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 O4c.
  • Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.

O4c Significant Detection Candidates: 1192 (1192 Total - 0 Retracted)

O4c Low Significance Detection Candidates: 543 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S251020ac BBH (>99%) Yes 1444961674.12Oct. 20, 2025
02:14:16 UTC
GCN Circular Query
Notices | VOE
0.000000000027012500001 per 1173.1 years 1444961674.12
S251020u BBH (52%), NSBH (48%) Yes 1444960138.08Oct. 20, 2025
01:48:40 UTC
GCN Circular Query
Notices | VOE
0.000000000000073370021 per 4.3189e+05 years 1444960138.08
S251020t BBH (>99%) Yes 1444959626.21Oct. 20, 2025
01:40:08 UTC
GCN Circular Query
Notices | VOE
0.000000000077437940001 per 409.21 years 1444959626.21
S251020s BBH (>99%) Yes 1444958602.13Oct. 20, 2025
01:23:04 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000041 per 7.9146e+11 years 1444958602.13
S251020r BNS (67%), NSBH (33%) Yes 1444958090.06Oct. 20, 2025
01:14:32 UTC
GCN Circular Query
Notices | VOE
0.000000000004402987001 per 7197 years 1444958090.06
S251020q BBH (63%), NSBH (37%) Yes 1444957065.94Oct. 20, 2025
00:57:27 UTC
GCN Circular Query
Notices | VOE
0.000000000000048356151 per 6.5531e+05 years 1444957065.94
S251020o Yes 1444956826.77Oct. 20, 2025
00:53:28 UTC
GCN Circular Query
Notices | VOE
0.000000000129229000001 per 245.21 years 1444956826.77
S251020l Terrestrial (>99%) Yes 1444956554.25Oct. 20, 2025
00:48:56 UTC
GCN Circular Query
Notices | VOE
0.000000007285355437161 per 4.3496 years 1444956554.25
S251020g Terrestrial (78%), BNS (13%), NSBH (9%) Yes 1444955018.18Oct. 20, 2025
00:23:20 UTC
GCN Circular Query
Notices | VOE
0.000000034364080000001.0844 per year 1444955018.18
S251019gi BBH (>99%) Yes 1444952713.92Oct. 19, 2025
23:44:55 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000041 per 7.9146e+11 years 1444952713.92
S251019gh NSBH (98%), BNS (2%) Yes 1444952457.87Oct. 19, 2025
23:40:39 UTC
GCN Circular Query
Notices | VOE
0.000000000000000001321 per 2.4043e+10 years 1444952457.87
S251019ge BNS (98%), Terrestrial (2%) Yes 1444952457.84Oct. 19, 2025
23:40:39 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1444952457.84
S251019fx Terrestrial (58%), NSBH (34%), BNS (8%) Yes 1444950665.77Oct. 19, 2025
23:10:47 UTC
GCN Circular Query
Notices | VOE
0.000000006335091684491 per 5.002 years 1444950665.77
S251019fu NSBH (86%), BBH (9%), Terrestrial (5%) Yes 1444949897.85Oct. 19, 2025
22:57:59 UTC
GCN Circular Query
Notices | VOE
0.000000035029240000001.1054 per year 1444949897.85
S251019fp NSBH (58%), Terrestrial (25%), BNS (17%) Yes 1444948362.15Oct. 19, 2025
22:32:24 UTC
GCN Circular Query
Notices | VOE
0.000000002685716000001 per 11.799 years 1444948362.15