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PyCBC Live O3 Review
The major difference from the O2 analysis is that triggers are now generated from all detectors. This works by first generating double coincidences from all possible detector pairs, then picking the most significant double, and finally using the SNR time series in the remaining detectors to derive a p-value, which is then used to modify the FAR of the original double coincidence.
(See PyCBC-Live-O3-development for more discussion in context of the overall development plan.)
A list of candidate events in O2 replay after changes in https://git.ligo.org/sccb/requests/issues/205
- Added to the review call minutes: https://www.lsc-group.phys.uwm.edu/ligovirgo/cbcnote/PycbcReviewCall20190607
Procedure: let the pipeline run on O2 replay data and monitor the duty factor, lag and memory usage, making sure all combinations of detectors are explored.
Contact: Tito
Outcome:
- Daily lag monitor for replay analysis and production analysis.
- Memory usage appears stable.
Signoff:
Procedure: plot the rate of triggers vs their FAR after running on replay data.
Contact: Tito
Outcome: plot showing agreement over 6 days
Signoff:
Procedure: using the O2 replay analysis, wait for triggers to be uploaded (with all possible ifo combinations) and check that BAYESTAR completes successfully.
Contact:
Outcome:
Signoff:
Reference could be the O2 PyCBC Live configuration, or O3 offline search.
Procedure: TBD. Reuse the data/scripts for the O2 review?
Contact: Bhooshan/Tito
reanalysis of old O2 injections wiki page with O3-style injections
Optional?
Procedure: repeat the analysis done on step 4 with a different combination of detectors.
Contact:
- Uses pre-gated strain
- State/DQ channels and flags as in O2
- New ETMX saturation flag for H and L not yet used
- Virgo's GOOD_DQ bit currently used as CAT2 rather than CAT1
- Florent's veto stream for PyCBC not yet used
- A patch is being tested to enable the above points
- SNR and NewSNR thresholds lowered to 4.5
- GraceDB upload threshold
- Ranking statistic uses sine-Gaussian veto and phase-time-amplitude check for all detector pairs
Signoff:
- Template Bank is in used for ER14/EarlyO3 is here
Procedure: banksim
Contact: Soumen?
Signoff: