the general public in accordance with the NASA/Kepler data release policy.

Paper Details

Date Published: 19 July 2010
PDF: 12 pages
Proc. SPIE 7740, Software and Cyberinfrastructure for Astronomy, 77401U (19 July 2010); doi: 10.1117/12.856798
Show Author Affiliations
Joseph D. Twicken, NASA Ames Research Ctr. (United States)
Hema Chandrasekaran, NASA Ames Research Ctr. (United States)
Jon M. Jenkins, NASA Ames Research Ctr. (United States)
Jay P. Gunter, NASA Ames Research Ctr. (United States)
Forrest Girouard, NASA Ames Research Ctr. (United States)
Todd C. Klaus, NASA Ames Research Ctr. (United States)

Published in SPIE Proceedings Vol. 7740:
Software and Cyberinfrastructure for Astronomy
Nicole M. Radziwill; Alan Bridger, Editor(s)

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