The Simultaneous Additive and Relative SysRem Algorithm

Details The Simultaneous Additive and Relative SysRem Algorithm The Simultaneous Additive and Relative SysRem Algorithm

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epjwc..1101006o&link_type=abstract

Detection and Dynamics of Transiting Exoplanets, St. Michel l'Observatoire, France, Edited by F. Bouchy; R. Díaz; C. Moutou; EPJ

Physics

Scientific paper

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.

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