TITLE: GCN CIRCULAR NUMBER: 18840 SUBJECT: LIGO/Virgo G211117: Subaru Hyper Suprime-Cam follow-up observation DATE: 16/01/08 04:32:18 GMT FROM: Michitoshi Yoshida at J-GEM Michitoshi Yoshida, Yousuke Utsumi (Hiroshima Univ.), Tomoki Morokuma, Kentaro Motohara (Univ. of Tokyo), Masaomi Tanaka, Fumiaki Nakata, Tsuyoshi Terai, Francois Finet (NAOJ), Nozomu Tominaga (Konan Univ.) on behalf of J-GEM collaboration We report optical imaging follow-up observations for a part of the northern skymap regions of G211117 with Hyper Suprime-Cam (HSC) attached to 8.2-m Subaru Telescope. HSC has a circular field-of-view whose area is 1.7 deg^2. We performed z- and i-band imaging observations on 2016-01-06 UT. The exposure times were 60 sec and 45--50 sec for z-band and i-band, respectively. We covered 50 deg^2 around the high probability area in the northern skymap region of G211117 with 50 pointings of HSC. The 5-sigma limiting AB magnitudes are about 23--23.5 mag and 23.5--24 mag for z-band and i-band, respectively. The observed ares are listed below. # datetime(UT) RA DEC filter exptime 2016-01-07T10:24:04.9 04:40:57.4 +47:21:12 HSC-i 45.0 2016-01-07T10:22:45.7 04:41:08.8 +47:21:43 HSC-i 45.0 2016-01-07T10:21:25.8 04:36:06.7 +46:34:03 HSC-i 45.0 2016-01-07T10:20:06.9 04:36:17.9 +46:34:34 HSC-i 45.0 2016-01-07T10:18:49.2 04:31:25.9 +45:46:47 HSC-i 45.0 2016-01-07T10:17:28.0 04:31:37.0 +45:47:18 HSC-i 45.0 2016-01-07T10:16:10.3 04:26:54.4 +44:59:23 HSC-i 45.0 2016-01-07T10:14:52.7 04:27:05.4 +44:59:54 HSC-i 45.0 2016-01-07T10:13:31.5 04:22:31.9 +44:11:50 HSC-i 45.0 2016-01-07T10:12:12.7 04:22:42.7 +44:12:21 HSC-i 45.0 2016-01-07T10:10:54.0 04:18:17.8 +43:24:09 HSC-i 45.0 2016-01-07T10:09:33.7 04:18:28.4 +43:24:40 HSC-i 45.0 2016-01-07T10:08:16.6 04:16:37.8 +44:11:50 HSC-i 45.0 2016-01-07T10:06:55.4 04:16:48.6 +44:12:21 HSC-i 45.0 2016-01-07T10:05:37.1 04:14:11.8 +42:36:20 HSC-i 45.0 2016-01-07T10:04:20.1 04:14:22.3 +42:36:51 HSC-i 45.0 2016-01-07T10:03:03.1 04:12:29.4 +43:24:09 HSC-i 45.0 2016-01-07T10:01:42.5 04:12:40.1 +43:24:40 HSC-i 45.0 2016-01-07T10:00:25.1 04:10:13.5 +41:48:22 HSC-i 45.0 2016-01-07T09:59:04.7 04:10:23.8 +41:48:53 HSC-i 45.0 2016-01-07T09:57:47.7 04:08:28.9 +42:36:20 HSC-i 45.0 2016-01-07T09:56:29.8 04:08:39.4 +42:36:51 HSC-i 45.0 2016-01-07T09:55:12.4 04:04:36.0 +41:48:22 HSC-i 45.0 2016-01-07T09:53:55.2 04:04:46.3 +41:48:53 HSC-i 45.0 2016-01-07T09:52:37.3 04:01:47.3 +41:00:37 HSC-i 45.0 2016-01-07T09:51:19.9 04:01:57.5 +41:01:08 HSC-i 45.0 2016-01-07T09:50:02.2 03:58:58.6 +40:13:26 HSC-i 45.0 2016-01-07T09:48:44.3 03:59:08.7 +40:13:57 HSC-i 45.0 2016-01-07T09:47:27.1 03:56:09.9 +39:26:48 HSC-i 45.0 2016-01-07T09:46:09.0 03:56:19.9 +39:27:19 HSC-i 45.0 2016-01-07T09:44:51.8 03:53:21.1 +40:13:26 HSC-i 45.0 2016-01-07T09:43:29.6 03:53:31.2 +40:13:57 HSC-i 45.0 2016-01-07T09:42:12.9 03:53:21.2 +38:40:40 HSC-i 45.0 2016-01-07T09:40:55.3 03:53:31.1 +38:41:12 HSC-i 45.0 2016-01-07T09:39:37.2 03:50:32.5 +37:55:02 HSC-i 45.0 2016-01-07T09:38:20.4 03:50:42.3 +37:55:33 HSC-i 45.0 2016-01-07T09:37:02.7 03:50:32.4 +39:26:48 HSC-i 45.0 2016-01-07T09:35:44.5 03:50:42.4 +39:27:19 HSC-i 45.0 2016-01-07T09:34:19.7 03:47:43.8 +37:09:53 HSC-i 45.0 2016-01-07T09:33:02.7 03:47:53.5 +37:10:24 HSC-i 45.0 2016-01-07T09:31:45.5 03:47:43.7 +38:40:40 HSC-i 45.0 2016-01-07T09:30:27.7 03:47:53.6 +38:41:12 HSC-i 45.0 2016-01-07T09:29:09.9 03:44:55.0 +37:55:02 HSC-i 45.0 2016-01-07T09:27:53.0 03:45:04.8 +37:55:34 HSC-i 45.0 2016-01-07T09:25:55.2 02:43:03.3 +21:22:40 HSC-i 45.0 2016-01-07T09:24:37.0 02:43:11.6 +21:23:11 HSC-i 45.0 2016-01-07T09:23:18.8 02:45:52.0 +22:01:12 HSC-i 45.0 2016-01-07T09:22:01.7 02:46:00.3 +22:01:43 HSC-i 45.0 2016-01-07T09:20:44.1 02:48:40.7 +22:39:55 HSC-i 45.0 2016-01-07T09:19:24.5 02:48:49.1 +22:40:26 HSC-i 45.0 2016-01-07T09:18:04.2 02:51:29.4 +23:18:49 HSC-i 45.0 2016-01-07T09:16:47.2 02:51:37.9 +23:19:20 HSC-i 45.0 2016-01-07T09:15:29.9 02:54:18.2 +23:57:55 HSC-i 45.0 2016-01-07T09:14:11.0 02:54:26.6 +23:58:26 HSC-i 45.0 2016-01-07T09:12:50.7 02:54:18.1 +25:16:42 HSC-i 45.0 2016-01-07T09:11:30.7 02:54:26.7 +25:17:13 HSC-i 45.0 2016-01-07T09:10:12.7 02:57:06.9 +24:37:12 HSC-i 45.0 2016-01-07T09:08:54.8 02:57:15.4 +24:37:43 HSC-i 45.0 2016-01-07T09:07:37.1 02:57:06.9 +25:56:25 HSC-i 45.0 2016-01-07T09:06:17.6 02:57:15.4 +25:56:56 HSC-i 45.0 2016-01-07T09:04:58.1 02:59:55.6 +26:36:21 HSC-i 45.0 2016-01-07T09:03:40.7 03:00:04.2 +26:36:52 HSC-i 45.0 2016-01-07T09:02:22.2 02:59:55.6 +25:16:42 HSC-i 45.0 2016-01-07T09:01:04.9 03:00:04.2 +25:17:13 HSC-i 45.0 2016-01-07T08:59:47.6 03:02:44.3 +27:16:31 HSC-i 45.0 2016-01-07T08:58:29.5 03:02:53.0 +27:17:02 HSC-i 45.0 2016-01-07T08:57:10.5 03:02:44.4 +25:56:25 HSC-i 45.0 2016-01-07T08:55:53.8 03:02:52.9 +25:56:56 HSC-i 45.0 2016-01-07T08:54:36.9 03:05:33.0 +27:56:56 HSC-i 45.0 2016-01-07T08:53:19.1 03:05:41.8 +27:57:27 HSC-i 45.0 2016-01-07T08:52:02.3 03:05:33.1 +26:36:21 HSC-i 45.0 2016-01-07T08:50:45.7 03:05:41.7 +26:36:52 HSC-i 45.0 2016-01-07T08:49:28.8 03:08:21.8 +28:37:36 HSC-i 45.0 2016-01-07T08:48:09.5 03:08:30.6 +28:38:07 HSC-i 45.0 2016-01-07T08:46:50.0 03:11:10.5 +29:18:32 HSC-i 45.0 2016-01-07T08:45:33.7 03:11:19.3 +29:19:03 HSC-i 45.0 2016-01-07T08:44:16.8 03:13:59.2 +29:59:44 HSC-i 45.0 2016-01-07T08:42:57.3 03:14:08.1 +30:00:16 HSC-i 45.0 2016-01-07T08:41:17.4 03:22:25.3 +33:30:21 HSC-i 45.0 2016-01-07T08:40:00.3 03:22:34.5 +33:30:52 HSC-i 45.0 2016-01-07T08:38:33.9 03:16:47.9 +30:41:14 HSC-i 50.0 2016-01-07T08:37:11.5 03:16:56.9 +30:41:45 HSC-i 50.0 2016-01-07T08:35:15.4 03:42:06.3 +37:09:52 HSC-i 50.0 2016-01-07T08:33:53.1 03:42:16.0 +37:10:24 HSC-i 50.0 2016-01-07T08:31:49.1 03:19:36.6 +31:23:02 HSC-i 50.0 2016-01-07T08:30:26.3 03:19:45.7 +31:23:33 HSC-i 50.0 2016-01-07T08:29:03.3 03:22:25.3 +32:05:08 HSC-i 50.0 2016-01-07T08:27:41.7 03:22:34.5 +32:05:39 HSC-i 50.0 2016-01-07T08:26:19.6 03:25:14.1 +32:47:34 HSC-i 50.0 2016-01-07T08:24:56.4 03:25:23.2 +32:48:05 HSC-i 50.0 2016-01-07T08:22:53.2 03:39:17.6 +36:25:09 HSC-i 50.0 2016-01-07T08:21:30.9 03:39:27.2 +36:25:40 HSC-i 50.0 2016-01-07T08:19:34.2 03:28:02.8 +33:30:21 HSC-i 50.0 2016-01-07T08:18:12.1 03:28:12.0 +33:30:52 HSC-i 50.0 2016-01-07T08:16:50.1 03:30:51.5 +34:13:28 HSC-i 50.0 2016-01-07T08:15:23.8 03:31:00.8 +34:13:59 HSC-i 50.0 2016-01-07T08:14:01.7 03:36:28.9 +35:40:52 HSC-i 50.0 2016-01-07T08:12:37.4 03:36:38.4 +35:41:23 HSC-i 50.0 2016-01-07T08:11:10.5 03:33:40.2 +34:56:58 HSC-i 50.0 2016-01-07T08:09:48.7 03:33:49.6 +34:57:29 HSC-i 50.0 2016-01-07T07:37:39.2 02:43:03.3 +21:22:39 HSC-z 60.0 2016-01-07T07:36:06.1 02:43:11.6 +21:23:11 HSC-z 60.0 2016-01-07T07:34:32.4 02:45:52.0 +22:01:12 HSC-z 60.0 2016-01-07T07:32:59.8 02:46:00.3 +22:01:43 HSC-z 60.0 2016-01-07T07:31:27.7 02:48:40.7 +22:39:55 HSC-z 60.0 2016-01-07T07:29:54.8 02:48:49.1 +22:40:26 HSC-z 60.0 2016-01-07T07:28:22.5 02:51:29.4 +23:18:49 HSC-z 60.0 2016-01-07T07:26:50.8 02:51:37.9 +23:19:20 HSC-z 60.0 2016-01-07T07:25:17.8 02:54:18.2 +23:57:55 HSC-z 60.0 2016-01-07T07:23:45.0 02:54:26.6 +23:58:26 HSC-z 60.0 2016-01-07T07:22:12.6 02:54:18.1 +25:16:42 HSC-z 60.0 2016-01-07T07:20:39.9 02:54:26.7 +25:17:13 HSC-z 60.0 2016-01-07T07:19:06.7 02:57:06.9 +24:37:12 HSC-z 60.0 2016-01-07T07:17:35.1 02:57:15.4 +24:37:43 HSC-z 60.0 2016-01-07T07:15:58.3 02:57:06.9 +25:56:25 HSC-z 60.0 2016-01-07T07:14:26.3 02:57:15.4 +25:56:56 HSC-z 60.0 2016-01-07T07:12:11.1 03:16:47.9 +30:41:14 HSC-z 60.0 2016-01-07T07:10:37.4 03:16:56.9 +30:41:45 HSC-z 60.0 2016-01-07T07:08:20.8 03:42:06.3 +37:09:52 HSC-z 60.0 2016-01-07T07:06:48.7 03:42:16.0 +37:10:24 HSC-z 60.0 2016-01-07T07:04:30.3 03:19:36.6 +31:23:02 HSC-z 60.0 2016-01-07T07:02:58.4 03:19:45.7 +31:23:33 HSC-z 60.0 2016-01-07T07:01:26.4 03:22:25.3 +32:05:08 HSC-z 60.0 2016-01-07T06:59:52.6 03:22:34.5 +32:05:39 HSC-z 60.0 2016-01-07T06:58:18.9 03:25:14.1 +32:47:34 HSC-z 60.0 2016-01-07T06:56:45.3 03:25:23.2 +32:48:05 HSC-z 60.0 2016-01-07T06:54:42.7 03:39:17.6 +36:25:09 HSC-z 60.0 2016-01-07T06:53:10.3 03:39:27.2 +36:25:40 HSC-z 60.0 2016-01-07T06:51:05.6 03:28:02.8 +33:30:21 HSC-z 60.0 2016-01-07T06:49:32.8 03:28:12.0 +33:30:52 HSC-z 60.0 2016-01-07T06:48:01.3 03:30:51.5 +34:13:28 HSC-z 60.0 2016-01-07T06:46:23.9 03:31:00.8 +34:13:59 HSC-z 60.0 2016-01-07T06:44:51.8 03:36:28.9 +35:40:52 HSC-z 60.0 2016-01-07T06:43:19.1 03:36:38.4 +35:41:23 HSC-z 60.0 2016-01-07T06:41:46.4 03:33:40.2 +34:56:58 HSC-z 60.0 2016-01-07T06:40:14.5 03:33:49.6 +34:57:29 HSC-z 60.0 2016-01-07T06:38:03.5 04:40:57.4 +47:21:12 HSC-z 60.0 2016-01-07T06:36:23.0 04:41:08.8 +47:21:43 HSC-z 60.0 2016-01-07T06:34:51.1 04:36:06.7 +46:34:03 HSC-z 60.0 2016-01-07T06:33:19.2 04:36:17.9 +46:34:34 HSC-z 60.0 2016-01-07T06:31:45.8 04:31:25.9 +45:46:47 HSC-z 60.0 2016-01-07T06:30:12.9 04:31:37.0 +45:47:18 HSC-z 60.0 2016-01-07T06:28:40.4 04:26:54.4 +44:59:22 HSC-z 60.0 2016-01-07T06:27:08.3 04:27:05.4 +44:59:54 HSC-z 60.0 2016-01-07T06:25:36.0 04:22:31.9 +44:11:50 HSC-z 60.0 2016-01-07T06:24:03.2 04:22:42.7 +44:12:21 HSC-z 60.0 2016-01-07T06:22:29.7 04:18:17.8 +43:24:09 HSC-z 60.0 2016-01-07T06:20:58.4 04:18:28.5 +43:24:40 HSC-z 60.0 2016-01-07T06:19:17.3 04:16:37.8 +44:11:50 HSC-z 60.0 2016-01-07T06:17:44.4 04:16:48.6 +44:12:21 HSC-z 60.0 2016-01-07T06:16:09.9 04:14:11.8 +42:36:20 HSC-z 60.0 2016-01-07T06:14:38.4 04:14:22.3 +42:36:51 HSC-z 60.0 2016-01-07T06:13:05.3 04:12:29.4 +43:24:09 HSC-z 60.0 2016-01-07T06:11:31.3 04:12:40.1 +43:24:40 HSC-z 60.0 2016-01-07T06:09:52.1 04:10:13.5 +41:48:22 HSC-z 60.0 2016-01-07T06:08:19.6 04:10:23.8 +41:48:53 HSC-z 60.0 2016-01-07T06:06:46.2 04:08:28.9 +42:36:20 HSC-z 60.0 2016-01-07T06:05:12.9 04:08:39.4 +42:36:51 HSC-z 60.0 2016-01-07T06:03:40.6 04:04:36.0 +41:48:22 HSC-z 60.0 2016-01-07T06:02:08.0 04:04:46.3 +41:48:53 HSC-z 60.0 2016-01-07T06:00:35.4 04:01:47.3 +41:00:37 HSC-z 60.0 2016-01-07T05:59:01.4 04:01:57.5 +41:01:08 HSC-z 60.0 2016-01-07T05:57:29.8 03:58:58.6 +40:13:26 HSC-z 60.0 2016-01-07T05:55:58.0 03:59:08.7 +40:13:57 HSC-z 60.0 2016-01-07T05:54:25.0 03:56:09.9 +39:26:48 HSC-z 60.0 2016-01-07T05:52:52.3 03:56:19.9 +39:27:19 HSC-z 60.0 2016-01-07T05:51:20.6 03:53:21.1 +40:13:26 HSC-z 60.0 2016-01-07T05:49:48.5 03:53:31.2 +40:13:57 HSC-z 60.0 2016-01-07T05:48:15.7 03:53:21.2 +38:40:40 HSC-z 60.0 2016-01-07T05:46:43.5 03:53:31.1 +38:41:12 HSC-z 60.0 2016-01-07T05:45:11.9 03:50:32.5 +37:55:02 HSC-z 60.0 2016-01-07T05:43:39.4 03:50:42.3 +37:55:33 HSC-z 60.0 2016-01-07T05:42:07.1 03:50:32.4 +39:26:48 HSC-z 60.0 2016-01-07T05:40:33.7 03:50:42.4 +39:27:19 HSC-z 60.0 2016-01-07T05:39:02.1 03:47:43.8 +37:09:53 HSC-z 60.0 2016-01-07T05:37:30.7 03:47:53.5 +37:10:24 HSC-z 60.0 2016-01-07T05:35:57.1 03:47:43.7 +38:40:40 HSC-z 60.0 2016-01-07T05:34:23.9 03:47:53.6 +38:41:12 HSC-z 60.0 2016-01-07T05:32:52.3 03:44:55.0 +37:55:02 HSC-z 60.0 2016-01-07T05:31:20.4 03:45:04.8 +37:55:33 HSC-z 60.0 2016-01-07T05:29:09.5 02:59:55.6 +26:36:21 HSC-z 60.0 2016-01-07T05:27:37.0 03:00:04.2 +26:36:52 HSC-z 60.0 2016-01-07T05:26:02.7 02:59:55.6 +25:16:42 HSC-z 60.0 2016-01-07T05:24:25.8 03:00:04.2 +25:17:13 HSC-z 60.0 2016-01-07T05:22:19.8 03:02:44.3 +27:16:31 HSC-z 60.0 2016-01-07T05:20:47.7 03:02:53.0 +27:17:02 HSC-z 60.0 2016-01-07T05:19:15.3 03:02:44.4 +25:56:25 HSC-z 60.0 2016-01-07T05:17:43.7 03:02:53.0 +25:56:56 HSC-z 60.0 2016-01-07T05:16:09.3 03:05:33.0 +27:56:56 HSC-z 60.0 2016-01-07T05:14:36.2 03:05:41.8 +27:57:27 HSC-z 60.0 2016-01-07T05:13:02.9 03:05:33.1 +26:36:21 HSC-z 60.0 2016-01-07T05:11:30.9 03:05:41.7 +26:36:52 HSC-z 60.0 2016-01-07T05:09:56.0 03:08:21.8 +28:37:36 HSC-z 60.0 2016-01-07T05:08:21.3 03:08:30.6 +28:38:07 HSC-z 60.0 2016-01-07T05:06:49.9 03:11:10.5 +29:18:32 HSC-z 60.0 2016-01-07T05:05:16.2 03:11:19.3 +29:19:03 HSC-z 60.0 2016-01-07T05:03:43.6 03:13:59.2 +29:59:45 HSC-z 60.0 2016-01-07T05:02:11.3 03:14:08.1 +30:00:15 HSC-z 60.0 2016-01-07T05:00:35.3 03:22:25.3 +33:30:21 HSC-z 60.0 2016-01-07T04:59:03.6 03:22:34.5 +33:30:52 HSC-z 60.0