High frequency sensitivity got better by factor of 5!!

Because of the contrast defect, the frequency noise, the intensity noise, or other common noise coupling was large. After tweaking of the alignment, the high frequency noise got much better.
Also, since the DARM error signal RMS got small, I could engaged the whitening stage of AS PD. It improved the sensivity factor of 2 more.

The BNS inspiral range is above 10 kpc now.