TITLE: GCN CIRCULAR NUMBER: 38410 SUBJECT: LIGO/Virgo/KAGRA S241201ac: Updated Sky localization DATE: 24/12/01 21:50:44 GMT FROM: ethan.payne@ligo.org
The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:
We have conducted further offline analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S241201ac (GCN Circular 38402). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page:
https://gracedb.ligo.org/superevents/S241201ac
For the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 2300 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 7122 +/- 2366 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/.
[1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040
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