The Simultaneous Additive and Relative SysRem Algorithm
School of Physics and Astronomy, Tel Aviv University,
We present the SARS algorithm, which is a generalization of the popular SysRem detrending technique. This generalization allows including multiple external parameters in a simultaneous solution with the unknown eﬀects. Using SARS allowed us to show that the magnitude-dependant systematic eﬀect discovered by Mazeh et al. (2009) in the CoRoT data is probably caused by an additive –rather than relative– noise source. A post-processing scheme based on SARS performs well and indeed allows for the detection of new transit-like signals that were not previously detected.
© Owned by the authors, published by EDP Sciences, 2011