TITLE: GCN CIRCULAR NUMBER: 27044 SUBJECT: LIGO/Virgo S200213t: NED Galaxies in the 90% Localization Volume DATE: 20/02/13 05:17:11 GMT FROM: David Cook at IPAC/Caltech David O. Cook (Caltech/IPAC), Angela Van Sistine (UW Milwaukee), Leo Singer (NASA/GSFC), Igor Andreoni (Caltech), Michael Coughlin (Caltech), Bob Aloisi (UW Milwaukee), Patrick R. Brady (UW Milwaukee), Rick Ebert (Caltech/IPAC), George Helou (Caltech/IPAC), David Kaplan (UW Milwaukee), Mansi M. Kasliwal (Caltech), Joseph M. Mazzarella (Caltech/IPAC), and Marion Schmitz (Caltech/IPAC) On behalf of the Global Relay of Observatories Watching Transients Happen (GROWTH) collaboration and the NASA/IPAC Extragalactic Database (NED) Team. We spatially cross-matched the LIGO/Virgo S200213t trigger sky localization with the galaxies in NED and found 22,738 galaxies within the 90% containment volume. We list here the top 20 galaxies sorted by 2MASS absolute K-band magnitude. For an extended list of galaxies in the 90% volume go to the NED Gravitational Wave Followup service at https://ned.ipac.caltech.edu/uri/NED::GWF/. This service provides downloadable galaxy lists and visualizations for candidate host galaxies. For each GW alert, these products are automatically generated and made available within minutes to expedite efficient electromagnetic followup observations. objname ra dec DistMpc k_m_k20fe M_Ks dP_dV ---------------------------- -------- -------- ------- --------- ---------- -------- ESO 101- G 004 249.5755 -64.3602 205.84 9.401 -27.166622 4.34e-09 ESO 443- G 007 193.6709 -29.2276 238.81 9.885 -27.005278 5.61e-09 ESO 443- G 011 193.9000 -30.3476 224.48 9.827 -26.928883 9.17e-09 UGC 01651 32.4105 35.7975 157.10 9.157 -26.823874 1.99e-07 2MASX J00411536+4756049 10.3141 47.9347 359.86 10.963 -26.817642 1.71e-08 MCG +03-06-037 32.3684 19.7767 273.56 10.407 -26.778292 2.84e-08 2MASX J00482152+4646379 12.0896 46.7772 377.59 11.148 -26.737125 6.43e-09 WKK 6876 246.8634 -58.9250 199.48 9.83 -26.669447 4.94e-09 2MASX J02392281+4034032 39.8450 40.5677 330.30 10.954 -26.640547 1.14e-08 ESO 217- G 017 179.5857 -50.9771 58.74 7.216 -26.628517 1.10e-08 2MASX J01570500+4120301 29.2708 41.3418 337.27 11.016 -26.62392 1.92e-08 VII Zw 030 78.0703 65.1993 275.85 10.608 -26.595392 3.44e-09 ESO 443- G 004 193.5927 -29.0130 225.27 10.172 -26.591522 6.81e-09 UGC 01518 30.5786 19.0671 269.19 10.575 -26.575272 2.73e-08 2MASX J01552713+4130237 28.8631 41.5066 324.33 10.985 -26.569904 2.41e-08 2MASX J01340411+2752214 23.5169 27.8725 294.07 10.779 -26.56329 7.84e-09 2MASX J02015728+4615037 30.4888 46.2510 334.80 11.063 -26.56091 3.08e-08 ESO 443- G 014 194.2425 -31.3296 235.13 10.297 -26.559544 7.82e-09 UGC 01841 NOTES01 35.8040 42.9878 146.00 9.263 -26.558765 6.95e-08 IC 4252 201.8667 -27.3248 189.06 9.874 -26.509014 9.26e-09 Table: Top 20 galaxies in NED that fall in the 90% probability volume for S200213t sorted by 2MASS absolute K-band magnitude. Column descriptions are as follows. name: galaxy name. ra: RA (J2000, decimal degrees). dec: Dec (J2000, decimal degrees). distmpc: galaxy distance (Mpc). k_m_k20fe: the 2MASS apparent magnitude. M_Ks: the absolute K-band magnitude derived using the 'DistMpc' column. dP_dV: the 3D probability density per cubic megaparsec at the position of each galaxy.