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
S230929au BBH (>99%) Yes 1380036329.18Sept. 29, 2023
15:25:11 UTC
GCN Circular Query
Notices | VOE
0.000000000000000046161 per 6.865e+08 years 1380036329.18
S230929at BBH (>99%) Yes 1380036322.74Sept. 29, 2023
15:25:04 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000151 per 2.0543e+11 years RETRACTED 1380036322.74
S230929as BBH (>99%) Yes 1380036316.60Sept. 29, 2023
15:24:58 UTC
GCN Circular Query
Notices | VOE
0.000000000000000065001 per 4.8751e+08 years 1380036316.60
S230929ar BBH (>99%) Yes 1380036310.82Sept. 29, 2023
15:24:52 UTC
GCN Circular Query
Notices | VOE
0.000000000000000019271 per 1.6448e+09 years 1380036310.82
S230929aq BBH (>99%) Yes 1380036305.07Sept. 29, 2023
15:24:47 UTC
GCN Circular Query
Notices | VOE
0.000000000000000050811 per 6.2371e+08 years 1380036305.07
S230929ap BBH (>99%) Yes 1380036299.74Sept. 29, 2023
15:24:41 UTC
GCN Circular Query
Notices | VOE
0.000000000000000183311 per 1.7286e+08 years 1380036299.74
S230929ao BBH (>99%) Yes 1380036294.49Sept. 29, 2023
15:24:36 UTC
GCN Circular Query
Notices | VOE
0.000000000000000078041 per 4.0607e+08 years 1380036294.49
S230929an BBH (>99%) Yes 1380036289.39Sept. 29, 2023
15:24:31 UTC
GCN Circular Query
Notices | VOE
0.000000000000000042131 per 7.5223e+08 years 1380036289.39
S230929am BBH (>99%) Yes 1380036284.37Sept. 29, 2023
15:24:26 UTC
GCN Circular Query
Notices | VOE
0.000000000000000151841 per 2.087e+08 years 1380036284.37
S230929al BBH (>99%) Yes 1380036279.71Sept. 29, 2023
15:24:21 UTC
GCN Circular Query
Notices | VOE
0.000000000000000078981 per 4.0123e+08 years 1380036279.71
S230929ak BBH (>99%) Yes 1380036275.13Sept. 29, 2023
15:24:17 UTC
GCN Circular Query
Notices | VOE
0.000000000000000015091 per 2.1006e+09 years 1380036275.13
S230929aj BBH (>99%) Yes 1380036270.96Sept. 29, 2023
15:24:12 UTC
GCN Circular Query
Notices | VOE
0.000000000000000181241 per 1.7484e+08 years 1380036270.96
S230929ai BBH (>99%) Yes 1380036267.06Sept. 29, 2023
15:24:09 UTC
GCN Circular Query
Notices | VOE
0.000000000000000228451 per 1.3871e+08 years 1380036267.06
S230929ah BBH (>99%) Yes 1380036263.34Sept. 29, 2023
15:24:05 UTC
GCN Circular Query
Notices | VOE
0.000000000000000041141 per 7.7031e+08 years 1380036263.34
S230929ag BBH (>99%) Yes 1380036259.77Sept. 29, 2023
15:24:01 UTC
GCN Circular Query
Notices | VOE
0.000000000000000075341 per 4.2062e+08 years 1380036259.77