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
S251003dz Terrestrial (>99%) Yes 1443553418.23Oct. 3, 2025
19:03:20 UTC
GCN Circular Query
Notices | VOE
0.000061144087656585731929.6 per year 1443553418.23
S251003ds BBH (>99%) Yes 1443551114.20Oct. 3, 2025
18:24:56 UTC
GCN Circular Query
Notices | VOE
0.000000000064019000001 per 494.98 years 1443551114.20
S251003dr NSBH (91%), BNS (9%) Yes 1443550858.20Oct. 3, 2025
18:20:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000801 per 3.9755e+10 years 1443550858.20
S251003do Yes 1443548833.56Oct. 3, 2025
17:46:55 UTC
GCN Circular Query
Notices | VOE
0.000000000129229000001 per 245.21 years 1443548833.56
S251003dj BBH (>99%) Yes 1443548042.14Oct. 3, 2025
17:33:44 UTC
GCN Circular Query
Notices | VOE
0.000000000000279293901 per 1.1346e+05 years 1443548042.14
S251003dh BBH (57%), NSBH (42%), Terrestrial (2%) Yes 1443547529.93Oct. 3, 2025
17:25:11 UTC
GCN Circular Query
Notices | VOE
0.000000000946167402271 per 33.491 years 1443547529.93
S251003dc Yes 1443547018.23Oct. 3, 2025
17:16:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000793812771 per 39919 years 1443547018.23
S251003cq BBH (95%), Terrestrial (5%) Yes 1443545226.22Oct. 3, 2025
16:46:48 UTC
GCN Circular Query
Notices | VOE
0.000000036533180000001.1529 per year 1443545226.22
S251003cm Terrestrial (59%), BNS (23%), NSBH (18%) Yes 1443544970.02Oct. 3, 2025
16:42:32 UTC
GCN Circular Query
Notices | VOE
0.000000013148510000001 per 2.41 years 1443544970.02
S251003cl BBH (84%), NSBH (16%) Yes 1443544457.89Oct. 3, 2025
16:33:59 UTC
GCN Circular Query
Notices | VOE
0.000000000000000976481 per 3.2451e+07 years 1443544457.89
S251003cj BBH (>99%) Yes 1443543201.63Oct. 3, 2025
16:13:03 UTC
GCN Circular Query
Notices | VOE
0.000000000064019000001 per 494.98 years 1443543201.63
S251003ci BBH (>99%) Yes 1443543178.01Oct. 3, 2025
16:12:40 UTC
GCN Circular Query
Notices | VOE
0.000000000026830790001 per 1181 years 1443543178.01
S251003cd NSBH (97%), BNS (2%) Yes 1443542665.83Oct. 3, 2025
16:04:07 UTC
GCN Circular Query
Notices | VOE
0.000000000000031684001 per 1.0001e+06 years 1443542665.83
S251003cb Terrestrial (77%), BNS (23%) Yes 1443541129.98Oct. 3, 2025
15:38:31 UTC
GCN Circular Query
Notices | VOE
0.000000050997488060131.6094 per year 1443541129.98
S251003bz BBH (98%), NSBH (2%) Yes 1443540362.14Oct. 3, 2025
15:25:44 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000101 per 3.2633e+11 years 1443540362.14