LIGO/Virgo/KAGRA Public Alerts
- More details about public alerts are provided in the LIGO/Virgo/KAGRA Alerts User Guide.
- Retractions are marked in red. Retraction means that the candidate was manually vetted and is no longer considered a candidate of interest.
- Less-significant events are marked in grey, and are not manually vetted. Consult the LVK Alerts User Guide for more information on significance in O4c.
- Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.
O4c Significant Detection Candidates: 54 (61 Total - 7 Retracted)
O4c Low Significance Detection Candidates: 1435 (Total)
Show All Public Events
| Event ID | Possible Source (Probability) | Significant | UTC | GCN | Location | FAR | Comments | GPS | S250929c | BBH (98%), Terrestrial (2%) | Yes |
1443140870.38Sept. 29, 2025 00:27:32 UTC |
GCN Circular Query Notices | VOE |
|
0.000000025282406335801 per 1.2534 years | 1443140870.38 | S250927cy | BBH (96%), Terrestrial (4%) | Yes |
1443029459.68Sept. 27, 2025 17:30:41 UTC |
GCN Circular Query Notices | VOE |
|
0.000000053133492337501.6768 per year | 1443029459.68 | S250927ck | BBH (98%), Terrestrial (2%) | Yes |
1443021906.94Sept. 27, 2025 15:24:48 UTC |
GCN Circular Query Notices | VOE |
|
0.000000031387398522451 per 1.0096 years | 1443021906.94 | S250917aq | BBH (>99%) | Yes |
1442150532.40Sept. 17, 2025 13:21:54 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000110416701 per 2.8699e+05 years | 1442150532.40 | S250912f | BBH (>99%) | Yes |
1441694426.84Sept. 12, 2025 06:40:08 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000287313371 per 1.1029e+05 years | 1441694426.84 | S250911ac | BBH (96%), Terrestrial (4%) | Yes |
1441612017.27Sept. 11, 2025 07:46:39 UTC |
GCN Circular Query Notices | VOE |
|
0.000000006018337100261 per 5.2653 years | 1441612017.27 |
|---|---|---|---|---|---|---|---|---|
| S250910b | BNS (78%), Terrestrial (22%) | Yes |
1441498095.24Sept. 10, 2025 00:07:57 UTC |
GCN Circular Query Notices | VOE |
|
0.000000055767637168781.7599 per year | RETRACTED | 1441498095.24 | S250908y | BBH (>99%) | Yes |
1441377286.96Sept. 8, 2025 14:34:28 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000114968211921 per 275.62 years | 1441377286.96 | S250906ca | BBH (>99%) | Yes |
1441196657.10Sept. 6, 2025 12:23:59 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000109702061 per 2.8886e+05 years | 1441196657.10 | S250904cv | BBH (>99%) | Yes |
1441029010.53Sept. 4, 2025 13:49:52 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000316754584221 per 100.04 years | 1441029010.53 | S250904br | BBH (>99%) | Yes |
1441016546.02Sept. 4, 2025 10:22:08 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000316754584221 per 100.04 years | 1441016546.02 | S250904ae | BBH (>99%) | Yes |
1440992005.67Sept. 4, 2025 03:33:07 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000316754584221 per 100.04 years | 1440992005.67 | S250901cb | BBH (>99%) | Yes |
1440788399.97Sept. 1, 2025 18:59:41 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000031926461 per 9.9253e+05 years | 1440788399.97 | S250830bp | BBH (>99%) | Yes |
1440584676.85Aug. 30, 2025 10:24:18 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000316754584221 per 100.04 years | 1440584676.85 | S250830m | BBH (98%), Terrestrial (2%) | Yes |
1440559647.03Aug. 30, 2025 03:27:09 UTC |
GCN Circular Query Notices | VOE |
|
0.000000011898580000001 per 2.6632 years | 1440559647.03 |
