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 O4a.
  • Less-significant events are not shown by default. Press "Show All Public Events" to show significant and less-significant events.

O4a Significant Detection Candidates: 81 (92 Total - 11 Retracted)

O4a Low Significance Detection Candidates: 1610 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS
S231118ab BBH (99%), Terrestrial (1%) Yes 1384326860.24Nov. 18, 2023
07:14:02 UTC
GCN Circular Query
Notices | VOE
0.000000018952725611141 per 1.672 years 1384326860.24
S231118d BBH (>99%) Yes 1384304204.84Nov. 18, 2023
00:56:26 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1384304204.84
S231114n BBH (>99%) Yes 1383971549.25Nov. 14, 2023
04:32:11 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1383971549.25
S231113bw BBH (96%), Terrestrial (4%) Yes 1383941075.91Nov. 13, 2023
20:04:17 UTC
GCN Circular Query
Notices | VOE
0.000000013620447121651 per 2.3265 years 1383941075.91
S231113bb BBH (96%), Terrestrial (4%) Yes 1383913601.88Nov. 13, 2023
12:26:23 UTC
GCN Circular Query
Notices | VOE
0.000000055969890484001.7663 per year 1383913601.88
S231112ag BBH (>99%) Yes 1383822141.44Nov. 12, 2023
11:02:03 UTC
GCN Circular Query
Notices | VOE
0.000000000000010608401 per 2.9871e+06 years RETRACTED 1383822141.44
S231110g BBH (97%), Terrestrial (3%) Yes 1383624218.22Nov. 10, 2023
04:03:20 UTC
GCN Circular Query
Notices | VOE
0.000000019287428543181 per 1.6429 years 1383624218.22
S231108u BBH (>99%) Yes 1383483120.46Nov. 8, 2023
12:51:42 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1383483120.46
S231104ac BBH (>99%) Yes 1383140076.94Nov. 4, 2023
13:34:18 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1383140076.94
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