TITLE: GCN CIRCULAR NUMBER: 22122 SUBJECT: LIGO/Virgo G288732/GW170608: updated localization from parameter estimation DATE: 17/11/14 21:10:47 GMT FROM: Leo Singer at NASA/GSFC The LIGO Scientific Collaboration and the Virgo Collaboration report: We have re-analysed offline noise-subtracted data for the LIGO Hanford Observatory (H) and the LIGO Livingston Observatory (L) around the time of the binary black hole merger event G288732 / GW170608 (GCNs 21221 and 21239) taking into account our most up-to-date understanding of both calibration and waveform modelling uncertainties. Parameter estimation has been performed using LALInference (Veitch et al., PRD 91, 042003) and a new sky map, LALInference-P.fits.gz, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/events/G288732 The 50% and 90% credible regions span about 170 and 520 square degrees, respectively. This is the preferred sky map at this time, and the version that will appear in LVC 2017 ("GW170608: Observation of a 19-solar-mass binary black hole coalescence", in preparation).