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: 1659 (1659 Total - 0 Retracted)

O4 Low Significance Detection Candidates: 771 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S251002in NSBH (75%), BNS (25%) Yes 1443471241.78Oct. 2, 2025
20:13:43 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000001 per 2.185e+13 years 1443471241.78
S251002il NSBH (62%), Terrestrial (19%), BBH (18%) Yes 1443469193.89Oct. 2, 2025
19:39:35 UTC
GCN Circular Query
Notices | VOE
0.000000002074429980011 per 15.276 years 1443469193.89
S251002if Terrestrial (>99%) Yes 1443467401.98Oct. 2, 2025
19:09:43 UTC
GCN Circular Query
Notices | VOE
0.00001304522079669708411.68 per year 1443467401.98
S251002ib BNS (89%), Terrestrial (11%) Yes 1443466121.76Oct. 2, 2025
18:48:23 UTC
GCN Circular Query
Notices | VOE
0.000000000959213300001 per 33.035 years 1443466121.76
S251002hz BBH (97%), Terrestrial (3%) Yes 1443465370.63Oct. 2, 2025
18:35:52 UTC
GCN Circular Query
Notices | VOE
0.000000000946167402271 per 33.491 years 1443465370.63
S251002hq NSBH (>99%) Yes 1443463306.18Oct. 2, 2025
18:01:28 UTC
GCN Circular Query
Notices | VOE
0.000000000000000284441 per 1.1141e+08 years 1443463306.18
S251002hp NSBH (>99%) Yes 1443463049.95Oct. 2, 2025
17:57:11 UTC
GCN Circular Query
Notices | VOE
0.000000000000000284441 per 1.1141e+08 years 1443463049.95
S251002hj Terrestrial (97%), BNS (3%) Yes 1443462283.10Oct. 2, 2025
17:44:25 UTC
GCN Circular Query
Notices | VOE
0.000000083715555326702.6419 per year 1443462283.10
S251002hh Yes 1443461531.38Oct. 2, 2025
17:31:53 UTC
GCN Circular Query
Notices | VOE
0.000000001526480000001 per 20.759 years 1443461531.38
S251002hg BBH (50%), NSBH (48%), Terrestrial (2%) Yes 1443461513.91Oct. 2, 2025
17:31:35 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1443461513.91
S251002he BBH (97%), Terrestrial (3%) Yes 1443461258.14Oct. 2, 2025
17:27:20 UTC
GCN Circular Query
Notices | VOE
0.000000001536460000001 per 20.624 years 1443461258.14
S251002gn BBH (98%), Terrestrial (2%) Yes 1443455113.77Oct. 2, 2025
15:44:55 UTC
GCN Circular Query
Notices | VOE
0.000000011839870000001 per 2.6764 years 1443455113.77
S251002gj BBH (>99%) Yes 1443454346.13Oct. 2, 2025
15:32:08 UTC
GCN Circular Query
Notices | VOE
0.000000000000001776271 per 1.784e+07 years 1443454346.13
S251002gg NSBH (>99%) Yes 1443453321.81Oct. 2, 2025
15:15:03 UTC
GCN Circular Query
Notices | VOE
0.000000000004828154001 per 6563.2 years 1443453321.81
S251002gc Yes 1443452828.44Oct. 2, 2025
15:06:50 UTC
GCN Circular Query
Notices | VOE
0.000000000129229000001 per 245.21 years 1443452828.44