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: 37 (43 Total - 6 Retracted)
O4c Low Significance Detection Candidates: 1049 (Total)
Show All Public Events
| Event ID | Possible Source (Probability) | Significant | UTC | GCN | Location | FAR | Comments | GPS | S250818t | BBH (>99%) | Yes |
1439518156.39Aug. 18, 2025 02:08:58 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000017160280001 per 1846.6 years | 1439518156.39 | S250814bg | Terrestrial (99%) | Yes |
1439192123.59Aug. 14, 2025 07:35:05 UTC |
GCN Circular Query Notices | VOE |
|
0.000119702414178215603777.5 per year | 1439192123.59 | S250813k | BBH (>99%) | Yes |
1439086338.44Aug. 13, 2025 02:12:00 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000126053903431 per 251.39 years | 1439086338.44 | S250810ck | BBH (>99%) | Yes |
1438871055.34Aug. 10, 2025 14:23:57 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000000000051 per 5.891e+11 years | 1438871055.34 | S250802dn | BBH (93%), Terrestrial (7%) | Yes |
1438201530.02Aug. 2, 2025 20:25:12 UTC |
GCN Circular Query Notices | VOE |
|
0.000000054941010000001.7338 per year | 1438201530.02 | S250727dc | BBH (>99%) | Yes |
1437681726.46July 27, 2025 20:01:48 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000000001121 per 2.8303e+10 years | 1437681726.46 | S250727cl | BBH (>99%) | Yes |
1437674627.65July 27, 2025 18:03:29 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000000000000041 per 7.9146e+11 years | 1437674627.65 | S250726ak | BBH (>99%) | Yes |
1437553713.37July 26, 2025 08:28:15 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000004675774001 per 6777.1 years | 1437553713.37 | S250725l | BBH (99%), Terrestrial (1%) | Yes |
1437452468.94July 25, 2025 04:20:50 UTC |
GCN Circular Query Notices | VOE |
|
0.000000029774930917091 per 1.0643 years | 1437452468.94 | S250725j | BBH (>99%) | Yes |
1437451802.25July 25, 2025 04:09:44 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000042556559491 per 744.61 years | 1437451802.25 |
|---|---|---|---|---|---|---|---|---|
| S250720j | Yes |
1437012926.46July 20, 2025 02:15:08 UTC |
GCN Circular Query Notices | VOE |
|
0.00003014051000000000951.16 per year | RETRACTED | 1437012926.46 | S250712cd | BBH (>99%) | Yes |
1436365550.33July 12, 2025 14:25:32 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000026872820001 per 1179.2 years | 1436365550.33 | S250711q | BBH (>99%) | Yes |
1436239663.11July 11, 2025 03:27:25 UTC |
GCN Circular Query Notices | VOE |
|
0.000000001574476618301 per 20.126 years | 1436239663.11 | S250705cb | BBH (99%) | Yes |
1435768214.84July 5, 2025 16:29:56 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000950263752671 per 33.347 years | 1435768214.84 | S250704ab | BBH (82%), NSBH (17%) | Yes |
1435638666.04July 4, 2025 04:30:48 UTC |
GCN Circular Query Notices | VOE |
|
0.000000000316754584221 per 100.04 years | 1435638666.04 |
