[vsnet-grb-info 23683] LIGO/Virgo S190828l: Updated Sky Localization

[GCN Circulars]

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 at 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)