GCN Circular 26476
Subject
LIGO/Virgo S191216ap: galaxies consistent with GW + Neutrino + HAWC position
Date
2019-12-17T16:19:32Z (4 years ago)
From
Varun Bhalerao at Indian Inst of Tech <varunb@iitb.ac.in>
H. Kumar (IITB), A. Sagu��s Carracedo (OKC, Stockholm University), T. Ahumada (UMD), I. Andreoni (Caltech), V. Bhalerao (IITB) report on behalf of the GROWTH collaboration:
We cross-matched the HAWC trigger position (HAWC Collaboration, GCN 26472) with the GLADE catalog (Dalya et al., 2018), to identify sources within 0.9 degrees (approximately 3-sigma) of the HAWC position RA, Dec = 323.53, 5.23. We further applied a distance constraint based on the 3D Bayestar localisation provided by the LVC (bayestar.fits.gz,1), using mean distance = 95.6 Mpc and distance sigma = 37.4 Mpc, appropriate for this direction. We find four objects in GLADE 1 (http://vizier.u-strasbg.fr/viz-bin/VizieR-3?-source=VII/275/glade1) that are consistent with the position and distance at 3-sigma:
ra dec sep dist sigma
323.124298 5.346313 0.42 85.3405 1.43
323.741486 5.792747 0.601 150.166 2.48
323.621368 6.034144 0.809 85.5611 2.71
323.298126 4.682521 0.594 173.891 2.88
(sep = separation in degrees).
If we use the newer Glade 2.3 catalog (https://vizier.u-strasbg.fr/viz-bin/VizieR?-source=VII/281), we find only the first two objects as consistent within 3-sigma.
Further observations of these galaxies are under way.