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GCN Circular 34595

Subject
LIGO/Virgo/KAGRA S230814ah: Updated Sky localization
Date
2023-08-29T21:57:07Z (9 months ago)
From
Charlie Hoy at University of Portsmouth <charlie.hoy@port.ac.uk>
Via
Web form
The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report:

We have conducted further analysis of the LIGO Livingston Observatory (L1) data around the time of the compact binary merger (CBC) candidate S230814ah (GCN Circular 34429). 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/S230814ah

For the Bilby.offline0.multiorder.fits sky map, the 90% credible region is 25260 deg2. Marginalized over the whole sky, the a
posteriori luminosity distance estimate is 330 +/- 105 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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