![]() |
Figure 1: Left panels: gray-scale representation of the spectrograms for the relevant sections of the two observations analyzed here. Right panels: enlarged sections corresponding to the regions where the QPO signal is evident. The gray-scale bars on the right show the level of Leahy power. Notice that consecutive 4-s PDS in these images are shifted by only 1 s. |
Open with DEXTER |
![]() |
Figure 2: PDS corresponding to the peak power in the spectrograms of Fig. 1 (empty bars) and average PDS of the preceding and following four PDS (filled bars). |
Open with DEXTER |
![]() |
Figure 3: Folded light curves for the two intervals with the high-coherence oscillation. Two cycles are shown for clarity. |
Open with DEXTER |