TITLE: GCN CIRCULAR NUMBER: 24179 SUBJECT: LIGO/Virgo S190425z: Lick/KAIT Follow-Up Observations DATE: 19/04/25 13:12:40 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng, Keto Zhang, Sergiy Vasylyev 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 S190425z (GCN 24168) detected by LIGO/Virgo. More than one thousand galaxies were selected from the Glade catalog (V1.0) (http://aquarius.elte.hu/glade/) according to their priority score. KAIT observed 101 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 09:06:22, Apr. 25 UT, about 48 minutes after the trigger, and the last image at 12:43:52 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. 25) RA (J2000) Dec ----------------------------------------------- G0613278 09:06:22 16:56:00.440 -16:58:54.80 G0628454 09:07:32 16:51:59.390 -15:02:08.50 G0609502 09:08:41 16:54:11.660 -16:19:16.90 G0748918 09:09:52 16:55:11.420 -07:39:56.40 G0667530 09:11:04 16:50:28.100 -17:40:35.60 G0757013 09:12:17 17:00:09.120 -05:46:12.50 G0559558 09:13:28 16:53:14.560 -17:05:05.10 G0585341 09:14:45 17:36:45.540 -07:42:16.50 G0726908 09:16:01 16:58:16.410 -06:15:33.60 G1850976 09:17:15 16:59:15.230 -21:18:09.90 G0590730 09:18:29 16:47:04.560 -23:29:07.70 G0276771 09:19:52 16:10:41.090 +22:33:54.90 G1851040 09:21:09 16:50:55.320 +09:24:14.30 G1478254 09:22:28 16:59:14.830 -21:18:11.30 G0586459 09:23:46 17:01:57.300 -01:52:22.00 G0507438 09:25:13 14:49:14.020 +34:55:06.60 G0566010 09:26:40 16:58:00.170 -18:42:57.40 G0683517 09:28:03 15:48:33.540 +28:35:01.90 G0004443 09:29:25 16:50:10.830 -17:40:41.70 G0731963 09:30:41 16:43:02.640 -30:04:59.50 G0662464 09:32:07 15:41:23.410 +28:17:59.00 G0708649 09:33:21 16:35:15.560 +21:30:07.00 G1851754 09:34:33 16:25:27.940 +19:27:48.90 G0741008 09:35:51 17:03:03.210 -02:52:38.50 G0584664 09:37:02 16:53:57.180 +02:22:12.10 G0650210 09:38:14 16:59:27.080 -03:21:27.30 G0758227 09:39:23 17:01:49.730 -05:12:04.00 G0558432 09:40:54 14:25:08.900 +36:22:28.00 G0663901 09:42:19 15:42:41.990 +28:04:24.00 G0670888 09:43:43 16:51:40.710 -14:50:18.20 G1335365 09:45:21 16:50:29.870 +05:59:02.60 G1487455 09:46:40 16:48:32.800 -20:10:29.00 G1851713 09:48:00 16:04:43.040 +24:57:33.60 G0611033 09:49:21 17:23:59.070 +12:40:43.10 G0711803 09:50:36 16:49:18.270 +06:11:23.10 G0012977 09:51:53 16:12:20.000 +23:45:45.90 G0663460 09:53:02 16:15:48.000 +21:53:28.30 G0737278 09:54:12 16:18:57.820 +21:01:13.10 G0557323 09:55:25 16:48:32.110 +08:43:10.00 G0824857 09:56:39 16:10:54.830 +22:36:02.70 G0739581 09:57:48 16:05:48.750 +23:55:08.10 G0660247 09:59:13 16:43:04.750 -24:58:53.80 G0618875 10:00:51 16:52:18.760 -14:55:05.10 G0663276 10:02:15 15:41:36.340 +28:13:53.10 G0751587 10:03:24 15:37:46.100 +29:44:45.80 G0618341 10:04:57 12:25:58.470 +28:27:06.00 G0601575 10:06:38 17:22:45.260 -00:48:48.20 G0623602 10:07:56 16:25:05.890 +20:08:24.10 G0814957 10:09:12 15:46:17.560 +26:32:37.80 G0618315 10:10:24 16:09:40.390 +21:59:33.80 G0558317 10:11:35 15:48:25.170 +26:00:17.50 G0663689 10:12:50 16:26:30.500 +16:24:44.50 G0681192 10:14:00 16:26:42.480 +16:31:59.50 G0752198 10:15:16 17:04:28.120 -04:18:28.40 G0455861 10:16:35 16:17:53.830 +18:47:47.50 G0692311 10:17:46 16:05:24.260 +25:08:18.40 G0158036 10:19:08 15:32:24.450 +40:48:01.00 G0784470 10:20:38 12:33:40.290 +29:36:21.10 G0771147 10:22:20 16:58:44.220 +27:49:33.00 G0758446 10:23:41 15:53:10.080 +24:34:12.00 G0734770 10:25:14 12:36:06.560 +29:38:15.70 G0019288 10:26:37 14:30:49.240 +36:16:33.90 G0605492 10:28:04 16:13:21.730 +29:26:10.60 G0700806 10:29:39 12:16:35.990 +23:52:25.60 G0124335 10:31:21 17:05:50.250 -06:16:50.10 G0610913 10:32:30 17:07:51.900 -05:26:15.00 G0698486 10:34:15 15:56:34.510 +24:26:18.30 G0642511 10:36:00 16:08:29.500 +22:17:30.30 G0494340 10:37:31 14:17:19.150 +39:30:01.20 G0617925 10:39:06 17:06:04.150 -04:37:17.10 G0947437 10:40:49 12:42:40.510 +34:57:25.50 G0622172 10:42:29 16:52:32.920 -03:07:40.10 G0810215 10:43:41 17:11:22.040 -03:15:10.80 G0475468 10:44:54 16:50:21.360 -16:54:39.60 G0013985 10:46:41 16:52:24.580 -02:28:56.20 G0789194 10:48:03 16:29:18.110 +39:30:37.80 G0730444 10:49:41 13:36:05.390 +34:34:43.60 G0822150 10:51:18 17:23:18.040 +02:00:02.30 G1053682 10:52:27 17:06:00.430 -01:34:00.00 G0586726 10:53:49 16:04:49.280 +25:54:12.80 G1308107 10:55:43 17:43:53.840 -09:43:55.50 G0396851 10:56:59 17:02:23.190 +06:53:58.30 G0598298 10:58:48 17:34:27.070 -03:22:44.20 G0395107 11:00:40 16:05:18.810 +17:41:54.30 G1851796 11:01:57 17:01:39.100 +10:14:58.80 G0728968 11:03:31 14:18:00.840 +35:19:13.50 G0157871 11:05:03 16:51:04.200 +23:32:51.40 G0597368 11:07:16 13:33:38.920 +41:46:22.30 G0650943 11:09:10 16:22:09.820 +36:19:53.40 G0796244 11:10:19 16:25:49.280 +40:50:57.70 G0603545 12:25:59 17:28:53.300 +03:13:43.30 G0799222 12:27:11 17:44:20.570 -01:41:28.50 G1487440 12:28:28 16:33:24.450 -28:07:56.80 G0717723 12:29:58 16:15:09.240 +35:03:43.30 G0819110 12:31:07 16:07:12.140 +36:37:51.40 G0719827 12:32:31 17:09:42.030 +03:52:13.80 G0566209 12:33:46 16:42:10.440 +13:21:19.70 G0726358 12:35:04 17:14:45.210 -06:05:54.90 G1172942 12:36:13 17:10:39.300 -06:52:45.30 G0624001 12:41:50 17:13:35.090 -05:36:45.60 G0584919 12:43:52 16:29:45.830 +17:50:59.10