Presearch Data Conditioning in the Kepler Science Operations Center Pipeline
2010
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.
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