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: 236 (263 Total - 27 Retracted)

O4 Low Significance Detection Candidates: 4647 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S231102w BBH (>99%) Yes 1382944674.37Nov. 2, 2023
07:17:36 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 5.4281e+14 years 1382944674.37
S231030av BNS (93%), NSBH (6%), Terrestrial (1%) Yes 1382705489.63Oct. 30, 2023
12:51:11 UTC
GCN Circular Query
Notices | VOE
0.000000042146865553151.3301 per year RETRACTED 1382705489.63
S231029y BBH (>99%) Yes 1382613326.75Oct. 29, 2023
11:15:08 UTC
GCN Circular Query
Notices | VOE
0.000000000216374429941 per 146.45 years 1382613326.75
S231028bg BBH (>99%) Yes 1382542224.25Oct. 28, 2023
15:30:06 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 4.1513e+22 years 1382542224.25
S231020bw BBH (>99%) Yes 1381860327.78Oct. 20, 2023
18:05:09 UTC
GCN Circular Query
Notices | VOE
0.000000000345242324421 per 91.785 years 1381860327.78
S231020ba BBH (91%), NSBH (8%) Yes 1381847405.58Oct. 20, 2023
14:29:47 UTC
GCN Circular Query
Notices | VOE
0.000000001267018336901 per 25.01 years 1381847405.58
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