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: 41 (45 Total - 4 Retracted)

O4a Low Significance Detection Candidates: 21 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S230630t BNS (50%), BBH (50%) Yes 1372191646.14June 30, 2023
20:20:28 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000701 per 4.5371e+10 years 1372191646.14
S230630o BNS (50%), BBH (50%) Yes 1372191084.74June 30, 2023
20:11:06 UTC
GCN Circular Query
Notices | VOE
0.000000000000000014591 per 2.1726e+09 years 1372191084.74
S230630n BNS (50%), BBH (50%) Yes 1372190995.86June 30, 2023
20:09:37 UTC
GCN Circular Query
Notices | VOE
0.000000000000000007881 per 4.0234e+09 years RETRACTED 1372190995.86
S230630m BNS (50%), BBH (50%) Yes 1372187946.75June 30, 2023
19:18:48 UTC
GCN Circular Query
Notices | VOE
0.000000000000000002221 per 1.4283e+10 years 1372187946.75
S230630k BNS (50%), BBH (50%) Yes 1372184264.89June 30, 2023
18:17:26 UTC
GCN Circular Query
Notices | VOE
0.000000000000000039991 per 7.9231e+08 years 1372184264.89
S230630h BNS (50%), BBH (50%) Yes 1372175265.57June 30, 2023
15:47:27 UTC
GCN Circular Query
Notices | VOE
0.000000000000000006931 per 4.5726e+09 years 1372175265.57
S230630g BNS (50%), BBH (50%) Yes 1372173160.34June 30, 2023
15:12:22 UTC
GCN Circular Query
Notices | VOE
0.000000000000000010401 per 3.0462e+09 years 1372173160.34
S230630e BNS (50%), BBH (50%) Yes 1372171934.45June 30, 2023
14:51:56 UTC
GCN Circular Query
Notices | VOE
0.000000000000000139131 per 2.2776e+08 years 1372171934.45
S230630c BNS (50%), BBH (50%) Yes 1372171825.25June 30, 2023
14:50:07 UTC
GCN Circular Query
Notices | VOE
0.000000000000000004351 per 7.2848e+09 years 1372171825.25
S230630a BNS (50%), BBH (50%) Yes 1372171513.20June 30, 2023
14:44:55 UTC
GCN Circular Query
Notices | VOE
0.000000000000000017771 per 1.7836e+09 years 1372171513.20
S230622ai BNS (50%), BBH (50%) Yes 1371499555.13June 22, 2023
20:05:37 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000721 per 4.408e+10 years 1371499555.13
S230622ag BNS (50%), BBH (50%) Yes 1371498166.91June 22, 2023
19:42:28 UTC
GCN Circular Query
Notices | VOE
0.000000000000000014781 per 2.1434e+09 years 1371498166.91
S230525g BNS (50%), BBH (50%) Yes 1369078181.07May 25, 2023
19:29:23 UTC
GCN Circular Query
Notices | VOE
0.000000000000000011311 per 2.8025e+09 years RETRACTED **

This is another public comment. 

** This is a comment to be made public
1369078181.07
S230614b Yes 1370742403.12June 14, 2023
01:46:25 UTC
GCN Circular Query
Notices | VOE
0.000000000000000047041 per 6.736e+08 years 1370742403.12
S230614a Yes 1370742403.12June 14, 2023
01:46:25 UTC
GCN Circular Query
Notices | VOE
0.000000000000000014511 per 2.184e+09 years 1370742403.12