Table 3.
Average observation time (years) needed to detect one BNS merger with different EM counterpart levels.
| Electromagnetic information level |
|||||
|---|---|---|---|---|---|
| GW run | Level 1 | Level 2 | Level 3 | ||
| WP15 | G16 | WP15 | G16 | ||
| O2-like |
 |
 |
 |
 |
 |
| O3-like |
 |
 |
 |
 |
 |
| O4-like |
 |
 |
 |
 |
 |
Notes. Observation times are computed assuming 
Gpc−3 yr−1, the best estimate after the first half of the O3 run. We assume a network S/N of at least 14 for GW detection; relaxing to a threshold of 8 would decrease these waiting times by a factor of ∼6 (see text for details).
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