Top: BRITE-Toronto (BTr) and UniBRITE (UBr) photometry for ε Cyg, taken contemporaneously with the first RVs of the SONG data set. The displayed photometry data are median values for all cases of multiple measurements within one day, and both data sets have been normalized by their respective median values; the RVs are the residuals of the SONG measurements after subtracting the long-period signal induced by the binary companion (see Sect. 4.1), and the dashed line denotes the best-fit model. Bottom: GLS periodogram of the Brite photometry data sets. The best-fit Keplerian orbital period of the signal of 291 d is marked with a red line.