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Proceedings Paper

Photometric analysis in the Kepler Science Operations Center pipeline
Author(s): Joseph D. Twicken; Bruce D. Clarke; Stephen T. Bryson; Peter Tenenbaum; Hayley Wu; Jon M. Jenkins; Forrest Girouard; Todd C. Klaus
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Paper Abstract

We describe the Photometric Analysis (PA) software component and its context in the Kepler Science Operations Center (SOC) Science Processing Pipeline. The primary tasks of this module are to compute the photometric flux and photocenters (centroids) for over 160,000 long cadence (~thirty minute) and 512 short cadence (~one minute) stellar targets from the calibrated pixels in their respective apertures. We discuss science algorithms for long and short cadence PA: cosmic ray cleaning; background estimation and removal; aperture photometry; and flux-weighted centroiding. We discuss the end-to-end propagation of uncertainties for the science algorithms. Finally, we present examples of photometric apertures, raw flux light curves, and centroid time series from Kepler flight data. PA light curves, centroid time series, and barycentric timestamp corrections 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, 774023 (19 July 2010); doi: 10.1117/12.856790
Show Author Affiliations
Joseph D. Twicken, NASA Ames Research Ctr. (United States)
Bruce D. Clarke, NASA Ames Research Ctr. (United States)
Stephen T. Bryson, NASA Ames Research Ctr. (United States)
Peter Tenenbaum, NASA Ames Research Ctr. (United States)
Hayley Wu, NASA Ames Research Ctr. (United States)
Jon M. Jenkins, 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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