TITLE: GCN CIRCULAR NUMBER: 27213 SUBJECT: LIGO/Virgo S200224ca: No counterpart candidates in KAIT observations DATE: 20/02/25 23:06:59 GMT FROM: Weikang Zheng at UC Berkeley Sergiy Vasylyev, Benjamin E. Stahl, Yukei Murakami, Andrew Hoffman, James Sunseri, Keto D. Zhang, Shaunak Modak, 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 S200224ca (GCN 27184) 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 77 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 05:01:26, Feb. 25th UT, about 6.7 hours after the trigger, and the last image at 09:29:37 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(Feb25) RA_J2000 Dec_J2000 ----------------------------------------------- G0673461 05:01:26 10:44:53.496 +12:35:05.892 G0698936 05:03:45 10:46:08.2543 +12:36:58.5792 G0629402 05:04:52 10:46:19.801 +12:37:19.56 G0806101 05:06:03 10:46:38.9429 +11:45:55.1124 G0518983 05:07:12 10:47:22.1998 +12:43:49.764 G0165487 05:08:21 10:48:17.6659 +13:54:41.58 G0400195 05:11:48 10:50:23.4156 +13:48:52.2252 G0259691 05:12:57 10:50:42.0482 +12:56:50.2152 G0782778 05:16:27 10:51:08.6683 +13:50:53.7324 G0654615 05:17:37 10:51:09.4445 +08:43:32.2752 G0679827 05:18:46 10:51:11.2975 +10:38:36.2796 G0787037 05:19:56 10:51:16.5161 +11:51:47.2824 G0619835 05:21:08 10:51:19.9915 +11:49:29.28 G0591424 05:22:17 10:51:29.4984 +10:41:08.4408 G0669021 05:26:59 10:51:43.3375 +10:45:24.4728 G0200654 05:28:09 10:51:46.8823 +08:46:31.476 G0583050 05:29:18 10:51:59.0551 +12:12:55.4868 G0556324 05:30:28 10:52:11.4074 +12:17:48.462 G1138356 05:31:37 10:52:32.9772 +10:36:20.5128 G0660070 05:32:46 10:52:48.241 +10:41:31.4772 G0626622 05:33:56 10:52:49.4347 +12:07:44.472 G0787922 05:35:05 10:52:59.4288 +10:12:38.772 G0628137 05:45:32 10:53:02.8565 +11:31:16.7772 G0296593 05:46:41 10:53:03.7097 +09:37:24.7764 G0709189 05:47:51 10:53:53.7487 +12:37:21.27 G0619660 05:49:00 10:54:09.1882 +12:33:24.2856 G0749789 05:50:09 10:54:17.19 +10:48:55.7316 G0841361 05:51:19 10:54:17.6844 +09:18:30.7332 G0828471 05:52:28 10:54:49.2773 +09:11:04.362 G0884104 05:53:37 10:54:59.8829 +09:11:26.3724 G1295231 05:54:46 10:55:00.8275 +12:02:53.3724 G0565461 05:55:56 10:55:23.4559 +11:18:59.256 G0549630 05:57:05 10:55:31.9044 +08:50:49.2648 G0093456 05:58:15 10:55:36.1524 +08:23:18.2688 G0569013 05:59:24 10:55:38.1408 +11:00:20.268 G0623088 06:00:34 10:55:53.6388 +15:20:27.3624 G0790896 06:01:43 10:56:06.8554 +10:58:22.6344 G0608596 06:02:53 10:56:15.487 +09:45:15.6168 G0280245 06:04:02 10:56:17.2303 +09:33:57.384 G1005344 06:05:16 10:56:39.4006 +07:07:20.4168 G0602699 06:06:25 10:56:44.0772 +09:45:32.4144 G0624595 06:07:34 10:56:44.1686 +07:09:04.4172 G1069807 06:08:44 10:57:07.2144 +10:20:32.892 G1163532 06:09:53 10:57:15.2381 +07:47:24.882 G1337604 06:11:02 10:57:23.5034 +08:49:37.1748 G0827745 06:12:12 10:57:31.8641 +08:17:56.1768 G1228502 06:13:21 20:11:20.7934 +69:57:42.7824 G0565601 08:55:53 10:59:10.1551 +07:48:32.2776 G0782794 08:57:02 10:59:18.175 +12:18:46.7856 G0743465 08:58:14 10:59:33.2189 +07:41:03.3288 G0682241 08:59:24 10:59:53.4706 +08:54:27.2052 G0791401 09:00:33 11:00:12.3888 +08:46:15.7584 G0797621 09:01:40 11:00:22.716 +08:20:17.7756 G0565575 09:02:50 11:00:31.4026 +07:16:16.7808 G0632512 09:03:59 11:00:33.6144 +06:12:13.7808 G0564972 09:05:08 11:00:40.8362 +07:13:24.7512 G0549831 09:06:17 11:01:01.9373 +07:16:50.7612 G0587079 09:07:27 11:02:43.7878 +05:22:52.5036 G0745333 09:08:36 11:05:26.3818 +03:17:33.0828 G0637766 09:09:50 11:06:38.1886 -02:43:10.2684 G0644398 09:11:01 11:07:28.6963 +03:48:08.9928 G0662623 09:12:10 11:08:03.9257 +02:00:13.7196 G0610069 09:13:20 11:08:21.731 +00:49:21.72 G0687196 09:14:29 11:08:43.7292 +00:27:27.5796 G0685235 09:15:38 11:09:46.2708 +00:48:49.2624 G0489553 09:16:48 11:09:48.5266 +01:25:23.2644 G0707360 09:17:57 11:10:33.3874 -00:34:58.2888 G0711373 09:19:06 11:11:00.5969 -00:53:34.7676 G0739801 09:20:18 11:11:16.3661 -06:16:03.3168 G0740915 09:21:29 11:11:16.9298 -00:49:27.75 G1052029 09:22:38 11:13:37.489 -01:57:20.5488 G0569482 09:23:48 11:14:00.6043 -00:20:11.1948 G0810723 09:25:00 11:14:39.1478 -05:18:24.5016 G1070206 09:26:09 11:14:42.1471 -03:48:51.5016 G0662104 09:27:19 11:15:57.8614 -02:10:14.304 G0203483 09:28:28 11:16:00.0074 -03:46:47.3052 G0726560 09:29:37 11:16:06.6761 -02:52:10.3008