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H1 ISC
kiwamu.izumi@LIGO.ORG - posted 16:47, Wednesday 30 March 2016 - last comment - 12:10, Friday 08 April 2016(26345)
DCPD cross correlated spectra with long integration

This is an update of the DCPD cross correlated spectra. This time I have added the one from Livingston which was integrated over 1266 hours using the O1 data. High noise durations (e.g. LLO 23453) are excluded from the integration.

The fig and mat files are attached.

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matthew.evans@LIGO.ORG - 12:10, Friday 08 April 2016 (26499)

Similar to previous entries, I put in the coating thermal noise and some oscillator AM to see how things look (plot 1).  I also made a similar plot with higher thermal noise (by 1.4) and a 1/f^2 mystery noise to show what the limits are on these types of added noises (plot 2).  Plot 3 shows the "uncorrelated noise budget", which required a 350Hz DARM cavity pole, and leaves something unexplained below 100Hz.  There is something strange happening around 700Hz, but maybe I have overestimated the oscilator AM.

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