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 O4.
  • Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.

O4 Significant Detection Candidates: 219 (245 Total - 26 Retracted)

O4 Low Significance Detection Candidates: 4218 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
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
S250702n BBH (99%), Terrestrial (1%) Yes 1435498338.38July 2, 2025
13:32:00 UTC
GCN Circular Query
Notices | VOE
0.000000017471179567111 per 1.8137 years 1435498338.38
S250701bq BBH (>99%) Yes 1435447084.93July 1, 2025
23:17:46 UTC
GCN Circular Query
Notices | VOE
0.000000000000000042541 per 7.4498e+08 years 1435447084.93
S250701bp BBH (>99%) Yes 1435437298.86July 1, 2025
20:34:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000000031321 per 1.0116e+09 years 1435437298.86
S250629bs BBH (94%), Terrestrial (6%) Yes 1435234402.38June 29, 2025
12:13:04 UTC
GCN Circular Query
Notices | VOE
0.000000043286170000001.366 per year 1435234402.38