significances that exceeded the 99$\%$ confidence levels for both white noise and red noise processes (see Figs. \[gwpsall1\], \[gwpsall2\]) and appeared at either too short (i.e. at timescales shorter than 3.6$\%$ the length of the observation) or too long (i.e. at timescales greater than half the length of the observation) a timescale. Some of the AGN in our sample have been studied before and previous reports of QPOs exist in the literature. We will discuss those results in more detail in Section \[discussionprevious\].

### Structure Function Results {#sfanalysis}

After correcting for pile-up, we subtract a constant level corresponding to Poisson photon noise from the structure functions (Figures \[sfminus1\], \[sfminus2\]). The slopes are measured by fitting a power-law to the SF curve using the least-squares method in $log(SF)-log(\delta t)$ space. Slopes are listed in Table \[sftbl\] along with the characteristic time-scales of variability, which were measured by identifying the times of turnover from plateau to power-law and vice versa in the SF curve. All of our structure functions have a flat plateau at short timescales corresponding to Poisson photon noise, most have a power-law portion, and some have a plateau at long timescales. We include light curves in Figures  \[lightcurves1\],  \[lightcurves2\] 