While we were out we tested turning on and off the SQZ noise eater. It clearly made the ~103Hz line come up and disappeared. So, we left it off and the associated SDF is attached.
Images attached to this comment
thomas.massinger@LIGO.ORG - 15:20, Thursday 02 May 2019 (48942)DetChar
For visualization purposes, we lined up the noise eater toggle with a spectrogram of the SQZ laser and h(t). The state switches line up perfectly and the wandering line in h(t) disappears when the noise eater is switched off.
Back to Observing 1925 UTC.
While we were out we tested turning on and off the SQZ noise eater. It clearly made the ~103Hz line come up and disappeared. So, we left it off and the associated SDF is attached.
TJ, Andy, Josh
For visualization purposes, we lined up the noise eater toggle with a spectrogram of the SQZ laser and h(t). The state switches line up perfectly and the wandering line in h(t) disappears when the noise eater is switched off.
See attached time series and spectrograms.