TITLE:   GCN CIRCULAR
NUMBER:  25782
SUBJECT: LIGO/Virgo S190828l: Updated Sky Localization
DATE:    19/09/19 14:56:25 GMT
FROM:    Olivier Minazzoli at LIGO Virgo Collaboration  <olivier.minazzoli@ligo.org>

The LIGO Scientific Collaboration and the Virgo Collaboration report:

We have conducted further analysis of the data from LIGO Hanford
Observatory (H1), LIGO Livingston Observatory (L1) and Virgo
Observatory (V1) around the time of the compact binary merger (CBC)
candidate S190828l (GCN Circular 25503). Parameter estimation has
been performed using LALInference [1] and a new sky map,
LALInference.v2.fits.gz, distributed via GCN Notice, is available for
retrieval from the GraceDB event page:
 https://gracedb.ligo.org/superevents/S190828l

The preferred sky map at this time is LALInference.v2.fits.gz. The 90%
credible region is 359 deg2. Marginalized over the whole sky, the a
posteriori luminosity distance estimate is 1528 +/- 387 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
 <https://emfollow.docs.ligo.org/userguide/>.

 [1] Veitch et al. PRD 91, 042003 (2015)