TITLE: GCN CIRCULAR NUMBER: 25531 SUBJECT: LIGO/Virgo S190828j: No counterpart candidates in KAIT observations DATE: 19/08/28 22:45:33 GMT FROM: Weikang Zheng at UC Berkeley Keto D. Zhang, Sergiy Vasylyev, Thomas de Jaeger, WeiKang Zheng, Andrew Hoffman, Benjamin E. Stahl, Yukei Murakami, 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 S190828j (GCN 25497) 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 84 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 07:10:51, Aug. 28th UT, about 37 minutes after the trigger, and the last image at 12:59:08 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(Aug28) RA_J2000 Dec_J2000 ----------------------------------------------- G1411338 07:10:51 00:00:42.1697 +62:28:27.9912 G0108194 07:12:09 00:02:34.6301 +59:10:45.9012 G1437181 07:13:18 00:04:43.1198 +60:54:53.7408 G1376191 07:14:27 00:04:50.1787 +61:08:02.7816 G0915623 07:15:37 00:06:55.8847 +60:56:16.6632 G0040914 07:16:46 00:09:18.455 +60:52:27.1164 G0023757 07:17:54 00:10:06.7973 +61:36:45.864 G0960102 07:19:03 00:10:20.1641 +60:46:39.81 G0857314 07:20:12 00:11:03.7274 +59:44:23.334 G0286480 07:21:22 00:12:01.2106 +59:41:10.5108 G1256548 07:22:31 00:13:02.2044 +59:55:55.596 G0382218 07:23:40 00:15:37.1263 +59:11:37.6332 G0178384 07:24:50 00:16:02.4991 +59:29:08.79 G0354798 07:25:59 00:16:41.8795 +61:02:41.0064 G1236761 07:27:08 00:16:55.019 +62:32:58.0488 G1104060 07:28:17 00:17:17.959 +62:50:17.9016 G0197398 07:29:27 00:19:02.5733 +63:03:57.7152 G1108946 07:30:36 00:19:38.0712 +62:25:39.9828 G0410793 07:31:47 00:21:19.2425 +63:18:59.4468 G0412316 07:32:57 00:23:11.5109 +63:14:27.8376 G1335438 07:34:06 00:24:22.8192 +63:29:54.6576 G0040683 07:35:18 00:25:05.8135 +62:09:01.3248 G1311682 07:36:27 00:28:01.1556 +61:13:34.5828 G1353194 07:37:34 00:28:32.2651 +62:25:30.162 G1411338 08:16:50 00:00:42.1697 +62:28:27.9912 G1437181 08:17:59 00:04:43.1198 +60:54:53.7408 G1376191 08:19:09 00:04:50.1787 +61:08:02.7816 G0915623 08:20:18 00:06:55.8847 +60:56:16.6632 G0040914 08:21:27 00:09:18.455 +60:52:27.1164 G0023757 08:22:37 00:10:06.7973 +61:36:45.864 G0960102 08:23:46 00:10:20.1641 +60:46:39.81 G0857314 08:25:08 00:11:03.7274 +59:44:23.334 G0286480 08:26:17 00:12:01.2106 +59:41:10.5108 G1256548 08:27:25 00:13:02.2044 +59:55:55.596 G0382218 08:28:35 00:15:37.1263 +59:11:37.6332 G0178384 08:29:44 00:16:02.4991 +59:29:08.79 G0354798 08:30:53 00:16:41.8795 +61:02:41.0064 G1236761 08:32:02 00:16:55.019 +62:32:58.0488 G1104060 08:33:12 00:17:17.959 +62:50:17.9016 G0197398 08:34:21 00:19:02.5733 +63:03:57.7152 G1108946 08:35:33 00:19:38.0712 +62:25:39.9828 G0410793 08:36:42 00:21:19.2425 +63:18:59.4468 G0412316 08:37:49 00:23:11.5109 +63:14:27.8376 G1335438 08:38:59 00:24:22.8192 +63:29:54.6576 G0040683 08:40:08 00:25:05.8135 +62:09:01.3248 G1353194 08:41:17 00:28:32.2651 +62:25:30.162 G0341361 08:42:26 00:28:34.0399 +61:37:03.1656 G0040540 08:43:38 00:32:50.7516 +64:01:35.1156 G1125714 08:44:47 00:33:18.3127 +61:27:43.344 G0195596 08:45:56 00:35:06.0497 +62:46:14.376 G0133562 08:47:08 00:35:47.389 +64:04:54.9552 G0083833 08:48:17 00:39:39.6461 +62:56:06.2232 G0304019 08:49:26 00:44:44.6424 +62:03:38.97 G0332087 08:50:48 00:45:19.158 +65:27:13.1436 G1232494 08:52:43 00:46:53.2234 +63:08:07.764 G0058140 08:53:53 00:49:35.4175 +64:51:58.608 G0026909 08:55:02 00:52:34.2317 +63:11:28.7484 G0215715 08:56:11 00:52:46.4971 +65:50:02.7564 G0211497 08:57:21 00:55:03.9209 +62:44:28.3308 G0463440 08:58:30 00:58:21.8878 +63:37:25.1796 G0107445 08:59:39 01:01:53.0525 +63:15:32.0112 G0414645 09:00:49 01:06:47.1456 +64:40:42.9204 G0297094 09:01:58 01:14:20.381 +63:43:33.4128 G0544341 09:03:07 01:15:33.0602 +63:37:00.0624 G0043239 09:04:17 01:18:36.6046 +63:48:39.78 G0858497 09:05:36 02:08:29.8543 +64:31:02.7048 G0461687 12:39:17 22:37:39.4555 +51:03:50.5224 G1468559 12:40:26 22:37:49.2626 +50:50:28.4928 G1369384 12:41:35 22:41:18.6254 +52:11:20.5224 G1286759 12:42:45 22:42:40.2319 +53:50:01.9716 G0329445 12:43:54 22:43:08.5181 +51:34:07.9464 G1187210 12:45:03 22:44:21.6871 +53:37:55.5168 G0518266 12:46:19 23:16:30.0146 +57:53:27.7872 G0464426 12:47:26 23:18:14.2603 +58:32:36.6108 G0417225 12:48:38 23:20:05.3686 +58:21:10.7064 G0894934 12:49:47 23:21:59.502 +57:00:07.4448 G0322333 12:50:56 23:27:15.4762 +58:45:09.7236 G0312471 12:52:08 23:30:53.401 +57:16:46.7184 G1042257 12:53:17 23:32:23.0126 +58:24:54.0576 G1074414 12:54:26 23:33:31.5746 +57:52:19.3836 G0085132 12:55:38 23:35:10.979 +59:34:58.7856 G0843567 12:56:47 23:36:16.4354 +58:41:06.7344 G0307552 12:57:56 23:37:05.4859 +59:24:34.956 G0218409 12:59:08 23:40:07.6903 +59:59:08.9016