GCN Circular 25333

The LIGO Scientific Collaboration and Virgo Collaboration report:

We have conducted further analysis of the LIGO and Virgo data around
the time of the compact binary coalescence (CBC) candidate S190814bv
(GCN 25324
Not found
 
 
). Parameter estimation has been performed using
LALInference [1] and a new sky map, LALInference.v1.fits.gz,
distributed via GCN Notice, is available for retrieval from the
GraceDB event page:

https://gracedb.ligo.org/superevents/S190814bv/

LALInference.v1.fits.gz is the preferred sky map at this time.
The 90% credible region is 23 deg2. Marginalized over the whole sky,
the a posteriori luminosity distance estimate is 267 +/- 52 Mpc
(a posteriori mean +/- standard deviation).

Based on posterior support from parameter estimation [1, 2], under the
assumption that the candidate S190814bv is astrophysical in origin,
there is strong evidence that the lighter compact object has a
mass < 3 solar masses (HasNS > 99%) and a
negligible probability of having disrupted material outside the final
compact object (HasRemnant < 1%). The parameter estimation based
classification of the GW signal, in order of descending probability,
is NSBH (>99%), MassGap (<1%), BBH (<1%), or BNS (<1%).

The above mentioned probabilities are the preferred classification
results that supersede the ones stated in GCN 25324
Not found
 
 
. The probability
of non-astrophysical origin and the false alarm rate are not being
updated at this time.

For further information about analysis methodology and the contents
of this alert, refer to the LIGO/Virgo Public Alerts User Guide
<https://emfollow.docs.ligo.org/userguide/>.

[1] Veitch, et al. PRD 91, 042003 (2015)
[2] Abbott, et al. PRL 116, 241102 (2016)