TITLE: GCN CIRCULAR NUMBER: 36620 SUBJECT: LIGO/Virgo/KAGRA S240601co: Updated Sky localization DATE: 24/06/05 15:09:19 GMT FROM: Aditya Vijaykumar aditya.vijaykumar@ligo.org
The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:
We have conducted further 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 S240601co (GCN Circular 36594). 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/S240601co
For the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 1110 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1421 +/- 390 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. (2023) arXiv:2307.13380
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