Coherence search results of the lines seen in stochmon coherence results for week of Feb 19-26, 2017

The lines are posted here in stochastic alog:

https://stochastic-alog.ligo.org/aLOG/index.php?callRep=339476

There seems to be a 8-Hz comb from 24 Hz to 72 Hz. I run the coherence tool for all of them as single lines and one comb. Similar to L1 results, there are mostly PEM channels. Sometimes a few CAL, SUS or ASC channels show up. There results for H1 are here:

24Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_24/index.html

The 24 Hz line starts to be prevalent since week 3. It shows a lot in the EX, EY and CS magnetometers. 

32Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_32/index.html

We do not have this 32 Hz line in week 1 and 9. It also shows a lot in the EX, EY and CS magnetometers. A significant number of SUS channels are also involved.

40Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_40/index.html

We do not see the line in week 1,2,3 and 5. It shows mostly in EX, EY and CS magnetometers. There are channels from ASC and ISI in some weeks.

48Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_48/index.html

EX, EY and CS magnetometers have the line. A significant number of channels from SUS show up in recent weeks. A different structure at 48 Hz is seen from three channels in the HPI subsystem of week 9.

56Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_56/index.html

Still mostly channels of EX, EY and CS magnetometers are involved. A significant number of channels from SUS show up in recent weeks. A few channels from ASC are also involved.

64Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_64/index.html

We do not have the line in week 1 and 2. Among the PEM channels, EX, EY and CS magnetometers are involved. It also has many channels in the SUS subsystem. Only two channels see this 64 Hz line in the most recent week of the coherence data (week 14). 

72Hz: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_line_72/index.html

We do not have the line in week 1, 2 and 9. In all weeks, there are channels of EX, EY and CS magnetometers. 

8Hz Comb: https://ldas-jobs.ligo-wa.caltech.edu/~duo.tao/O2_comb_8/index.html

It seems right that there is a 8 Hz comb in recent weeks. In previous weeks, the comb only shows one or two lines. I do not know if they are parts of the comb or just some other lines happened to be there. Many CS, EX and EY magnetometers have the comb. Some ASC and SUS channels also have the comb.