TITLE: GCN CIRCULAR NUMBER: 26222 SUBJECT: LIGO/Virgo S191110af: Identification of a GW unmodeled transient candidate DATE: 19/11/11 00:15:09 GMT FROM: Deep Chatterjee at University of Wisconsin, Milwaukee The LIGO Scientific Collaboration and the Virgo Collaboration report: We identified the unmodeled transient candidate S191110af during real- time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2019-11-10 23:06:44.183 UTC (GPS time: 1257462422.183). The candidate was found by the CWB [1] analysis pipeline. S191110af is an event of interest because its false alarm rate, as estimated by the online analysis, is 2.5e-09 Hz, or about one in 12 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S191110af One sky map is available at this time and can be retrieved from the GraceDB event page: * cWB.fits.gz,1 an initial localization generated by CWB [1], distributed via GCN notice about 10 minutes after the candidate event time. For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo Public Alerts User Guide . [1] Klimenko et al. PRD 93, 042004 (2016)