The SARS algorithm: detrending CoRoT light curves with Sysrem using simultaneous external parameters
Abstract
Surveys for exoplanetary transits are usually limited not by photon noise but rather by the amount of red noise in their data. In particular, although the CoRoT spacebased survey data are being carefully scrutinized, significant new sources of systematic noises are still being discovered. Recently, a magnitude-dependant systematic effect was discovered in the CoRoT data by Mazeh & Guterman et al. and a phenomenological correction was proposed. Here we tie the observed effect a particular type of effect, and in the process generalize the popular Sysrem algorithm to include external parameters in a simultaneous solution with the unknown effects. We show that a post-processing scheme based on this algorithm performs well and indeed allows for the detection of new transit-like signals that were not previously detected.
Keywords
Cite
@article{arxiv.1003.0427,
title = {The SARS algorithm: detrending CoRoT light curves with Sysrem using simultaneous external parameters},
author = {Aviv Ofir and Roi Alonso and Aldo Stefano Bonomo and Ludmila Carone and Stefania Carpano and Benjamin Samuel and Jorg Weingrill and Suzanne Aigrain and Michel Auvergne and Annie Baglin and Pierre Barge and Pascal Borde and Francois Bouchy and Hans J. Deeg and Magali Deleuil and Rudolf Dvorak and Anders Erikson and Sylvio Ferraz Mello and Malcolm Fridlund and Michel Gillon and Tristan Guillot and Artie Hatzes and Laurent Jorda and Helmut Lammer and Alain Leger and Antoine Llebaria and Claire Moutou and Marc Ollivier and Martin Paetzold and Didier Queloz and Heike Rauer and Daniel Rouan and Jean Schneider and Guenther Wuchterl},
journal= {arXiv preprint arXiv:1003.0427},
year = {2015}
}
Comments
MNRAS accepted. 5 pages, 3 figures