{ "bibcode": "2019GCN.24192....1S", "body": "Sasada, M., Akitaya, H., Nakaoka, T. (Hiroshima U.), Yoshida, M. (NAOJ/Subaru),\nTanaka, M. (Tohoku U.), Tominaga N., Ohgami, T., Kaneko A. (Konan U.),\nItoh, R. (Bisei Astronomical Observatory), Sekiguchi, Y. (Toho U.),\nUtsumi, Y. (Stanford U./SLAC), Morokuma, T., Niino, Y., Ohsawa, R. (U.\nof Tokyo),\nMurata, K. L. (Tokyo Tech), on behalf of J-GEM collaboration\n\n\nWe report our optical imaging observations of galaxies in the\nlocalization region of the BNS gravitational wave event S190425z (The\nLIGO Scientific Collaboration and the Virgo Collaboration, 2019, GCN,\n24168) using the Faint Object Camera and Spectrograph (FOCAS; 6 arcmin\nfield-of-view in diameter; Kashikawa et al. 2002, PASJ, 54, 819) on\nthe 8.2-m Subaru telescope. We started our observations at UT\n2019-04-25 11:46, about 3.5 hours after the event.\n\nWe observed 154 galaxies in total. The target galaxies are selected\nfrom the list of potential host galaxies for this event (Dalya et al.\n2019, GCN, 24171) around the central coordinate of the localization of\nthe gamma-ray pulses detected with INTEGRAL/SPI-ACS (Minaev et al.\n2019, GCN, 24170). The list of the galaxies we observed is shown in\nthe table below.\n\nWe took ten-second r-band images for each galaxy with typical 5-sigma\ndepths of 23-24 mag. The obtained images are compared with the\nPan-STARRS r-band images (Chambers et al., 2016, arXiv:1612.05560)\nwith similar or slightly shallower depths compared to our FOCAS\nimages. In these galaxies, we find no apparent transient objects that\nare not registered in the IAU Transient Name Server\n(https://wis-tns.weizmann.ac.il).\n\nGalaxy name RA Dec\n2MASS16522624+2319575 16:52:26.24 +23:19:57.5\nNGC6051 16:04:56.70 +23:55:58.3\nNGC6062 16:06:22.80 +19:46:40.6\n60191 17:23:26.11 +23:38:39.5\nNGC6308 17:11:59.72 +23:22:48.3\n57296 16:09:15.67 +25:42:45.0\n56144 15:49:57.32 +20:48:18.6\nUGC10138 16:01:40.23 +21:21:10.6\nUGC10153 16:03:19.52 +20:38:12.5\n57607 16:14:57.83 +21:56:17.9\n58028 16:24:15.15 +20:11:00.9\n56443 15:56:33.64 +20:03:08.2\n56713 16:01:28.67 +22:25:39.6\nNGC6203 16:40:27.38 +23:46:29.1\n57072 16:05:29.16 +19:56:31.7\n2MASS16313806+2047366 16:31:38.06 +20:47:36.6\n58396 16:30:47.15 +20:21:19.3\nNGC6233 16:50:15.72 +23:34:47.4\n1683153 16:32:58.94 +23:11:51.0\n1745822 16:09:51.84 +25:41:11.6\n59087 16:50:14.26 +23:26:28.4\n58322 16:29:17.35 +20:21:53.3\n58537 16:34:53.70 +23:12:42.2\nUGC10224 16:08:50.23 +22:02:33.4\n2MASS18405128+2334077 18:40:51.28 +23:34:07.7\n58006 16:23:40.08 +24:28:26.6\n1695642 16:22:57.30 +23:53:35.9\n1631905 16:16:11.90 +20:36:45.1\nUGC10834 17:24:32.84 +20:23:53.0\n1612380 16:00:30.52 +19:59:07.0\n55776 15:40:37.22 +20:33:44.7\n56150 15:49:59.28 +20:48:20.6\nUGC10260 16:11:57.87 +20:55:24.4\nNGC6075 16:11:22.56 +23:57:54.5\n57272 16:08:33.84 +21:04:52.3\n1635109 15:44:24.00 +20:45:09.5\n214459 16:06:00.72 +20:50:50.2\n2MASS16060593+2047032 16:06:05.93 +20:47:03.2\n2MASS16072060+2058306 16:07:20.60 +20:58:30.6\n3089913 16:06:16.28 +21:03:49.2\nPGC1626696 12:03:48.25 +20:24:58.9\n56856 16:03:17.78 +21:35:30.5\n56706 16:01:25.27 +21:55:57.5\n1661347 16:04:50.77 +21:59:23.3\n214390 15:35:04.81 +23:28:45.7\n56084 15:48:33.88 +22:58:20.8\n57085 16:05:36.81 +22:11:10.8\n56652 16:00:38.21 +22:32:37.0\n57526 16:13:25.54 +21:54:33.8\nSDSSJ153858.32+234650.8 15:38:58.33 +23:46:50.8\n2MASS16073961+2220315 16:07:39.61 +22:20:31.5\n1671243 16:05:23.40 +22:30:27.6\nIC4573 15:42:12.27 +23:48:00.5\n57116 16:05:58.62 +22:37:55.9\n57420 16:11:20.97 +22:22:31.3\n56853 16:03:13.71 +23:00:29.5\nUGC10236 16:10:05.09 +22:39:01.1\n56252 15:52:02.13 +23:44:02.7\nUGC10066 15:51:36.87 +23:47:24.1\n1688132 16:03:44.45 +23:28:55.4\n57542 16:13:46.01 +22:55:07.9\n57472 16:12:20.33 +23:00:07.0\n56175 15:50:38.65 +20:22:54.7\n1623900 16:04:43.49 +20:19:25.3\n56534 15:58:33.94 +20:11:06.3\nUGC10060 15:51:06.90 +20:12:09.2\n3089914 16:18:24.75 +20:53:23.9\n1686786 15:10:28.49 +23:24:14.4\nPGC1689724 15:11:16.57 +23:34:20.9\n2MASS16182990+2209489 16:18:29.90 +22:09:48.9\n1684230 15:50:20.24 +23:15:32.7\n1690340 15:43:51.42 +23:36:26.5\n1668320 16:19:07.19 +22:21:07.7\n55690 15:38:59.04 +23:46:54.0\n1672257 16:17:11.69 +22:33:46.9\n57493 16:12:42.77 +22:59:02.7\n2MASS16141210+2307136 16:14:12.10 +23:07:13.6\n57263 16:08:23.52 +23:28:24.7\n57265 16:08:22.57 +23:28:46.7\n56963 16:04:36.61 +23:39:47.3\n1691288 16:04:59.95 +23:39:30.4\n57021 16:05:02.50 +23:40:08.5\n56958 16:04:33.46 +23:50:16.3\n57003 16:04:50.57 +23:58:30.3\n57014 16:04:59.47 +23:58:12.3\n56887 16:03:41.89 +24:05:42.5\n1692398 16:12:07.70 +23:43:04.9\nUGC10256 16:11:30.77 +23:48:42.3\n56991 16:04:46.81 +24:16:43.2\n1694999 16:12:14.17 +23:51:28.9\n57105 16:05:49.61 +24:10:32.8\n1705857 16:03:14.25 +24:22:23.2\n57406 16:11:14.38 +24:13:29.5\n1717114 16:04:16.27 +24:48:44.4\nUGC10160 16:03:54.24 +25:00:38.0\n57029 16:05:11.46 +24:57:36.7\n56949 16:04:35.57 +25:11:23.3\n57293 16:09:06.46 +24:52:13.0\n1686035 16:36:40.62 +23:21:36.5\n58712 16:39:41.29 +23:30:53.4\n58345 16:29:44.04 +23:21:10.6\nUGC10320 16:18:07.32 +21:03:58.9\n58744 16:40:50.93 +23:39:34.0\n58371 16:30:13.32 +23:04:11.1\n58050 16:24:45.01 +23:57:54.3\n58363 16:30:02.71 +23:21:16.1\n56249 15:52:05.66 +20:08:42.7\n58360 16:29:53.36 +20:13:57.6\n60508 17:34:06.29 +23:31:09.2\n1642211 16:21:09.60 +21:04:30.3\n56874 16:03:28.01 +20:17:32.3\nPGC058850 16:43:36.19 +20:13:53.8\n1621936 16:47:43.70 +20:15:48.6\n56961 16:04:35.71 +25:43:14.3\n57893 16:21:04.24 +21:20:26.3\nNGC6201 16:40:14.41 +23:45:55.0\n58042 16:24:34.15 +21:11:41.3\n2MASS15503893+2023227 15:50:38.93 +20:23:22.7\n1736488 16:10:48.42 +25:26:12.6\n60430 17:31:15.29 +23:35:01.8\n1614726 15:57:32.18 +20:03:12.8\n57765 16:18:05.32 +21:33:12.9\nNGC6062B 16:06:18.93 +19:45:47.2\n58415 16:31:06.58 +23:49:57.7\n1673429 16:20:44.20 +22:38:00.7\n2MASS16345531+2034432 16:34:55.31 +20:34:43.2\n2MASS16320391+2045519 16:32:03.91 +20:45:51.9\n57752 16:17:49.42 +20:41:28.9\n1638586 16:27:04.49 +20:54:35.2\n1685163 16:33:32.29 +23:18:43.4\n57391 16:10:52.39 +22:37:32.2\n1603948 16:13:55.38 +19:44:45.9\n56282 15:52:43.13 +20:13:59.8\n1692904 16:52:11.03 +23:44:39.6\nUGC10525 16:44:04.21 +23:23:52.1\n60413 17:30:34.99 +23:37:28.9\n57290 16:09:07.26 +21:52:03.7\n59153 16:52:17.31 +23:18:01.5\n2MASS16302400+2026011 16:30:24.00 +20:26:01.1\n1667049 16:02:25.59 +22:17:02.5\n59213 16:53:53.83 +20:35:51.8\n1628794 16:25:52.24 +20:29:19.8\n57283 16:08:58.14 +19:49:25.5\n1657664 16:19:02.35 +21:48:22.7\n1632425 16:25:00.27 +20:38:04.5\n1612760 15:57:33.04 +19:59:43.8\n1688390 16:29:48.38 +23:29:45.6\n1664646 16:05:13.92 +22:09:32.6\n1610658 16:05:32.29 +19:56:04.8\n1727092 16:11:38.16 +25:09:11.6\n1736885 16:03:52.36 +25:26:48.6\n2MASS16282647+2341107 16:28:26.47 +23:41:10.7\n3089915 16:20:34.24 +21:12:08.7\n1699245 16:11:35.70 +24:04:35.6", "circularId": 24192, "createdOn": 1556214985000, "email": "sasadam@hiroshima-u.ac.jp", "subject": "LIGO/Virgo S190425z: J-GEM optical follow-up observations with Subaru/FOCAS", "submitter": "Mahito Sasada at Hiroshima University ", "eventId": "LIGO/Virgo S190425z" }