Fig. 3.

Time series of BRITE (blue), SMEI (black), and APT (green) photometry. The mean magnitude of SMEI and BRITE is 0 by construct. The mean magnitude of the APT data has been shifted to zero compared to the data provided on the web. The APT data were analysed in detail by Henry & Smith (2012). The figure shows that the noise in the SMEI satellite data is significantly higher than in the APT and BRITE measurements.
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