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April 10-13 MBTA results

by Frederique Marion last modified 2009-04-15 19:20

This page summarizes the main results obtained by online MBTA during the quiet period of the Easter lock.

MBTA ran online during WSR11, over a mass range from 1 to 3 solar masses. The initial frequency of the search was 80 Hz. The main results are summarized in the following figures. 

The time evolution of the triggers SNR and of the trigger rate is shown here:

April 10-13 MBTA SNR and trigger rate vs time

The SNR and chi2 vs SNR distributions are shown here:

April 10-13 MBTA SNR distribution

The spectrum of the MBTA triggers SNR fluctuations over the full run, which shows the characteristic frequencies of the non-stationarities impacting the inspiral search, is shown here:

April 10-13 MBTA SNR spectrum

The strong lines at 210 and 420 mHz that were present during WSR11 and especially WSR12 are not seen anymore, presumably thanks to the work done on the BS longitudinal control.

The list of triggers with SNR greater than 10 is given in this table:

GPS SNR QScan Comment
923457022.070

81.6
 here ???
923692558.912
 48.4
 here Seismic noise in central building, right before the unlock
923470502.676
 32.7
 here Looks like a "WI glitch" from the step in h(t)
923692537.483
 16.4
 here Seismic noise in central building
923649745.749
 16.0
 here Disturbance in BS_txCorr (due to seismic noise in central building?)
923509743.684
 12.6
 here Seismic noise in mode-cleaner building?
923600630.876 11.5 here  ???
923524101.918 10.8 here Seismic noise in central and NE buildings?