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Detector Characterisation (Glitches)
narnaud - 11:01 Friday 25 April 2025 (66628) Print this report
25-minute glitches are still there

Not that there was much hope they would go away with the NE replacement, but that plot for instance clearly shows that the 25-minute glitches are still there.

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salvador - 16:02 Friday 25 April 2025 (66629) Print this report

Strangely enough, there seems to be a second glitch before (or after) the 25-min glitch which appears more often compared to before the WE mirror replacement.
Fig. 1 shows the spectrogram of Hrec_hoft_20000Hz for 15000 s with 10s time steps from 05-03-2025 at 21:00 UTC, fig. 2 shows a close-up on the first 1.2 hours with 3 glitches.

Fig. 3 shows the same spectrogram but from yesterday 24-04-2025 at 21:00 UTC, fig. 4 shows the close-up at the last 1.2 hours with 3 glitches.

The time difference between the 2 glitches is not constant and is the order of 1 minute.

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