TITLE: GCN CIRCULAR NUMBER: 24464 SUBJECT: LIGO/Virgo S190510g: J-GEM optical/NIR follow-up observations DATE: 19/05/10 22:34:06 GMT FROM: Koji S. Kawabata at JGEM Kawabata, K. S., Sasada, M., Nakaoka, T., Akitaya, H., Imazato, F., Nishinaka, Y. (Hiroshima U.), Yanagisawa, K., Yoshida, M. (NAOJ), Morokuma, T. (U. of Tokyo), Tominaga N. (Konan U.), Utsumi, Y. (Stanford/SLAC), Yatsu, Y., Murata, K. L. (Tokyo Tech.), Kamei, Y. (Nagoya U.), Tristram, P. (Mt. John U. Observatory), Suematsu, H., Yamawaki, T. (Osaka U.), Matsubayashi, K. (Kyoto U.), Saito, T., Onozato, H. (Nishi-Harima Astronomical Observatory), Itoh, R. (Bisei Astronomical Observatory), Sekiguchi, Y. (Toho U.), Oasa, Y., Takarada, T., Kanai, K., Takeuchi, H., Shigeyoshi, T. (Saitama U.) on behalf of J-GEM collaboration We report our optical and near-infrared imaging observations for the gravitational wave event S190510g. We started our observations about 7.5 hours after the alert. We performed galaxy-targeted observations for 28 galaxies (see the table below) selected from the GLADE catalog (Dalya et al. 2016) in the probability skymap of S190510g using the following telescopes and instruments. - 50 cm MITSuME telescope at Akeno Observatory and a 3 color imager (g, Rc, Ic) - 50 cm MITSuME telescope at Okayama Astrophysical Observatory and a 3 color imager (g, Rc, Ic) - 55 cm SaCRA telescope at Saitama University and MuSaSHI (r, i, z) - 61 cm Boller & Chivens telescope at Mt. John Observatory in New Zealand (B&C) and a three color imager Tripole5 (g, r, i) - 91 cm Okayama Astrophysical Observatory NIR Wide‐Field Camera, OAOWFC (J) (Yanagisawa, K., et al. 2016, Proc. SPIE, 9908, 99085D) - 150 cm Kanata telescope at Higashi-Hiroshima Observatory and HONIR -- a 2 channel imager (Rc and H or J) (Akitaya et al. 2014, 9147, 91474O) - 200 cm Nayuta telescope at Nishi-Harima Astronomical Observatory and Nishiharima Infrared Camera, NIC (J, H, Ks) - 380 cm Seimei telescope at Okayama Observatory and optical-fiber integral field spectrograph, KOOLS-IFU We found no apparent transient object in these galaxies to 5 sigma limiting magnitudes listed below, except for a few marginal cases that are being carefully investigated by spectroscopy. We will post it if it is likely an actual transient. galid ra dec G g r R i I z J H K obsid GL055116-310617 87.8176 -31.1046 -- 19.51 20.06 -- 19.47 -- -- -- -- -- BandC-Tripol GL055150-314446 87.958 -31.7461 -- 19.82 19.81 -- 19.32 -- -- -- -- -- BandC-Tripol GL054828-325838 87.115 -32.9772 -- 18.61 19.01 -- 18.31 -- -- -- -- -- BandC-Tripol GL055050-314427 87.7077 -31.7407 -- 17.25 17.05 -- 16.56 -- -- -- -- -- BandC-Tripol GL055504-313735 88.7683 -31.6263 -- 16.75 16.91 -- 16.25 -- -- -- -- -- BandC-Tripol GL055140-313123 87.9168 -31.5231 -- 18.70 18.97 -- 18.29 -- -- -- -- -- BandC-Tripol GL055352-324437 88.4666 -32.7436 -- 17.75 -- -- 17.18 -- -- -- -- -- BandC-Tripol GL054902-312929 87.2593 -31.4913 -- 14.98 14.89 -- 17.76 -- -- -- -- -- BandC-Tripol GL055123-310146 87.8458 -31.0294 -- 17.40 17.77 -- 17.25 -- -- -- -- -- BandC-Tripol GL055552-320353 88.9671 -32.0647 -- 13.71 13.00 -- 13.38 -- -- -- -- -- BandC-Tripol GL055050-314426 87.7074 -31.7404 -- 17.25 17.05 -- 16.56 -- -- -- -- -- BandC-Tripol GL055349-324625 88.4551 -32.7736 -- 17.75 -- -- 17.18 -- -- -- -- -- BandC-Tripol GL055054-314721 87.726 -31.7891 -- 17.25 17.05 -- 16.56 -- -- -- -- -- BandC-Tripol GL055137-313213 87.9051 -31.537 -- 18.70 18.97 -- 18.29 -- -- -- -- -- BandC-Tripol GL054835-330005 87.147 -33.0013 -- 18.61 19.01 -- 18.31 -- -- -- -- -- BandC-Tripol GL145211+044054 223.0459 4.6818 -- -- -- 21.88 -- -- -- 16.08 19.77 -- OAOWFC,Kanata-HONIR GL055045-314528 87.6857 -31.7579 -- 17.25 17.05 -- 16.56 -- -- -- -- -- BandC-Tripol GL134200+003605 205.4958 0.6015 -- -- 17.40 18.07 18.78 -- 18.78 16.89 15.72 -- OAOWFC,Kanata-HONIR,SaCRA-MuSaSHI GL142718+044810 216.8261 4.8029 18.74 -- -- 21.84 -- 18.04 -- 18.49 19.94 -- OAOWFC,Kanata-HONIR,MITSuME-Akeno GL133953+005024 204.97 0.8399 -- -- 16.64 20.94 18.37 -- 16.64 18.98 18.56 -- Kanata-HONIR,SaCRA-MuSaSHI GL144043+032756 220.1787 3.4654 18.18 -- -- 21.41 -- 17.63 -- 19.01 19.44 99.99 MITSuME-Akeno,Kanata-HONIR,OAOWFC,Nayuta GL134511+000710 206.2954 0.1194 -- -- -- 20.62 -- -- -- 17.57 19.18 -- Kanata-HONIR,OAOWFC GL133648+010914 204.1999 1.1538 -- -- -- 20.34 -- -- -- -- 18.84 -- Kanata-HONIR GL145412+044501 223.5521 4.7502 19.10 -- -- 19.08 -- 18.36 -- -- -- -- MITSuME-Akeno GL133644-032952 204.1844 -3.4978 17.95 -- -- 18.36 -- 17.94 -- -- -- -- MITSuME-Akeno GL133614-010217 204.0588 -1.0381 16.19 -- -- 19.15 -- 16.83 -- -- 17.82 -- MITSuME-Akeno,Kanata-HONIR GL134042-044642 205.175 -4.7784 13.92 -- 15.82 13.34 18.78 13.41 18.78 -- -- -- MITSuME-Okayama,SaCRA-MuSaSHI GL133715-045629 204.3112 -4.9413 14.85 -- -- 20.78 -- 14.39 -- -- 19.27 -- MITSuME-Akeno,Kanata-HONIR