TITLE: GCN CIRCULAR NUMBER: 24640 SUBJECT: LIGO/Virgo S190521g: Updated sky localization DATE: 19/05/21 14:22:52 GMT FROM: Geoffrey Mo at LIGO The LIGO Scientific Collaboration and the Virgo Collaboration report: We have conducted further analysis of the LIGO and Virgo data around the time of the compact binary coalescence (CBC) candidate S190521g (GCN 24621). Parameter estimation has been performed using LALInference [1] and a new sky map, LALInference.fits.gz, distributed via GCN Notice, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S190521g LALInference.fits.gz is the preferred sky map at this time. The 90% credible region is 765 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3931 +/- 953 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo Public Alerts User Guide . [1] Veitch et al. PRD 91, 042003 (2015)