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 O4.
  • Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.

O4 Significant Detection Candidates: 97 (111 Total - 14 Retracted)

O4 Low Significance Detection Candidates: 1841 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S230814r BBH (93%), Terrestrial (7%) Yes 1376029178.46Aug. 14, 2023
06:19:20 UTC
GCN Circular Query
Notices | VOE
0.000000048102567262731.518 per year 1376029178.46
S230811n BBH (>99%) Yes 1375759294.29Aug. 11, 2023
03:21:16 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1375759294.29
S230810af BNS (99%) Yes 1375696885.57Aug. 10, 2023
10:01:07 UTC
GCN Circular Query
Notices | VOE
0.000000029046118399381 per 1.091 years RETRACTED 1375696885.57
S230808i Yes 1375502644.43Aug. 8, 2023
04:03:46 UTC
GCN Circular Query
Notices | VOE
0.000000000068514200001 per 462.5 years RETRACTED 1375502644.43
S230807f BBH (95%), Terrestrial (5%) Yes 1375476663.42Aug. 7, 2023
20:50:45 UTC
GCN Circular Query
Notices | VOE
0.000000071417573509802.2538 per year 1375476663.42
S230806ak BBH (>99%) Yes 1375389659.94Aug. 6, 2023
20:40:41 UTC
GCN Circular Query
Notices | VOE
0.000000002958345677551 per 10.711 years 1375389659.94
S230805x BBH (>99%) Yes 1375242187.97Aug. 5, 2023
03:42:49 UTC
GCN Circular Query
Notices | VOE
0.000000009185882942511 per 3.4497 years 1375242187.97
S230802aq BBH (90%), NSBH (6%), Terrestrial (3%) Yes 1375011257.96Aug. 2, 2023
11:33:59 UTC
GCN Circular Query
Notices | VOE
0.000000022274558490271 per 1.4226 years 1375011257.96
S230731an BBH (81%), NSBH (18%) Yes 1374875605.89July 31, 2023
21:53:07 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1374875605.89
S230729z BBH (>99%) Yes 1374654215.20July 29, 2023
08:23:17 UTC
GCN Circular Query
Notices | VOE
0.000000003393122427941 per 9.3389 years 1374654215.20
S230726a BBH (>99%) Yes 1374366598.06July 26, 2023
00:29:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000038320541 per 8.2692e+05 years 1374366598.06
S230723ac BBH (87%), Terrestrial (13%) Yes 1374142732.45July 23, 2023
10:18:34 UTC
GCN Circular Query
Notices | VOE
0.000000053302440000001.6821 per year 1374142732.45
S230715bw NSBH (91%), BBH (9%) Yes 1373483155.95July 15, 2023
19:05:37 UTC
GCN Circular Query
Notices | VOE
0.000000007843396154781 per 4.0401 years RETRACTED 1373483155.95
S230712a BBH (>99%) Yes 1373158455.74July 12, 2023
00:53:57 UTC
GCN Circular Query
Notices | VOE
0.000000000000003269081 per 9.6933e+06 years RETRACTED 1373158455.74
S230709bi BBH (>99%) Yes 1372940865.20July 9, 2023
12:27:27 UTC
GCN Circular Query
Notices | VOE
0.000000003060764756451 per 10.353 years 1372940865.20