XTE 1118+480 Figure 4.

Figure 4. The 10-s quasiperiodic oscillation in the UMa transient. Upper frame, average power spectrum from 36 12.5 minute runs with a 3.1 s cycle time (1 s integration, 2.1 s readout) during April 30-May 3. Lower frame, log-log power spectrum after smoothing. All data from CBA-East (Dave Skillman, 66 cm f/2.9 telescope). This signal appears to be of ~0.15 mag amplitude - the cause of the great scatter in the high-speed light curves!

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