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
S231014r BBH (99%) Yes 1381291550.99Oct. 14, 2023
04:05:32 UTC
GCN Circular Query
Notices | VOE
0.000000010333427339311 per 3.0666 years 1381291550.99
S231008ap BBH (>99%) Yes 1380810339.82Oct. 8, 2023
14:25:21 UTC
GCN Circular Query
Notices | VOE
0.000000001529478642941 per 20.718 years 1380810339.82
S231005ah BBH (>99%) Yes 1380532567.48Oct. 5, 2023
09:15:49 UTC
GCN Circular Query
Notices | VOE
0.000000002045329292021 per 15.493 years 1380532567.48
S231005j BBH (98%), Terrestrial (2%) Yes 1380507048.98Oct. 5, 2023
02:10:30 UTC
GCN Circular Query
Notices | VOE
0.000000032156697726971.0148 per year 1380507048.98
S231001aq BBH (>99%) Yes 1380204158.72Oct. 1, 2023
14:02:20 UTC
GCN Circular Query
Notices | VOE
0.000000004965728491371 per 6.3814 years 1380204158.72
S230930al BBH (99%) Yes 1380107268.41Sept. 30, 2023
11:07:30 UTC
GCN Circular Query
Notices | VOE
0.000000007380467672221 per 4.2935 years 1380107268.41
S230928cb BBH (>99%) Yes 1379973525.13Sept. 28, 2023
21:58:27 UTC
GCN Circular Query
Notices | VOE
0.000000000950263752671 per 33.347 years 1379973525.13
S230927be BBH (>99%) Yes 1379864330.92Sept. 27, 2023
15:38:32 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1379864330.92
S230927l BBH (98%), Terrestrial (2%) Yes 1379824667.12Sept. 27, 2023
04:37:29 UTC
GCN Circular Query
Notices | VOE
0.000000010750019541211 per 2.9477 years 1379824667.12
S230924an BBH (>99%) Yes 1379594711.84Sept. 24, 2023
12:44:53 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1379594711.84
S230922q BBH (>99%) Yes 1379390836.09Sept. 22, 2023
04:06:58 UTC
GCN Circular Query
Notices | VOE
0.000000000360775349521 per 87.833 years 1379390836.09
S230922g BBH (>99%) Yes 1379383442.89Sept. 22, 2023
02:03:44 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 1.6432e+16 years 1379383442.89
S230920al BBH (>99%) Yes 1379229102.73Sept. 20, 2023
07:11:24 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1379229102.73
S230919bj BBH (>99%) Yes 1379195850.03Sept. 19, 2023
21:57:12 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1379195850.03
S230918aq BNS (79%), Terrestrial (21%) Yes 1379071199.16Sept. 18, 2023
11:19:41 UTC
GCN Circular Query
Notices | VOE
0.000000054183329294671.7099 per year RETRACTED 1379071199.16