[Murakoshi (Aoyama Gakuin univ.), Yokozawa, Ushiba, Yuzurihara]
Murakoshi-san created a scatter plot of YAW and PIT values of PRM channels at the time of glitch on IMMT1 oplev signa. 32 seconds of data were collected approximately every hour and superimposed on the scatter plot to investigate correlation.
The scatter plot is attached. The magenta points indicate the PRM values at the glitch. The black points shows the PRM values of normal data, which is intended to show the background data.
From comparing two kinds of data, we don't find the characteristic behavior. The results indicate that PRM channels are unlikely to be the cause of glitch on IMMT1 oplev, at this time.
As a next step, we will create the scatter plot of every 1 hour with overlapping the background distribution. The reason to make 1 hour scatter plot is that there is a time-trend in the PRM channels over 12 hour.
The collected csv data are also attached.