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Abstract: The Kepler Mission Science Operations Center SOC performs several criticalfunctions including managing the ~156,000 target stars, associated targettables, science data compression tables and parameters, as well as processingthe raw photometric data downlinked from the spacecraft each month. The rawdata are first calibrated at the pixel level to correct for bias, smear inducedby a shutterless readout, and other detector and electronic effects. Abackground sky flux is estimated from ~4500 pixels on each of the 84 CCDreadout channels, and simple aperture photometry is performed on an optimalaperture for each star. Ancillary engineering data and diagnostic informationextracted from the science data are used to remove systematic errors in theflux time series that are correlated with these data prior to searching forsignatures of transiting planets with a wavelet-based, adaptive matched filter.Stars with signatures exceeding 7.1 sigma are subjected to a suite ofstatistical tests including an examination of each star-s centroid motion toreject false positives caused by background eclipsing binaries. Physicalparameters for each planetary candidate are fitted to the transit signature,and signatures of additional transiting planets are sought in the residuallight curve. The pipeline is operational, finding planetary signatures andproviding robust eliminations of false positives.



Autor: Jon M. Jenkins, Douglas A. Caldwell, Hema Chandrasekaran, Joseph D. Twicken, Stephen T. Bryson, Elisa V. Quintana, Bruce D. Clark

Fuente: https://arxiv.org/







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