Table 2.
Candidate events from this search for IMBH mergers in O3a data, including binary black hole mergers outside the IMBH parameter space, and a comparison with previously obtained GWTC-2 results from the template based search algorithms (Abbott et al. 2021a).
| cWB | PyCBC |
GstLAL |
Combined | ||||
|---|---|---|---|---|---|---|---|
| GWTC-2 Broad | GWTC-2 BBH | IMBH | GWTC-2 Broad | IMBH | IMBH | ||
| Event | FAR (yr−1) | FAR (yr−1) | FAR (yr−1) | p̄ | |||
| GW190408_181802 | 9.5 × 10−4 | < 2.5 × 10−5 | < 7.9 × 10−5 | 1.6 × 10−2 | < 1.0 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−4 |
| GW190413_052954 | − | − | 7.2 × 10−2 | 5.6 × 10−1 | − | 5.4 × 10+3 | 7.1 × 10−1 |
| GW190413_134308 | − | − | 4.4 × 10−2 | 1.4 × 10−1 | 3.8 × 10−1 | 1.2 × 10+3 | 2.7 × 10−1 |
| GW190421_213856 | 3.0 × 10−1 | 1.9 × 10+0 | 6.6 × 10−3 | 6.1 × 10−3 | 7.7 × 10−4 | 1.8 × 10+0 | 1.4 × 10−2 |
| GW190503_185404 | 1.8 × 10−3 | 3.7 × 10−2 | < 7.9 × 10−5 | 2.5 × 10−3 | < 1.0 × 10−5 | 1.7 × 10−1 | 4.0 × 10−3 |
| GW190512_180714 | 8.8 × 10−3 | 3.8 × 10−5 | < 5.7 × 10−5 | 4.0 × 10+1 | < 1.0 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−4 |
| GW190513_205428 | − | 3.7 × 10−4 | < 5.7 × 10−5 | 5.0 × 10−2 | < 1.0 × 10−5 | 2.1 × 10−1 | 1.1 × 10−1 |
| GW190514_065416 | − | − | 5.3 × 10−1 | 1.1 × 10+0 | − | 7.6 × 10+2 | 9.2 × 10−1 |
| GW190517_055101 | 8.0 × 10−3 | 1.8 × 10−2 | < 5.7 × 10−5 | 8.7 × 10−4 | 9.6 × 10−4 | 2.7 × 10−2 | 1.9 × 10−3 |
| GW190519_153544 | 3.1 × 10−4 | < 1.8 × 10−5 | < 5.7 × 10−5 | < 1.1 × 10−4 | < 1.0 × 10−5 | 3.9 × 10−3 | 2.5 × 10−4 |
| GW190521 | 2.0 × 10−4 | 1.1 × 10+0 | − | 1.4 × 10−3 | 1.2 × 10−3 | 1.9 × 10−3 | 4.5 × 10−4 |
| GW190521_074359 | < 1.0 × 10−4 | < 1.8 × 10−5 | < 5.7 × 10−5 | < 2.3 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−4 |
| GW190602_175927 | 1.5 × 10−2 | − | 1.5 × 10−2 | 1.1 × 10−3 | 1.1 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−4 |
| GW190701_203306 | 3.2 × 10−1 | − | − | < 1.9 × 10−4 | 1.1 × 10−2 | 3.8 × 10−2 | 4.3 × 10−4 |
| GW190706_222641 | < 1.0 × 10−3 | 6.7 × 10−5 | 4.6 × 10−5 | < 1.1 × 10−4 | < 1.0 × 10−5 | 2.4 × 10−3 | 2.5 × 10−4 |
| GW190727_060333 | 8.8 × 10−2 | 3.5 × 10−5 | 3.7 × 10−5 | < 1.2 × 10−4 | < 1.0 × 10−5 | 4.5 × 10−4 | 2.7 × 10−4 |
| GW190731_140936 | − | − | 2.8 × 10−1 | 6.4 × 10−1 | 2.1 × 10−1 | 2.1 × 10+0 | 7.6 × 10−1 |
| GW190803_022701 | − | − | 2.7 × 10−2 | 1.7 × 10−1 | 3.2 × 10−2 | 3.0 × 10+0 | 3.2 × 10−1 |
| GW190828_063405 | < 9.6 × 10−4 | < 1.0 × 10−5 | < 3.3 × 10−5 | < 7.0 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−5 | < 1.0 × 10−4 |
| GW190915_235702 | < 1.0 × 10−4 | 8.6 × 10−4 | < 3.3 × 10−5 | 3.8 × 10−4 | < 1.0 × 10−5 | 4.7 × 10−1 | 2.2 × 10−4 |
| GW190929_012149 | − | − | − | 3.1 × 10−1 | 2.0 × 10−2 | 2.9 × 10+1 | 5.0 × 10−1 |
Notes. The cWB search algorithm used here is unchanged over GWTC-2. Candidates are sorted by GPS time, and the FAR is provided for each search algorithm. Template-based methods used in GWTC-2 comprise the PyCBC and GstLAL broad parameter space pipelines and the PyCBC BBH-focused pipeline, while the optimized algorithms applied in this search are labeled “IMBH”. The event names encode the UTC date with the time of the event given after the underscore, except for the individually published event GW190521. The GstLAL FAR values have been capped at 1.0 × 10−5 yr−1 and corresponding p̄ values have also been capped. For PyCBC events with FAR estimates limited by finite background statistics, an upper limit is stated. The IMBH combined search p values p̄ for each event are calculated from Eq. (6) using p values of the cWB, PyCBC-IMBH and GstLAL-IMBH searches. For details of the search configurations and event parameters, we refer the reader to Abbott et al. (2021a).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.