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 O4a.
  • Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.

O4a Significant Detection Candidates: 81 (92 Total - 11 Retracted)

O4a Low Significance Detection Candidates: 1610 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S230707ai BBH (95%), Terrestrial (5%) Yes 1372768865.35July 7, 2023
12:40:47 UTC
GCN Circular Query
Notices | VOE
0.000000013764580000001 per 2.3021 years 1372768865.35
S230706ah BBH (97%), Terrestrial (3%) Yes 1372675431.16July 6, 2023
10:43:33 UTC
GCN Circular Query
Notices | VOE
0.000000042613558263151.3448 per year 1372675431.16
S230704f BBH (>99%) Yes 1372471949.22July 4, 2023
02:12:11 UTC
GCN Circular Query
Notices | VOE
0.000000002815522679531 per 11.255 years 1372471949.22
S230702an BBH (>99%) Yes 1372359311.74July 2, 2023
18:54:53 UTC
GCN Circular Query
Notices | VOE
0.000000000001533216961 per 20668 years 1372359311.74
S230630bq BBH (97%), Terrestrial (3%) Yes 1372203950.41June 30, 2023
23:45:32 UTC
GCN Circular Query
Notices | VOE
0.000000007732377000001 per 4.0981 years 1372203950.41
S230630am BBH (98%), Terrestrial (2%) Yes 1372165104.90June 30, 2023
12:58:06 UTC
GCN Circular Query
Notices | VOE
0.000000024127874466891 per 1.3133 years 1372165104.90
S230628ax BBH (>99%) Yes 1372029138.37June 28, 2023
23:12:00 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1372029138.37
S230627c NSBH (49%), BBH (48%), Terrestrial (3%) Yes 1371866035.82June 27, 2023
01:53:37 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1371866035.82
S230624av BBH (95%), Terrestrial (5%) Yes 1371641481.77June 24, 2023
11:31:03 UTC
GCN Circular Query
Notices | VOE
0.000000013001850000001 per 2.4372 years 1371641481.77
S230622ba BBH (87%), Terrestrial (13%) Yes 1371479754.73June 22, 2023
14:35:36 UTC
GCN Circular Query
Notices | VOE
0.000000051795560000001.6345 per year RETRACTED 1371479754.73
S230609u BBH (96%), Terrestrial (4%) Yes 1370328616.28June 9, 2023
06:49:58 UTC
GCN Circular Query
Notices | VOE
0.000000010041530000001 per 3.1557 years 1370328616.28
S230608as BBH (>99%) Yes 1370292665.16June 8, 2023
20:50:47 UTC
GCN Circular Query
Notices | VOE
0.000000000136921370791 per 231.43 years 1370292665.16
S230606d BBH (>99%) Yes 1370047403.79June 6, 2023
00:43:05 UTC
GCN Circular Query
Notices | VOE
0.000000011403165032081 per 2.7789 years 1370047403.79
S230605o BBH (99%), Terrestrial (1%) Yes 1369983241.49June 5, 2023
06:53:43 UTC
GCN Circular Query
Notices | VOE
0.000000004521287000001 per 7.0086 years 1369983241.49
S230601bf BBH (>99%) Yes 1369694512.10June 1, 2023
22:41:34 UTC
GCN Circular Query
Notices | VOE
0.000000000000001713571 per 1.8492e+07 years 1369694512.10