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GCN Circular 34695

Subject
LIGO/Virgo/KAGRA S230914ak: Updated Sky localization
Date
2023-09-14T15:28:07Z (8 months ago)
From
Aaron Zimmerman at U. of Texas at Austin <aaron.zimmerman@utexas.edu>
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) and LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230914ak (GCN Circular 34692). 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/S230914ak

For the Bilby.multiorder.fits,0 sky map, the 90% credible region is 1532 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2676 +/- 827 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)

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