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: 148 (165 Total - 17 Retracted)

O4 Low Significance Detection Candidates: 2552 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S240104bl BBH (>99%) Yes 1388422190.63Jan. 4, 2024
16:49:32 UTC
GCN Circular Query
Notices | VOE
0.000000000000000035551 per 8.9137e+08 years 1388422190.63
S231231ag BBH (>99%) Yes 1388072434.67Dec. 31, 2023
15:40:16 UTC
GCN Circular Query
Notices | VOE
0.000000000000008354031 per 3.7932e+06 years 1388072434.67
S231226av BBH (>99%) Yes 1387620938.31Dec. 26, 2023
10:15:20 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 2.8446e+42 years 1387620938.31
S231224e BBH (>99%) Yes 1387421019.97Dec. 24, 2023
02:43:21 UTC
GCN Circular Query
Notices | VOE
0.000000001527968000001 per 20.739 years 1387421019.97
S231223j BBH (>99%) Yes 1387337334.05Dec. 23, 2023
03:28:36 UTC
GCN Circular Query
Notices | VOE
0.000000001111445175141 per 28.511 years 1387337334.05
S231213ap BBH (>99%) Yes 1386501275.91Dec. 13, 2023
11:14:17 UTC
GCN Circular Query
Notices | VOE
0.000000000633509168451 per 50.02 years 1386501275.91
S231206cc BBH (>99%) Yes 1385941159.50Dec. 6, 2023
23:39:01 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 1.6402e+27 years 1385941159.50
S231206ca BBH (>99%) Yes 1385940712.53Dec. 6, 2023
23:31:34 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1385940712.53
S231129ac BBH (99%), Terrestrial (1%) Yes 1385281083.64Nov. 29, 2023
08:17:45 UTC
GCN Circular Query
Notices | VOE
0.000000017647269585521 per 1.7956 years 1385281083.64
S231127cg BBH (>99%) Yes 1385139198.88Nov. 27, 2023
16:53:00 UTC
GCN Circular Query
Notices | VOE
0.000000005814757056181 per 5.4496 years 1385139198.88
S231123cg BBH (>99%) Yes 1384782888.63Nov. 23, 2023
13:54:30 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1384782888.63
S231119u BBH (95%), Terrestrial (5%) Yes 1384415586.09Nov. 19, 2023
07:52:48 UTC
GCN Circular Query
Notices | VOE
0.000000074307040909582.345 per year 1384415586.09
S231118an BBH (74%), Terrestrial (24%), NSBH (1%) Yes 1384333580.01Nov. 18, 2023
09:06:02 UTC
GCN Circular Query
Notices | VOE
0.000000074763157442702.3593 per year 1384333580.01
S231118ab BBH (99%), Terrestrial (1%) Yes 1384326860.24Nov. 18, 2023
07:14:02 UTC
GCN Circular Query
Notices | VOE
0.000000018952725611141 per 1.672 years 1384326860.24
S231118d BBH (>99%) Yes 1384304204.84Nov. 18, 2023
00:56:26 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1384304204.84