TITLE: GCN CIRCULAR NUMBER: 36684 SUBJECT: LIGO/Virgo/KAGRA S240615ea: Updated Sky localization DATE: 24/06/17 14:41:48 GMT FROM: Charlie Hoy at University of Portsmouth charlie.hoy@port.ac.uk
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 S240615ea (GCN Circular 36670). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits, distributed via GCN Notice, is available for retrieval from the GraceDB event page:
https://gracedb.ligo.org/superevents/S240615ea
For the Bilby.offline0.multiorder.fits sky map, the 90% credible region is 653 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 3590 +/- 1058 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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