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GCN Circular 35509

Subject

LIGO/Virgo/KAGRA S240109a: Updated Sky localization

Date

2024-01-09T15:18:48Z (4 months ago)

From

Colm Talbot at University of Chicago <talbotcolm@gmail.com>

Via

Web form

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 S240109a (GCN Circular 35502Not found
 
 
). 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/S240109a

For the Bilby.multiorder.fits,0 sky map, the 90% credible region is 28048 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1594 +/- 567 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) and Morisaki et al. arXiv:2307.13380Not found
 
 
 (2023)