TITLE: GCN CIRCULAR NUMBER: 26734 SUBJECT: LIGO/Virgo S200114f: Identification of a GW unmodeled transient candidate DATE: 20/01/14 03:24:22 GMT FROM: Deep Chatterjee at University of Wisconsin, Milwaukee The LIGO Scientific Collaboration and the Virgo Collaboration report: We identified the unmodeled transient candidate S200114f during real- time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2020-01-14 02:08:18.239 UTC (GPS time: 1263002916.239). The candidate was found by the CWB [1] analysis pipeline with a version of the search called “IMBH”. This name is not a classification of the candidate. S200114f is an event of interest because its false alarm rate, as estimated by the online analysis, is 1.2e-09 Hz, or about one in 25 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S200114f Two sky maps are available at this time and can be retrieved from the GraceDB event page: * cWB.fits.gz,1, an initial localization generated by cWB, distributed via GCN notice about 5 minutes after the candidate event time. * cWB.fits.gz,3 -- this is identical to cWB.fits.gz,1 The preferred sky map at this time is cWB.fits.gz,3. For the cWB.fits.gz,3 sky map, the 90% credible region is 403 deg2. 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)