TITLE: GCN CIRCULAR NUMBER: 25028 SUBJECT: LIGO/Virgo S190706ai: No counterpart candidates in KAIT observations DATE: 19/07/08 04:26:29 GMT FROM: Weikang Zheng at UC Berkeley Shaunak Modak, Yukei Murakami, Andrew Hoffman, Thomas de Jaeger, Sergiy Vasylyev, Benjamin Stahl, Keto Zhang, WeiKang Zheng, Nachiket Girish, 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 S190706ai (GCN 24998) 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 129 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 04:22:48, July 7th UT, about 5.9 hours after the trigger, and the last image at 07:18:41 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(July07) RA_J2000 Dec_J2000 ----------------------------------------------- G0777412 04:22:48 12:13:30.498 +61:02:32.7372 G0571516 04:23:57 12:14:48.589 +59:54:21.9384 G0564638 04:25:06 12:16:06.599 +60:35:13.2072 G0904927 04:26:16 12:17:20.5774 +60:52:59.4984 G0787109 04:27:25 12:17:49.7863 +61:29:39.5808 G1199777 04:28:34 12:19:32.0654 +62:09:19.7676 G0732275 04:29:44 12:20:24.5472 +61:05:59.9388 G0698214 04:30:53 12:20:54.5875 +61:59:34.9656 G0565645 04:32:11 12:22:30.8093 +63:54:11.2788 G0682903 04:33:20 12:23:01.0913 +61:42:26.2044 G0765680 04:34:29 12:23:05.2368 +63:13:21.1764 G1908371 04:35:39 12:23:42.9859 +62:56:25.4904 G0790650 04:36:48 12:24:08.4082 +63:38:49.7184 G1709689 04:38:03 12:24:12.24 +58:50:13.308 G0605386 04:39:13 12:24:24.895 +61:50:36.8124 G0656354 04:40:22 12:24:26.2243 +61:31:48.8316 G0634570 04:41:31 12:24:41.8104 +63:23:31.812 G0584909 04:42:41 12:24:42.7039 +61:28:14.8044 G0682297 04:43:50 12:25:19.6802 +61:45:06.7968 G0726198 04:44:59 12:25:43.3375 +62:45:37.7532 G0735369 04:46:09 12:25:44.0587 +61:31:12.7416 G0592302 04:47:18 12:25:53.2325 +62:25:44.652 G0689229 04:48:27 12:27:20.1526 +63:09:45.6264 G0251572 04:49:37 12:28:02.3621 +63:31:13.3752 G0648442 04:50:46 12:29:30.9082 +62:48:36.2376 G0722728 04:51:57 12:30:12.1363 +56:42:07.9812 G0367866 04:53:07 12:31:17.8308 +57:49:48.8172 G0687685 04:54:16 12:31:50.2625 +58:21:28.9296 G0579241 04:55:34 12:31:53.8111 +64:39:09.4824 G0800642 04:56:43 12:31:53.9318 +62:40:16.4964 G0749448 05:06:43 12:32:17.069 +63:57:21.6324 G0801641 05:09:04 12:34:43.7952 +61:24:53.604 G0695406 05:10:13 12:34:51.9103 +58:55:00.21 G0769962 05:11:23 12:34:54.1663 +61:42:25.74 G0505896 05:13:41 12:36:11.4038 +58:04:16.9428 G0606955 05:14:51 12:36:48.977 +62:04:38.4348 G0777685 05:16:00 12:39:54.3677 +61:12:41.4072 G0577774 05:17:09 12:40:07.8295 +62:46:10.4916 G0606869 05:18:18 12:40:34.6764 +62:49:17.382 G0697940 05:19:28 12:41:22.4779 +61:42:42.2856 G0641380 05:21:46 12:42:03.6475 +59:51:16.596 G0818263 05:22:56 12:42:05.4235 +63:06:44.982 G0779598 05:24:05 12:42:23.7158 +60:08:04.8696 G0570567 05:25:15 12:42:39.1003 +61:41:09.4524 G0718455 05:26:24 12:42:54.4519 +63:16:37.5168 G0554983 05:27:35 12:43:00.9559 +56:43:50.5956 G0554755 05:28:46 12:43:05.8154 +63:34:51.4956 G0722161 05:29:56 12:43:19.7827 +58:57:53.6148 G0575799 05:31:05 12:43:51.599 +62:30:25.9416 G0823782 05:32:14 12:45:21.5954 +61:41:39.3756 G0086390 05:33:24 12:47:15.3991 +62:28:53.04 G0783845 05:34:33 12:48:03.0542 +62:36:33.2676 G0623276 05:35:43 12:48:33.7721 +62:27:39.1428 G0810253 05:36:52 12:48:39.9281 +62:37:03.18 G0556824 05:38:01 12:48:40.6054 +59:16:31.71 G0688939 05:39:11 12:49:23.3386 +58:25:15.6612 G0484524 05:40:22 12:50:13.5461 +63:33:58.0752 G0727440 05:47:09 12:52:05.3978 +60:31:45.6888 G0418402 05:48:27 12:52:08.335 +62:53:11.6664 G0790841 05:49:36 12:52:16.0253 +62:40:39.8568 G0695820 05:50:45 12:52:27.7368 +60:04:00.9444 G0551902 05:51:55 12:52:44.5092 +59:15:56.2356 G0797074 05:53:04 12:53:57.9859 +58:17:38.2164 G0562164 05:54:13 12:54:36.1817 +62:13:44.7852 G0741937 05:55:23 12:54:57.4769 +61:27:10.7568 G0644214 05:56:32 12:55:10.6421 +64:15:52.4592 G0752137 05:57:41 12:55:36.7457 +60:10:57.6552 G0792093 05:58:51 12:55:53.1847 +58:19:49.2852 G1463818 06:00:00 12:55:58.3483 +59:06:51.2316 G0644569 06:01:09 12:55:58.7292 +62:08:48.5952 G0763378 06:02:19 12:56:08.0016 +58:45:23.9364 G0501647 06:03:34 12:56:14.3299 +56:52:24.4236 G0764293 06:04:50 12:56:42.0593 +63:05:15.72 G0811967 06:05:59 12:57:12.1471 +63:37:41.5092 G0669049 06:07:08 12:57:57.5026 +62:26:22.4556 G0820710 06:08:18 12:58:20.7715 +61:30:39.33 G0733157 06:09:27 12:59:33.7025 +60:29:04.8624 G0581776 06:10:36 13:01:00.9706 +59:50:56.4504 G0668949 06:11:46 13:01:50.31 +58:19:35.6736 G0811935 06:12:55 13:02:32.6734 +61:28:02.118 G0767619 06:14:04 13:02:39.0307 +62:29:39.084 G0767436 06:15:13 13:02:57.5573 +62:28:51.7764 G0649830 06:16:23 13:04:11.88 +61:11:41.298 G0568950 06:17:32 13:05:01.9226 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