Rotation of α Cir observed by the red-sensitive (top) and blue-sensitive (bottom) BRITEs, respectively, with P_rot = 4.4790^d. Phase-bin averages with 1σ errors are given together with the theoretical light curve obtained for the respective spot model (see Sect. 4). Phases 0 to 1 also show the binned original BRITE data with an overall rms noise of 9 mmag for the red and of 15 mmag for the blue light curve.