Since yesterday evening there are rare but strong (SNR > 100, up to 1000 or higher) glitches. And this time UPV finds some vetoes. I've run it on the past 24 hours and the results are at https://scientists.virgo-gw.eu/DataAnalysis/UPV/2024/20241128/last_day_1416736178-1416822578/V1:Hrec_hoft_16384Hz/perf/vp.html. The best witness channels are
Vetoes
Number of vetoes: | 382 |
Dead time: | Integrated time when the veto is active. We note d the fraction of the total livetime (69028 s) when the veto is active. |
Efficiency (ε): | This is the fraction of V1:Hrec_hoft_16384Hz triggers which are vetoed. |
ε/d: | This factor is larger than 1 when the veto rejects more triggers than a random veto. |
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The effect of these vetoes can be seen by following a link "click here to expand/hide" and comparing the time-frequency trigger distribution before and after the veto. For instance before / after for the V1:SPRB_B4_DC-based veto.