TITLE: GCN CIRCULAR NUMBER: 24160 SUBJECT: LIGO/Virgo S190421ar: Lick/KAIT Follow-Up Observations DATE: 19/04/23 20:11:52 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng, Keto Zhang, Sergiy Vasylyev, 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 field of the gravitational-wave event S190421ar (GCN 24141) detected by LIGO/Virgo. More than one thousand galaxies were selected from the Glade catalog (http://aquarius.elte.hu/glade/) according to their priority score. KAIT observed 159 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 03:52:11, Apr. 23 UT, about 30.2 hrs after the trigger, and the last image at 08:22:03 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(Apr. 23) RA (J2000) Dec G0799947 03:52:11 10:54:51.770 +16:44:52.30 G0777765 03:53:27 11:36:36.370 +13:34:26.90 G1614050 03:54:37 11:31:25.220 +09:02:54.50 G0662161 03:55:53 12:23:41.600 +05:31:46.10 G0670167 03:57:04 12:43:12.360 -02:15:10.40 G0569866 03:58:23 13:22:59.920 -27:44:31.80 G0791468 03:59:42 12:36:47.150 +03:05:42.70 G1851120 04:00:56 12:18:55.660 +00:19:43.20 G0895821 04:02:05 12:22:16.060 +04:31:33.30 G0783735 04:03:26 11:04:00.650 +17:13:36.30 G0729367 04:20:19 10:44:27.730 +18:57:32.10 G0003201 04:21:38 11:41:44.730 +22:20:22.20 G0705729 04:23:05 13:27:54.820 -31:29:40.90 G0748624 04:35:47 12:16:40.240 +08:01:36.90 G0750982 04:37:01 13:05:43.400 -12:54:42.70 G0694610 04:38:27 10:49:12.360 +19:50:19.20 G0704658 04:39:56 13:34:40.370 -31:46:12.20 G0685127 04:41:15 12:16:12.140 +04:27:24.80 G0623925 04:42:38 10:29:08.400 +20:40:19.80 G0707742 04:44:01 12:32:43.950 -01:07:01.70 G0745190 04:45:15 13:02:06.340 -08:16:15.40 G0679095 04:46:26 12:56:30.090 -13:44:37.80 G0830299 04:47:37 12:46:29.040 -05:12:22.80 G0707185 04:48:49 13:11:17.330 -14:38:04.60 G0745128 04:50:05 12:20:46.740 +12:18:53.30 G0571301 04:51:18 12:35:37.390 -02:25:40.20 G0594576 04:52:40 11:08:18.590 +15:45:30.50 G0584223 04:53:49 11:13:19.340 +16:29:39.00 G0824991 04:56:40 11:13:32.460 +15:58:13.30 G0671792 04:57:49 11:10:53.670 +13:33:34.70 G0807427 04:59:01 10:53:52.320 +16:52:55.50 G0592304 05:00:12 11:20:44.630 +13:51:29.30 G1377354 05:01:25 11:43:59.630 +12:58:40.30 G0398790 05:02:46 13:04:52.160 -16:39:23.90 G0949356 05:04:09 11:08:05.740 +18:11:46.70 G0697369 05:05:31 12:36:10.090 -00:19:38.50 G0632479 05:06:40 12:35:36.070 +01:48:20.80 G1285927 05:07:54 13:00:57.930 -12:05:43.80 G0715500 05:09:07 13:21:43.230 -26:45:59.60 G0752413 05:11:43 11:49:53.440 +11:08:12.10 G0615964 05:13:01 10:57:23.620 +16:29:20.40 G0793836 05:44:49 11:52:32.440 +04:59:38.90 G1299111 05:46:08 13:00:35.680 -16:03:57.40 G1002056 05:47:30 11:33:26.660 +13:53:39.30 G0751169 05:48:47 10:36:47.600 +20:36:18.50 G0549931 05:50:07 11:43:06.150 +08:52:23.30 G0552033 05:51:26 12:56:29.870 -07:52:21.40 G0700845 05:52:39 12:20:15.130 +05:09:47.10 G0648779 05:54:02 10:56:48.610 +14:45:44.70 G0677192 05:56:42 13:27:53.080 -27:14:38.30 G0642481 05:57:55 13:02:38.560 -13:47:46.40 G0765485 05:59:09 13:34:10.570 -22:41:53.20 G0652477 06:00:37 11:00:37.720 +16:28:17.80 G0637511 06:02:00 12:45:56.710 -00:08:55.00 G1257022 06:03:21 11:15:57.220 +16:43:57.60 G0699404 06:04:37 10:48:53.300 +19:47:28.90 G0802935 06:05:57 12:04:27.470 +08:15:45.70 G0798113 06:07:13 12:36:06.330 -00:57:54.90 G0689268 06:08:31 13:22:31.160 -30:48:31.80 G0283238 06:09:40 13:13:16.230 -29:27:48.50 G1884552 06:11:01 12:28:29.520 +08:43:06.50 G0747346 06:12:14 12:48:54.700 -03:43:57.30 G0008302 06:13:23 12:44:53.230 +00:03:40.50 G1183363 06:14:48 11:11:57.520 +13:33:45.70 G0586559 06:16:03 11:49:48.240 +09:53:18.60 G0486241 06:17:20 12:30:12.110 +00:42:40.40 G0822058 06:18:39 11:18:45.400 +14:49:20.30 G1226448 06:19:56 11:58:46.710 +08:12:05.60 G0659898 06:21:11 12:39:40.780 -03:04:20.30 G0398739 06:22:25 12:13:04.500 +13:05:53.40 G0847413 06:24:08 10:55:56.830 +17:36:17.60 G0572104 06:25:25 10:31:51.710 +19:37:36.30 G0667230 06:26:44 11:22:47.310 +11:37:57.20 G0807454 06:28:05 12:52:17.600 -05:35:46.10 G0751534 06:29:22 12:10:15.470 +05:29:04.70 G0620788 06:30:45 13:15:12.190 -33:52:27.60 G0704596 06:31:57 13:28:34.900 -31:29:23.50 G0773860 06:33:24 10:59:06.700 +17:01:17.60 G0623612 06:34:47 12:39:37.830 +01:22:02.30 G0711053 06:36:05 13:22:35.440 -26:44:58.10 G0704591 06:37:26 12:36:01.190 +01:41:32.40 G0560656 06:38:48 10:45:25.210 +18:23:09.10 G0767272 06:40:18 13:32:37.260 -33:02:07.80 G1383828 06:41:41 12:00:43.010 +08:31:29.30 G0695335 06:42:58 12:46:51.830 -08:31:54.40 G0642730 06:44:09 12:53:58.760 -02:35:01.20 G0775517 06:45:29 11:22:01.510 +15:22:34.80 G0610251 06:46:47 12:17:54.630 +08:15:07.80 G0714185 06:48:04 12:45:36.610 -12:05:58.30 G0783442 06:49:27 11:04:04.880 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