Black points are observed data with MAXI/GSC in 2-20 keV band.
Red points are in the observational gaps and linearly-interpolated.
The left is with 1 day averaged data, and the right is with 1 orbit data.
These pannels are NPSDs calculated from the upper light curves.
Upper pannel is the NPSD with vertical axisplotted in linear scale, and lower is that with log scale.
Red line is a roughly indication of the poisson-level caluculated by the mean value of the NPSD in higher frequencies than 1e-6 Hz.