GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run - Data Quality Products for GW Searches

This material is part of several data products associated with GWTC-2.1, the deep extended catalog of compact binary coalescences observed by the LIGO Scientific Collaboration and the Virgo Collaboration during the first half of the third observing run. For further information, see the paper (dcc.ligo.org/LIGO-P2100063/public), the related material linked from this page, and the GWTC-2.1 data release documentation (www.gw-openscience.org/GWTC-2.1/).

This release contains data quality products that are used by search analyses to help mitigate non-Gaussian noise in the detector data.

Renormalized iDQ timeseries

This release contains the renormalized iDQ timeseries data quality product used within the GstLAL search to generate results for GWTC-2.1 as described in Goodwin et al. 2020. This data product was found to be statistically helpful in improving data quality within the GstLAL search. For further information about iDQ see Essick et al. 2020.

The file 

• H1L1-IDQ_TIMESERIES-1238166018-15843600.h5

contains a time series for each LIGO detector related to the probability of a glitch in the strain data given the behavior in the analyzed auxiliary channels which monitor the behavior of the detectors and their environment.

The HDF5-formatted file contains two groups, H1 and L1, corresponding to LIGO Hanford and LIGO Livingston, respectively. Each group contains several datasets; the data dataset corresponds to the renormalized iDQ log-likelihoods, as described in Godwin et al. 2020, and the time dataset corresponds to the times associated with the renormalized iDQ log-likelihoods in the data dataset.

For more general background on gravitational-wave data quality, try the materials from a GW Open Data Workshop or the guide to LIGO-Virgo data analysis.