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: 42 (46 Total - 4 Retracted)

O4 Low Significance Detection Candidates: 21 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
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
S230929af BBH (>99%) Yes 1380036256.46Sept. 29, 2023
15:23:58 UTC
GCN Circular Query
Notices | VOE
0.000000000000000003231 per 9.8008e+09 years 1380036256.46
S230929ae BBH (>99%) Yes 1380036253.43Sept. 29, 2023
15:23:55 UTC
GCN Circular Query
Notices | VOE
0.000000000000000021841 per 1.4506e+09 years 1380036253.43
S230929ad BBH (>99%) Yes 1380036250.81Sept. 29, 2023
15:23:52 UTC
GCN Circular Query
Notices | VOE
0.000000000000000122461 per 2.5877e+08 years 1380036250.81
S230929ac BBH (>99%) Yes 1380036248.29Sept. 29, 2023
15:23:50 UTC
GCN Circular Query
Notices | VOE
0.000000000000000030951 per 1.0238e+09 years 1380036248.29
S230929ab BBH (>99%) Yes 1380036246.01Sept. 29, 2023
15:23:48 UTC
GCN Circular Query
Notices | VOE
0.000000000000000214751 per 1.4756e+08 years 1380036246.01
S230929aa BBH (>99%) Yes 1380036244.04Sept. 29, 2023
15:23:46 UTC
GCN Circular Query
Notices | VOE
0.000000000000000076931 per 4.1189e+08 years 1380036244.04
S230929z BBH (>99%) Yes 1380036242.28Sept. 29, 2023
15:23:44 UTC
GCN Circular Query
Notices | VOE
0.000000000000000145021 per 2.1851e+08 years 1380036242.28
S230929y BBH (>99%) Yes 1380036240.76Sept. 29, 2023
15:23:42 UTC
GCN Circular Query
Notices | VOE
0.000000000000000110201 per 2.8756e+08 years 1380036240.76
S230929x BBH (>99%) Yes 1380036238.91Sept. 29, 2023
15:23:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000000116771 per 2.7138e+08 years 1380036238.91
S230929v BBH (>99%) Yes 1380036084.01Sept. 29, 2023
15:21:06 UTC
GCN Circular Query
Notices | VOE
0.000000000000000095351 per 3.3234e+08 years 1380036084.01
S230929u BBH (>99%) Yes 1380036014.30Sept. 29, 2023
15:19:56 UTC
GCN Circular Query
Notices | VOE
0.000000000000000030361 per 1.0437e+09 years 1380036014.30
S230630x BBH (>99%) Yes 1372193521.23June 30, 2023
20:51:43 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000211 per 1.5171e+11 years 1372193521.23
S230630w BNS (50%), BBH (50%) Yes 1372192498.68June 30, 2023
20:34:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000000012271 per 2.582e+09 years 1372192498.68
S230630v BBH (>99%) Yes 1372191906.63June 30, 2023
20:24:48 UTC
GCN Circular Query
Notices | VOE
0.000000000000000004471 per 7.0812e+09 years 1372191906.63