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: 101 (115 Total - 14 Retracted)

O4 Low Significance Detection Candidates: 1905 (Total)


Show All Public Events

Event ID Possible Source (Probability) Significant UTC GCN Location FAR Comments GPS Ω Scan
S240527fv BBH (99%) Yes 1400886568.38May 27, 2024
23:09:10 UTC
GCN Circular Query
Notices | VOE
0.000000014253956290101 per 2.2231 years 1400886568.38 Ω H1
Ω L1
Ω V1
S240527en BBH (>99%) Yes 1400870087.06May 27, 2024
18:34:29 UTC
GCN Circular Query
Notices | VOE
0.000000002534036673801 per 12.505 years 1400870087.06 Ω H1
Ω L1
Ω V1
S240525p BBH (99%), Terrestrial (1%) Yes 1400641948.64May 25, 2024
03:12:10 UTC
GCN Circular Query
Notices | VOE
0.000000016772763017811 per 1.8893 years 1400641948.64 Ω H1
Ω L1
Ω V1
S240520cv BBH (97%), NSBH (3%) Yes 1400276194.97May 20, 2024
21:36:16 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1400276194.97 Ω H1
Ω L1
Ω V1
S240515m BBH (>99%) Yes 1399769599.11May 15, 2024
00:53:01 UTC
GCN Circular Query
Notices | VOE
0.000000000000000000011 per 6.0109e+12 years 1399769599.11 Ω H1
Ω L1
Ω V1
S240514x BBH (>99%) Yes 1399724251.72May 14, 2024
12:17:13 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1399724251.72 Ω H1
Ω L1
Ω V1
S240514c BBH (99%) Yes 1399709019.05May 14, 2024
08:03:21 UTC
GCN Circular Query
Notices | VOE
0.000000009619912638971 per 3.294 years 1399709019.05 Ω H1
Ω L1
Ω V1
S240513ei BBH (>99%) Yes 1399660400.90May 13, 2024
18:33:02 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1399660400.90 Ω H1
Ω L1
Ω V1
S240512r BBH (98%), NSBH (2%) Yes 1399516917.15May 12, 2024
02:41:39 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1399516917.15 Ω H1
Ω L1
Ω V1
S240511i BBH (>99%) Yes 1399432526.00May 11, 2024
03:15:07 UTC
GCN Circular Query
Notices | VOE
0.000000000316754584221 per 100.04 years 1399432526.00 Ω H1
Ω L1
Ω V1
S240507p BBH (>99%) Yes 1399090610.35May 7, 2024
04:16:32 UTC
GCN Circular Query
Notices | VOE
0.000000000633509168451 per 50.02 years 1399090610.35 Ω H1
Ω L1
Ω V1
S240505av BBH (99%), Terrestrial (1%) Yes 1398951370.58May 5, 2024
13:35:52 UTC
GCN Circular Query
Notices | VOE
0.000000022844626248331 per 1.3871 years 1398951370.58 Ω H1
Ω L1
Ω V1
S240501an BBH (>99%) Yes 1398569752.92May 1, 2024
03:35:34 UTC
GCN Circular Query
Notices | VOE
0.000000000421517035091 per 75.176 years 1398569752.92 Ω H1
Ω L1
Ω V1
S240430ca BBH (96%), Terrestrial (4%) Yes 1398504935.38April 30, 2024
09:35:17 UTC
GCN Circular Query
Notices | VOE
0.000000074521646897492.3517 per year 1398504935.38 Ω H1
Ω L1
Ω V1
S240429an Terrestrial (98%), BNS (2%) Yes 1398403401.63April 29, 2024
05:23:03 UTC
GCN Circular Query
Notices | VOE
0.000000002867864000001 per 11.049 years RETRACTED 1398403401.63 Ω H1
Ω L1
Ω V1