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arXiv 1001.0258astro-ph.EP
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开普勒科学处理管道概述

Overview of the Kepler Science Processing Pipeline

Jon M. Jenkins, Douglas A. Caldwell, Hema Chandrasekaran, Joseph D. Twicken, Stephen T. Bryson, Elisa V. Quintana, Bruce D. Clarke, Jie Li, Christopher Allen, P… 展开作者

Jon M. Jenkins, Douglas A. Caldwell, Hema Chandrasekaran, Joseph D. Twicken, Stephen T. Bryson, Elisa V. Quintana, Bruce D. Clarke, Jie Li, Christopher Allen, Peter Tenenbaum, Hayley Wu, Todd C. Klaus, Christopher K. Middour, Miles T. Cote, Sean McCauliff, Forrest R. Girouard, Jay P. Gunter, Bill Wohler, Jeneen Sommers, Jennifer R. Hall, Kamal Uddin, Michael S. Wu, Paresh A. Bhavsar, Jeffrey Van Cleve, David L. Pletcher, Jessie A. Dotson, Michael R. Haas, Ronald L. Gilliland, David G. Koch, William J. Borucki

摘要:

开普勒任务科学操作中心(SOC)执行几项关键功能,包括管理约156,000颗目标恒星,相关目标表,科学数据压缩表和参数,以及处理每月从航天器下行的原始光度数据。原始数据首先在像素级进行校准,以校正偏差、无快门读出引起的拖尾以及其他检测器和电子效应。一个背景天空通量估计从约4500像素的84个CCD读出通道,和简单的光圈测光进行最佳光圈为每个明星。辅助工程数据和诊断信息提取的科学数据被用来删除系统误差的通量时间序列,这些数据与搜索的过境行星的签名与小波为基础的,自适应匹配滤波器之前。签名超过7.1 sigma的恒星会接受一套统计测试,包括检查每颗恒星的质心运动,以排除背景食双星造成的误报。每个行星候选者的物理参数都被拟合到凌日信号中,并在剩余光变曲线中寻找其他凌日行星的信号。该管道正在运行,寻找行星特征并提供强大的误报消除。

英文摘要:

The Kepler Mission Science Operations Center (SOC) performs several critical functions including managing the ~156,000 target stars, associated target tables, science data compression tables and parameters, as well as processing the raw photometric data downlinked from the spacecraft each month. The raw data are first calibrated at the pixel level to correct for bias, smear induced by a shutterless readout, and other detector and electronic effects. A background sky flux is estimated from ~4500 pixels on each of the 84 CCD readout channels, and simple aperture photometry is performed on an optimal aperture for each star. Ancillary engineering data and diagnostic information extracted from the science data are used to remove systematic errors in the flux time series that are correlated with these data prior to searching for signatures of transiting planets with a wavelet-based, adaptive matched filter. Stars with signatures exceeding 7.1 sigma are subjected to a suite of statistical tests including an examination of each star's centroid motion to reject false positives caused by background eclipsing binaries. Physical parameters for each planetary candidate are fitted to the transit signature, and signatures of additional transiting planets are sought in the residual light curve. The pipeline is operational, finding planetary signatures and providing robust eliminations of false positives.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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