TITLE:   GCN CIRCULAR
NUMBER:  34674
SUBJECT: LIGO/Virgo/KAGRA S230911ae: Updated Sky localization
DATE:    23/09/12 01:48:17 GMT
FROM:    Aaron Zimmerman at U. of Texas at Austin <aaron.zimmerman@utexas.edu>

The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:

We have conducted further analysis of the LIGO Hanford Observatory (H1) data around the time of the compact binary merger (CBC) candidate S230911ae (GCN Circular 34666). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:

https://gracedb.ligo.org/superevents/S230911ae

For the Bilby.multiorder.fits,0 sky map, the 90% credible region is 27759 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1623 +/- 584 Mpc (a posteriori mean +/- standard deviation).

For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/userguide/.


 [1] Ashton et al. ApJS 241, 27 (2019)