TITLE: GCN CIRCULAR NUMBER: 26923 SUBJECT: LIGO/Virgo S200128d: No counterpart candidates in KAIT observations DATE: 20/01/29 05:01:15 GMT FROM: Weikang Zheng at UC Berkeley Shaunak Modak, Andrew Hoffman, Nachiket Girish, Yukei Murakami, WeiKang Zheng, 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-wave event S200128d (GCN 26906) 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 100 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 02:32:19, Jan. 28th UT, about 12.0 minutes after the trigger, and the last image at 10:19:35 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(Jan28) RA_J2000 Dec_J2000 ----------------------------------------------- G0696216 02:32:19 01:17:45.1378 -25:50:21.1524 G0795121 02:33:30 01:37:49.0049 -23:38:01.3056 G0882384 02:34:39 01:44:47.0527 -23:23:18.2724 G1619053 02:35:52 01:45:50.352 -09:18:49.428 G0665450 02:37:06 01:47:45.3487 -21:50:00.51 G0824841 02:38:15 01:48:39.0418 -18:43:43.212 G0784259 02:39:27 01:49:47.124 -21:54:26.9496 G0710198 02:40:37 01:52:03.413 -20:09:58.4748 G0571685 02:41:46 01:56:32.7274 -20:02:54.114 G0747645 02:42:58 01:57:01.9176 -17:01:23.4948 G0648368 02:44:07 01:59:04.5048 -19:30:01.4292 G0565331 02:45:16 02:01:06.5748 -18:53:47.8644 G0814247 02:46:25 02:01:28.493 -18:04:01.8768 G0817926 02:47:35 02:01:46.837 -16:24:20.934 G1614837 02:48:46 02:03:34.632 -09:25:40.188 G0816503 02:49:57 02:04:09.7622 -15:58:48.4284 G0786849 02:51:07 02:04:59.6902 -16:08:05.1684 G0750785 02:52:16 02:05:29.7775 -18:02:35.2572 G0656369 02:53:25 02:10:30.553 -13:29:37.0176 G0081229 02:54:35 02:11:53.1912 -12:06:25.776 G0731349 02:55:46 02:25:23.2416 -07:50:24.2664 G0594730 02:56:55 02:26:58.9747 -04:35:26.9484 G0633562 02:58:05 02:27:09.342 -02:52:19.956 G0001576 02:59:14 02:30:42.8393 -02:56:20.4144 G0653886 03:00:23 02:36:56.6858 -02:11:59.1648 G1139246 03:01:35 02:47:12.2479 +05:39:53.6004 G0756115 03:02:46 02:57:53.0868 +13:01:50.8656 G0641223 03:03:55 02:58:57.8184 +13:34:58.332 G0576258 03:05:14 03:41:17.3546 +26:40:14.7324 G0582436 03:06:25 03:54:09.8887 +34:07:08.4396 G0731349 03:50:59 02:25:23.2416 -07:50:24.2664 G0594730 03:52:09 02:26:58.9747 -04:35:26.9484 G0001576 03:54:27 02:30:42.8393 -02:56:20.4144 G0653886 03:55:37 02:36:56.6858 -02:11:59.1648 G1139246 03:56:48 02:47:12.2479 +05:39:53.6004 G0756115 03:57:59 02:57:53.0868 +13:01:50.8656 G0641223 03:59:09 02:58:57.8184 +13:34:58.332 G0576258 04:00:25 03:41:17.3546 +26:40:14.7324 G0582436 04:01:37 03:54:09.8887 +34:07:08.4396 G0770459 04:52:59 04:09:18.3919 +33:53:23.9172 G0796246 04:54:16 04:11:56.4852 +39:30:13.32 G0565674 04:55:26 04:17:34.9824 +36:08:05.1144 G1167642 04:56:35 04:21:29.436 +36:56:57.2568 G0650034 04:57:44 04:22:59.9047 +43:06:38.844 G0609806 04:58:56 04:28:28.9546 +38:21:29.9592 G0487836 05:00:05 04:30:09.049 +42:44:48.8076 G0649095 05:01:14 04:38:28.3392 +44:02:13.6752 G0736266 05:02:26 04:38:58.2751 +39:16:50.6856 G0567652 05:03:35 04:41:00.9706 +37:10:40.3248 G0734583 05:04:44 04:43:34.3745 +38:12:34.4592 G0791297 05:05:56 04:49:09.0638 +45:00:39.3984 G0726428 05:07:05 04:49:37.8058 +43:47:43.5876 G0651979 05:08:15 04:50:06.6852 +45:03:05.7384 G1509641 05:09:47 05:42:36.336 +49:51:07.38 G0225879 05:11:12 05:53:42.9274 +53:37:11.3232 G0630005 05:12:25 06:02:29.2512 +50:43:10.2864 G0599403 05:13:53 06:59:38.13 +54:11:47.3424 G1418861 05:15:02 07:04:52.1942 +55:35:28.3812 G0646693 05:16:13 07:20:26.6839 +56:23:27.1968 G0476768 05:17:32 08:00:08.5181 +56:21:56.232 G0671466 05:18:41 08:01:45.9026 +56:33:12.0564 G0615908 05:19:57 08:58:36.4855 +54:19:02.676 G0701014 05:21:06 09:01:30.0953 +55:39:16.6356 G0706321 05:22:17 09:35:58.8941 +54:36:39.0384 G0761971 05:23:29 09:46:53.3424 +54:26:45.2544 G0575796 07:34:10 10:32:38.4924 +53:09:24.0516 G0631724 07:35:17 10:33:47.8418 +52:22:16.4748 G0776673 07:36:35 10:37:12.2278 +50:07:14.3184 G0784581 07:37:48 10:38:51.8261 +53:58:18.9264 G0273464 07:38:59 10:48:09.3127 +48:19:53.2668 G0600260 07:40:09 10:51:31.6625 +49:30:08.6652 G0899439 07:41:19 11:04:22.3205 +48:38:11.3352 G0576057 07:42:28 11:06:10.4479 +48:16:03.6804 G0234381 07:43:39 11:21:35.8886 +48:02:52.2924 G0726921 07:44:49 11:24:06.4819 +48:41:46.518 G0609396 07:45:58 11:24:27.323 +48:52:45.8076 G0827094 07:47:10 11:43:39.5911 +46:21:20.2932 G0732456 07:48:21 12:04:57.9053 +43:08:59.0316 G0639300 07:49:31 12:06:13.4436 +45:20:01.176 G0769163 07:50:40 12:12:16.9848 +45:30:49.7556 G1437067 07:51:49 12:15:59.4799 +41:22:29.478 G1836334 07:52:58 12:16:07.92 +40:36:49.32 G0668285 07:54:08 12:16:46.5235 +44:40:15.8124 G0810953 07:55:17 12:21:13.147 +41:52:13.9476 G1699892 07:56:26 12:26:42.24 +43:47:04.056 G0787284 07:57:36 12:27:55.0891 +45:26:58.452 G1817097 07:58:45 12:28:48.72 +44:52:08.58 G0783585 07:59:55 12:30:34.9877 +42:11:29.9544 G0613621 08:01:04 12:31:54.6314 +40:34:25.2084 G0356212 08:02:14 12:34:18.4534 +40:49:34.7808 G0881944 08:03:23 12:35:09.3823 +39:27:05.634 G0571256 08:04:33 12:38:43.5792 +41:33:07.7148 G0761416 08:05:42 12:42:10.2612 +42:02:21.1884 G0782000 10:10:14 13:06:56.737 +18:53:53.6892 G1143431 10:12:33 13:07:18.8268 +17:41:53.7972 G0750196 10:13:42 13:07:34.0577 +16:21:22.8204 G1143718 10:14:52 13:08:22.0642 +15:42:20.9808 G1435594 10:16:03 13:08:45.3038 +18:46:13.1016 G0743613 10:18:26 13:11:03.534 +19:01:12.8244 G0595223 10:19:35 13:12:38.1151 +15:38:21.0408