Photometric analysis in the Kepler Science Operations Center pipeline

Joseph D. Twicken; Bruce D. Clarke; Stephen T. Bryson; Peter Tenenbaum; Hayley Wu; Jon M. Jenkins; Forrest Girouard; Todd C. Klaus

doi:10.1117/12.856790

19 July 2010 Photometric analysis in the Kepler Science Operations Center pipeline

Joseph D. Twicken, Bruce D. Clarke, Stephen T. Bryson, Peter Tenenbaum, Hayley Wu, Jon M. Jenkins, Forrest Girouard, Todd C. Klaus

Author Affiliations +

Proceedings Volume 7740, Software and Cyberinfrastructure for Astronomy; 774023 (2010) https://doi.org/10.1117/12.856790
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Joseph D. Twicken, Bruce D. Clarke, Stephen T. Bryson, Peter Tenenbaum, Hayley Wu, Jon M. Jenkins, Forrest Girouard, and Todd C. Klaus "Photometric analysis in the Kepler Science Operations Center pipeline", Proc. SPIE 7740, Software and Cyberinfrastructure for Astronomy, 774023 (19 July 2010); https://doi.org/10.1117/12.856790

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