jenne.driggers@LIGO.ORG - posted 15:40, Thursday 20 February 2020 - last comment - 16:33, Thursday 20 February 2020(55204)
2 short observing stretches with higher DARM offset
An explicit alog to notify / remind folks that we had two short observing stretches this afternoon with a higher DARM offset (more details on the test in a later alog). This was intended to be our new nominal configuration, however it appears that this has us locked too close to the edge of the range of our OMC DCPDs and we are not able to hold lock through a glitch, so the change has been backed out.
The two observation periods with the larger DARM offset stretches were 2020-02-20 between 21:08 - 21:29 UTC 2020-02-20 between 22:07 - 23:00 UTC This will be of interest much later when the calibration group is reviewing the data and sees this funky 2-3% outlier in \kappa_C, and/or the brief period when the inspiral range on the summary pages as computed by CAL-DELTAL_EXTERNAL and GDS-CALIB_STRAIN actually agree for a brief moment. (see attached copy of the range plot for today...)