We present MCDA, a modification of the CoRoT detrend algorithm (CDA) suitable to detrend chromatic light curves. By means of robust statistics and better handling of short term variability, the implementation decreases the systematic light curve variations and improves the detection of exoplanets when compared with the original algorithm. All CoRoT chromatic light curves (a total of 65,655) were analysed with our algorithm. Dozens of new transit candidates and all previously known CoRoT exoplanets were rediscovered in those light curves using a box-fitting algorithm. For three of the new cases spectroscopic measurements of the candidates' host stars were retrieved from the ESO Science Archive Facility and used to calculate stellar parameters and, in the best cases, radial velocities. In addition to our improved detrend technique we announce the discovery of a planet that orbits a 0.79−0.09+0.08R⊙ star with a period of 6.71837±0.00001 days and has 0.57−0.05+0.06RJ and 0.15±0.10MJ. We also present the analysis of two cases in which parameters found suggest the existence of possible planetary companions.
@article{arxiv.1709.00351,
title = {A modified CoRoT detrend algorithm and the discovery of a new planetary companion},
author = {Rodrigo C. Boufleur and Marcelo Emilio and Eduardo Janot-Pacheco and Laerte Andrade and Sylvio Ferraz-Mello and José-Dias do Nascimento Júnior and J. Ramiro de La Reza},
journal= {arXiv preprint arXiv:1709.00351},
year = {2017}
}