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: 36 (36 Total - 0 Retracted)

O4a Low Significance Detection Candidates: 11 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S230929i BBH (>99%) Yes 1380040680.55Sept. 29, 2023
16:37:42 UTC
GCN Circular Query
Notices | VOE
0.000000000000000030311 per 1.0456e+09 years 1380040680.55
S230929h BBH (>99%) Yes 1380040671.92Sept. 29, 2023
16:37:33 UTC
GCN Circular Query
Notices | VOE
0.000000000000000167681 per 1.8898e+08 years 1380040671.92
S230929g BBH (>99%) Yes 1380040666.71Sept. 29, 2023
16:37:28 UTC
GCN Circular Query
Notices | VOE
0.000000000000000047501 per 6.6707e+08 years 1380040666.71
S230929f BBH (>99%) Yes 1380040663.10Sept. 29, 2023
16:37:25 UTC
GCN Circular Query
Notices | VOE
0.000000000000000034401 per 9.2127e+08 years 1380040663.10
S230929e BBH (>99%) Yes 1380040656.00Sept. 29, 2023
16:37:18 UTC
GCN Circular Query
Notices | VOE
0.000000000000000015261 per 2.0759e+09 years 1380040656.00
S230929d BBH (>99%) Yes 1380040653.00Sept. 29, 2023
16:37:15 UTC
GCN Circular Query
Notices | VOE
0.000000000000000135821 per 2.3331e+08 years 1380040653.00
S230929c BBH (>99%) Yes 1380040650.08Sept. 29, 2023
16:37:12 UTC
GCN Circular Query
Notices | VOE
0.000000000000000137971 per 2.2967e+08 years 1380040650.08
S230929b BBH (>99%) Yes 1380040647.47Sept. 29, 2023
16:37:09 UTC
GCN Circular Query
Notices | VOE
0.000000000000000079951 per 3.9632e+08 years 1380040647.47
S230929a BBH (>99%) Yes 1380040641.80Sept. 29, 2023
16:37:03 UTC
GCN Circular Query
Notices | VOE
0.000000000000000056711 per 5.5881e+08 years 1380040641.80
S230702a BNS (50%), BBH (50%) Yes 1372295466.08July 2, 2023
01:10:48 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000031 per 9.8549e+11 years 1372295466.08
S230630a BNS (50%), BBH (50%) Yes 1372195943.17June 30, 2023
21:32:05 UTC
GCN Circular Query
Notices | VOE
0.000000000000000026261 per 1.2069e+09 years 1372195943.17
S230622b BNS (50%), BBH (50%) Yes 1371503621.91June 22, 2023
21:13:23 UTC
GCN Circular Query
Notices | VOE
0.000000000000000001721 per 1.8385e+10 years 1371503621.91
S230622a BNS (50%), BBH (50%) Yes 1371503437.36June 22, 2023
21:10:19 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000051 per 6.9989e+11 years 1371503437.36
S230620m BNS (50%), BBH (50%) Yes 1371330948.57June 20, 2023
21:15:30 UTC
GCN Circular Query
Notices | VOE
0.000000000000000006721 per 4.7133e+09 years 1371330948.57
S230620k BNS (50%), BBH (50%) Yes 1371320286.10June 20, 2023
18:17:48 UTC
GCN Circular Query
Notices | VOE
0.000000000000000034871 per 9.0874e+08 years 1371320286.10