Attached is a plot of the following 6 signals of that last 31h of IMC locking:

H1:PSL-FSS_FAST_MON_OUTPUT

H1:PSL-FSS_AUTOLOCK_STATE

H1:PSL-ISS_DIFFRACTION_AVG

H1:IMC-MC2_TRANS_SUM_OUTPUT

H1:PSL-FSS_TEMP_LOOP_OUTPUT

H1:PSL-PWR_NPRO_OUT_DQ

I didn't find a good PSL room temperature monitor, but I guess that all the fluctuations we see are temperature-induced in some form. See also elog 7593 for comparison.