TITLE: GCN CIRCULAR NUMBER: 21485 SUBJECT: LIGO/Virgo G297595: Nearby Galaxies in the Localization Volume DATE: 17/08/14 22:51:54 GMT FROM: Mansi M. Kasliwal at Caltech David O. Cook (Caltech), Angela Van Sistine (UW Milwaukee), Leo Singer (NASA/GSFC), and M. M. Kasliwal (Caltech) report on behalf of the iPTF and GROWTH collaborations We spatially cross-matched the LIGO/Virgo G297595 trigger (90% containment volume; LVC GCN 21476) with our Census of the Local Universe (CLU; Cook et al. in prep) galaxy catalog and found 82 galaxies. This catalog is a compilation of galaxies with existing redshifts from many sources (e.g., NED, SDSS, etc) and new galaxies from a 3PI four-filter narrow-band survey to look for redshifted Halpha emission out to 200 Mpc with the Palomar Oschin 48-inch telescope. Since our catalog extends out to only ~200 Mpc the resulting cross-matched galaxies cover only the nearest portion of the full 90% localization volume. The narrow-band survey is limited to a declination above -20 degrees, thus all galaxies within the 90% volume come from the compiled CLU catalog with no Halpha overlap. We list here the top 20 galaxies sorted by stellar mass (Mstar) for galaxies whose location on the sky and distance falls in the 90% volume reported by the bayestar probability sky map (Singer et al. 2016). The total stellar mass located in the top 20 galaxies is 1.2e12 Msun, or 62% of all mass in the 82 galaxies. We also list the dust-corrected star formation rates (SFRs) for galaxies with GALEX FUV detections and a 'nan' for those with no detection. name_NED ra dec distmpc logsfr_fuv logmstar dm_kin ----------------------- ------- -------- ------- ---------- -------- ------ ESO 198- G 008 35.5645 -51.1082 203.28 nan 11.22 36.54 2MASX J02235787-5058237 35.9912 -50.9733 203.55 nan 10.88 36.54 2MFGC 01839 35.6649 -51.1009 210.38 nan 10.88 36.62 FAIRALL 0726 36.8979 -51.2267 213.23 nan 10.87 36.64 LCRS B025452.9-421921 44.1862 -42.1218 192.15 nan 10.87 36.42 FAIRALL 0725 35.3950 -48.4925 271.12 0.138 10.84 37.17 ESO 198- G 006 34.8638 -50.8529 209.43 nan 10.80 36.61 2MASX J02160149-5059094 34.0063 -50.9860 204.21 nan 10.78 36.55 LCRS B025721.0-412315 44.8065 -41.1892 204.46 nan 10.78 36.55 2MASX J02270511-5117448 36.7714 -51.2958 202.12 -0.596 10.76 36.53 2MASX J03045777-4015102 46.2408 -40.2528 208.70 -0.638 10.69 36.60 2MASX J02411987-4534101 40.3329 -45.5695 180.75 0.144 10.65 36.29 AM 0250-405 NED01 42.9935 -40.7236 199.58 nan 10.65 36.50 APMBGC 247-025-101 43.1562 -43.0039 198.57 nan 10.64 36.49 2MASX J02504210-4323076 42.6755 -43.3855 198.81 nan 10.63 36.49 2MASX J02523735-4300107 43.1556 -43.0029 194.98 nan 10.62 36.45 LCRS B025513.6-421400 44.2721 -42.0336 189.87 nan 10.59 36.39 2MASX J02251101-5039230 36.2958 -50.6564 208.82 nan 10.57 36.60 2MASX J02274395-5119348 36.9333 -51.3263 201.72 nan 10.54 36.52 2MASX J02143393-4953404 33.6416 -49.8946 200.55 nan 10.52 36.51 The SFRs are derived from GALEX all sky kron FUV magnitudes via the prescription of Murphy et al. (2011) and have been corrected for internal dust extinction using a combination of GALEX FUV and 22um ALLWISE fluxes (Hao et al. 2011). The quoted stellar masses are derived from 3.4um ALLWISE fluxes and a mass-to-light ratio of 0.5 (McGaugh & Schombert et al. 2015).