tokens: We warmly thank A. K. Vivas for useful discussions and information regarding her team’s variability search around Cen. We also thank the anonymous referee for useful comments that helped improve the presentation of our results. Support for this project is provided by the Ministry for the Economy, Development, and Tourism’s Programa Iniciativa Científica Milenio through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS); by Proyecto Basal PFB-06/2007; and by FONDECYT grants #1141141 (C.N., F.G., M.C.), #1130196 (F.G., D.M.), #3130320 (R.C.R.), and #3130552 (J.A.-G.). C.N. and F.G. acknowledge additional support from CONICYT-PCHA/Magíster Nacional (grants 2012-22121934 and 2014-22141509, respectively).
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