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arXiv · 1509.03403

Exposure-based Algorithm for Removing Systematics out of the CoRoT Light Curves

P. Guterman·T. Mazeh·S. Faigler
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Abstract

The CoRoT space mission was operating for almost 6 years, producing thousands of continuous photometric light curves. The temporal series of exposures are processed by the production pipeline, correcting the data for known instrumental effects. But even after these model-based corrections, some collective trends are still visible in the light curves. We propose here a simple exposure-based algorithm to remove instrumental effects. The effect of each exposure is a function of only two instrumental stellar parameters, position on the CCD and photometric aperture. The effect is not a function of the stellar flux, and therefore much more robust. As an example, we show that the $\sim2\%$ long-term variation of the early run LRc01 is nicely detrended on average. This systematics removal process is part of the CoRoT legacy data pipeline.

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P. Guterman, T. Mazeh, S. Faigler. 2015-09-11. Exposure-based Algorithm for Removing Systematics out of the CoRoT Light Curves. https://arxiv.org/abs/1509.03403

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