TITLE: GCN CIRCULAR NUMBER: 25109 SUBJECT: LIGO/Virgo S190718y: No counterpart candidates in KAIT observations DATE: 19/07/19 22:22:54 GMT FROM: Weikang Zheng at UC Berkeley Nachiket Girish, Sergiy Vasylyev, Keto Zhang, WeiKang Zheng, Andrew Hoffman, Benjamin Stahl, and Alexei V. Filippenko (UC Berkeley) report on behalf of the Lick/KAIT GW follow-up team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, observed the 90% region of the gravitational-wavei event S190718y (GCN 25087; GCN 25107) detected by LIGO/Virgo. More than one thousand galaxies were selected from the Glade catalog V1.0 (Dalya et al., 2018, MNRAS, 479, 2374; http://aquarius.elte.hu/glade/) according to their priority score. KAIT observed 209 of them based on their priority scores and elevation visibility, with each clear-filter exposure time being 60 s. The first image was taken at 04:56:24, July 19th UT, about 14.4 hours after the trigger, and the last image at 11:34:24 UT. Our typical limiting mag is 19.0. No viable counterparts were identified and the analysis is ongoing. A full list of galaxies observed by KAIT is given below. GladeID UT(July19) RA_J2000 Dec_J2000 ----------------------------------------------- G0623381 04:56:24 19:20:57.4073 +43:07:57.2052 G0655708 04:57:39 19:36:18.7061 +37:48:07.0164 G1132664 04:58:57 20:11:08.335 +45:15:15.8904 G0172766 05:00:14 20:15:02.6366 +31:40:50.8296 G0419718 05:01:32 20:16:30.2345 +44:21:15.2244 G0673986 05:02:51 20:16:34.5043 +26:58:34.4244 G1298003 05:04:11 20:17:45.769 +45:50:47.634 G0287573 05:05:30 20:19:38.1226 +27:00:10.9368 G0998960 05:06:52 20:19:51.2474 +48:16:20.5572 G1457918 05:08:15 20:20:02.3364 +25:08:48.0444 G1243102 05:09:25 20:21:42.3341 +26:55:00.642 G0289368 05:10:46 20:24:08.1226 +46:28:07.7484 G0002313 05:12:08 20:24:20.2296 +27:03:49.9032 G0418118 05:13:27 20:24:50.8008 +43:02:35.0304 G0639498 05:14:46 20:28:28.8427 +25:43:24.1932 G0563453 05:15:55 20:28:35.0611 +25:44:00.1788 G0041653 05:17:15 20:28:44.9779 +45:41:01.1724 G0721807 05:18:37 20:29:05.9693 +24:42:22.5576 G0428552 05:19:50 20:29:39.463 +32:37:34.4892 G0312245 05:20:59 20:30:29.1065 +33:36:02.8224 G0645883 05:22:11 20:30:29.5531 +27:40:42.906 G0414637 05:23:22 20:30:43.7182 +33:00:07.9092 G1207128 05:24:33 20:37:17.7101 +25:31:37.7652 G1439906 05:25:45 20:38:34.4604 +34:03:23.3172 G0452646 05:26:56 20:38:46.6332 +28:18:13.9572 G1405973 05:28:06 20:39:22.0385 +27:42:40.7952 G1467496 05:29:15 20:39:22.8662 +29:33:27.792 G0217063 05:30:26 20:40:35.5738 +37:40:18.282 G1429059 05:31:37 20:40:46.6478 +30:07:10.6356 G0171171 05:32:49 20:42:15.6372 +37:40:31.4544 G0628332 05:52:51 20:44:09.7999 +33:59:41.5968 G0776012 05:54:03 20:45:56.9458 +28:31:56.0208 G0057545 05:55:14 20:46:38.9942 +36:31:22.7424 G1172157 05:56:23 20:49:25.6788 +33:20:57.714 G1117494 05:57:33 20:53:42.81 +37:56:12.0336 G0142750 05:58:48 20:57:57.7296 +41:06:53.3484 G1069636 05:59:57 21:00:42.2242 +39:53:22.6644 G0862987 06:01:07 21:05:12.3926 +40:46:35.4036 G1444432 06:02:16 21:06:54.9828 +39:55:27.264 G0233317 06:03:25 21:07:28.6963 +40:01:22.026 G1449915 06:04:35 21:08:52.7638 +42:14:50.964 G0175642 06:05:54 21:13:55.752 +51:17:37.68 G0416212 06:07:10 21:14:41.0669 +44:06:32.5836 G1086036 06:08:19 21:14:47.4756 +42:31:12.7308 G1474801 06:09:28 21:16:49.9291 +41:36:48.4164 G1054563 06:10:38 21:18:05.1929 +43:57:30.7512 G0959572 06:11:47 21:18:57.8978 +40:50:12.012 G0778794 06:13:03 21:20:30.066 +37:35:00.2292 G0002434 06:14:14 21:20:42.4805 +44:23:59.0712 G0705251 06:15:23 21:21:39.0454 +44:03:49.9572 G0003499 06:16:35 21:35:32.688 +35:23:54.168 G0636708 06:17:44 21:36:39.353 +35:41:40.8444 G0811558 06:49:28 19:21:10.0488 +43:56:44.3184 G0800990 06:50:37 19:21:31.9044 +43:59:43.4508 G0789501 06:51:47 19:22:31.9922 +44:03:38.5884 G0746609 06:52:56 19:29:59.7144 +43:28:28.8948 G1418181 06:54:18 20:02:49.8852 +49:19:11.2296 G0383988 06:55:29 20:19:01.4722 +44:31:54.642 G0210012 06:56:38 20:21:56.1694 +46:35:14.4024 G0348545 06:57:48 20:23:03.2959 +45:55:17.3208 G0446797 06:59:02 21:09:03.8964 +42:36:11.4624 G0415024 07:00:26 21:11:57.0557 +54:14:51.6228 G1149403 07:01:47 21:13:38.5253 +42:10:46.2972 G1060955 07:02:57 21:17:24.7558 +43:07:26.7312 G0044507 07:04:16 21:18:24.9902 +51:23:57.7104 G1111208 07:05:36 21:18:33.6475 +40:59:52.5696 G1116069 07:06:45 21:19:05.2882 +42:27:31.122 G1367883 07:07:54 21:20:58.5499 +38:03:24.3324 G0305271 07:09:06 21:23:06.7896 +43:29:21.3684 G0540762 07:10:15 21:25:36.1303 +47:42:24.3792 G1394842 07:11:26 21:26:50.0244 +38:12:04.698 G1407104 07:12:36 21:31:30.7764 +38:56:38.1552 G1112914 07:13:47 21:42:08.5913 +33:56:54.2364 G1243714 07:14:56 21:45:18.7279 +34:27:32.22 G0275039 07:16:06 21:49:28.3226 +36:06:06.0228 G0553168 07:18:56 21:53:38.8622 +32:47:28.77 G1460879 07:21:45 21:54:08.7305 +32:54:24.876 G0692325 07:51:02 22:01:07.3901 +16:33:50.1228 G0643019 07:52:24 22:04:40.1441 -16:57:46.3788 G0651982 07:53:46 22:05:40.8912 +16:47:06.72 G0717972 07:54:55 22:09:01.5161 +17:49:17.3136 G0663093 07:56:04 22:09:02.5634 +17:50:19.3164 G0695974 07:57:16 22:11:35.376 +25:51:51.7752 G0798670 07:58:29 22:21:47.6148 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