Coherences for last nigh lock are available here:
https://ldas-jobs.ligo.caltech.edu/~gabriele.vajente/bruco_1109322016/
Here is my summary of the summary:
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No more coherence with BS ISI at low frequency
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Low frequency shows coherence mostly with MICH, SRCL and PRCL
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We still have the significant coherence with SRCL/PRCL at all frequencies, likely due to frequency/intensity noise. We'll have to try and tune the IMC longitudinal locking point soon
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There is large coherence at 967 - 974 Hz with ISI_HAM2_BLND_GS13RZ and ISI_HAM5_BLND_GS13RZ
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The 3 kHz bump, which is larger at the beginning of the lock and smaller close to the end, shows large coherence (basically 1) with IMC length control LSC-MCL_OUT. Maybe it's a gain peaking of the REFL servo?