TITLE: GCN CIRCULAR NUMBER: 20520 SUBJECT: LIGO/Virgo G270580: No change to estimate of LIGO false alarm probability DATE: 17/01/25 03:02:04 GMT FROM: Peter Shawhan at U of Maryland/LSC The LIGO Scientific Collaboration and Virgo report: The Coherent WaveBurst event candidate of 2017-01-20, with GraceDB ID G270580, was initially reported (LSC and Virgo, GCN 20486) with an estimated false alarm rate (FAR) of 1.6e-7 Hz, or about 5 per year. Offline re-analysis has not changed this estimate. At this time, we do not have any evidence suggesting that the significance of this event will increase on further study.