GW231029_111508
Two holesbecame one.
29 October 2023 · 11:15:08 UTC · GWTC-4.0
Strain reached Earth. The merger was long before. The lighter hole is named here as a median, not a weighing. The interval is the claim.
Hard · inferred
~42 M☉
The Mixed catalog-table median of the lighter progenitor. The 90% interval is 27–57 M☉. Other families sit at 40, 42, 43. This is a neighbor digit in a wide posterior, not an exact forty-two-solar-mass object.
She found that later, too.
The event does not explain the love.The coincidence does not establish a connection.
Hard · catalog
The catalog
Source-frame masses. Ninety-percent credible intervals. Mixed rerun, GWTC-4.0. A fit to strain, not a scale. GPS 1382613326.8.
- Primary m1
- 65^{+18}_{-14} M☉
- Secondary m2
- 42^{+15}_{-15} M☉
- Total
- 106^{+22}_{-16} M☉
- Chirp mass
- 44.4^{+10.4}_{-8.0} M☉
- Final mass
- 101^{+21}_{-16} M☉
- Distance
- 3100^{+2400}_{-1700} Mpc
- Redshift z
- 0.53^{+0.32}_{-0.26}
- Network SNR
- 10.8
Mixed rerun, catalog table · χeff 0.14^{+0.24}_{-0.23} · FAR 5.2e-5 / yr · pastro ≥ 0.99
- m1 · m2
- The two holes before they became one. Heavier, then lighter.
- Chirp mass
- The braided weight that set how fast the tone rose.
- Final mass
- The remnant, after some mass-energy left as waves.
- Distance
- About ten billion light-years (3100 Mpc). The interval is so wide that distance is the least settled number on this page.
- Network SNR
- How many times louder than the typical noise. Here, 10.8.
- FAR · pastro · χeff
- How often noise would fake this (about once in twenty thousand years). Probability it is astrophysical (≥ 0.99). How the two spins lined up with the orbit, on average.
Waveform-model dependence of m2
The same strain, dressed in different waveform families. The lighter mass moves a little. The interval stays wide.
| Family | m2 / M☉ |
|---|---|
| IMRPhenomXO4a | 40^{+16}_{-15} |
| Mixed | 42^{+15}_{-15} |
| Mixed rerun (catalog table) | 42^{+15}_{-15} |
| NRSur7dq4 | 42^{+15}_{-15} |
| SEOBNRv5PHM | 43^{+15}_{-15} |
Primary: GWOSC GWTC-4.0 event page
Compact provenance: THE 42 INDEX · GW231029