Fig. 9
Influence of multiple spectra taken on one night on the GLS periodogram. Black/solid and red/dash-dotted denote the power for IHα and ICa,1, respectively, including multiple spectra. Cyan/dashed and green/dotted denote the power for IHα and ICa,1, respectively, excluding multiple spectra. The horizontal blue lines show the FAP levels of 0.1 (dash-dotted), 0.05 (dashed), and 0.01 (solid). Top panel: the extreme case of GX And. Bottom panel: the typical case of BD 21652.
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