TITLE: GCN CIRCULAR NUMBER: 27160 SUBJECT: LIGO/Virgo S200219ac: No counterpart candidates in KAIT observations DATE: 20/02/21 05:14:25 GMT FROM: Weikang Zheng at UC Berkeley Sergiy Vasylyev, Yukei Murakami, Keto D. Zhang, 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 S200219ac (GCN 27130) 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 171 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 05:57:00, Feb. 20th UT, about 20.2 hours after the trigger, and the last image at 11:25:04 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(Feb20) RA_J2000 Dec_J2000 ----------------------------------------------- G0799947 05:57:00 10:53:50.2514 +16:51:02.2464 G0649933 05:58:17 11:08:43.374 +29:13:26.0544 G0735397 05:59:28 11:10:24.906 +28:42:29.7396 G0587168 06:00:37 11:11:09.6276 +32:26:25.3392 G0584961 06:01:46 11:12:06.7054 +30:40:41.2572 G0599663 06:02:58 11:12:11.3525 +30:43:52.2696 G0559035 06:04:07 11:12:50.658 +30:03:32.7348 G0655611 06:05:16 11:12:53.8915 +28:48:42.9804 G1190111 06:06:27 11:14:36.7382 +31:49:26.742 G0643832 06:07:37 11:15:13.1945 +29:16:15.888 G0712497 06:08:46 11:15:28.5974 +31:47:56.1444 G0576641 06:09:57 11:15:29.3518 +35:10:56.1324 G0717203 06:12:18 11:17:14.4067 +29:31:13.9872 G0825338 06:13:29 11:17:51.8957 +36:07:23.808 G0688170 06:14:39 11:18:21.936 +32:43:19.5852 G0429937 06:15:48 11:18:25.3968 +31:24:39.5784 G0686309 06:16:57 11:18:59.381 +27:54:07.0092 G0661792 06:18:07 11:19:34.5667 +29:10:59.3364 G1447142 06:19:16 11:19:40.0709 +31:14:47.2164 G0707521 06:20:25 11:19:56.4845 +29:47:37.0788 G0630891 06:21:37 11:20:22.4194 +35:04:15.8448 G0803255 06:22:46 11:20:27.1217 +35:47:06.8496 G0607406 06:23:57 11:20:39.1663 +29:41:22.3044 G1029522 06:26:16 11:21:35.4274 +35:23:24.5076 G1008494 06:27:25 11:21:36.5698 +35:23:14.5068 G0576646 06:28:34 11:21:50.3357 +32:45:53.4636 G1261996 06:29:44 11:21:54.5765 +36:41:48.768 G0564448 06:30:53 11:22:38.2654 +32:43:54.48 G0656201 06:48:55 11:22:56.5027 +34:06:41.508 G0568693 06:50:10 11:23:10.697 +31:12:24.9012 G0645403 06:51:19 11:23:11.4403 +29:35:53.9988 G0678301 06:52:29 11:23:18.6329 +31:40:55.9308 G0484305 06:54:48 11:23:48.131 +30:05:35.8188 G0619705 06:55:57 11:24:39.1517 +32:22:09.0156 G0609884 06:57:07 11:25:08.8512 +33:26:20.4936 G0650045 06:58:18 11:25:24.5434 +31:53:53.9484 G1212973 07:00:37 11:25:49.4604 +36:01:17.9328 G0803244 07:01:47 11:26:04.1638 +35:20:36.0852 G0639433 07:02:57 11:26:52.7417 +36:27:46.3788 G0606379 07:04:06 11:28:41.5942 +38:44:52.3788 G0771638 07:05:15 11:29:02.0654 +34:11:06.8964 G1466571 07:06:25 11:29:09.7082 +36:21:54.9 G0759844 07:07:34 11:29:37.5622 +34:11:58.974 G1328301 07:08:43 11:29:46.692 +31:59:16.4796 G0387004 07:11:02 11:30:03.9403 +36:41:29.5692 G0405129 07:12:11 11:30:06.1488 +35:38:18.5856 G0667795 07:13:23 11:30:08.789 +37:11:23.568 G0873979 07:14:32 11:31:24.3823 +34:30:12.3048 G0943763 07:15:41 11:31:36.3134 +38:47:58.2252 G0513348 07:16:52 11:31:44.1686 +34:32:28.1508 G0559829 07:18:02 11:32:37.9138 +37:34:21.1872 G0843763 07:19:11 11:32:40.7374 +38:52:18.1884 G0877949 07:20:20 11:32:59.2822 +38:55:00.498 G0577120 07:21:30 11:33:17.3657 +38:55:25.3812 G0220960 07:22:39 11:33:39.2102 +36:04:17.4504 G0582149 07:44:35 11:34:10.8106 +31:49:21.0144 G0685324 07:45:46 11:35:28.8355 +36:37:32.3616 G0358128 07:46:56 11:35:43.3961 +33:37:20.4708 G0579900 07:48:07 11:36:11.8397 +38:50:57.4944 G1429004 07:49:16 11:36:40.3822 +32:52:38.4312 G0766814 07:50:28 11:37:17.3803 +42:02:42.9828 G0574437 07:51:38 11:37:24.6715 +39:22:37.884 G0823835 07:52:47 11:38:20.2258 +35:37:21.6228 G1111405 07:53:56 11:38:37.3572 +34:45:44.6184 G0697353 07:55:08 11:38:46.1242 +38:51:34.4376 G0740234 07:56:17 11:39:56.9054 +33:56:28.3884 G0589912 07:57:27 11:41:36.0828 +35:54:45.0648 G0663100 07:58:40 11:41:56.1437 +41:24:38.8008 G0584956 07:59:49 11:44:27.1546 +37:08:31.5636 G1068712 08:01:00 11:47:33.6804 +42:08:39.1596 G0792658 08:02:10 11:48:36.2806 +40:23:21.2388 G0722649 08:03:20 11:55:40.6824 +43:48:40.302 G0612554 08:04:29 11:57:55.7995 +43:49:34.0536 G0781483 08:05:53 12:05:28.4143 +51:28:47.8596 G0701120 08:07:02 12:09:23.2507 +50:56:48.246 G0633275 08:08:13 12:13:49.7863 +55:35:17.5056 G0619306 08:09:23 12:15:11.316 +54:38:01.4748 G0707243 08:12:06 12:18:42.1838 +53:59:49.6608 G0777269 08:13:15 12:21:26.4442 +50:28:06.1536 G0774106 08:14:25 12:21:35.028 +50:27:09.108 G0578847 08:15:34 12:22:52.0423 +54:24:35.9712 G0673609 08:16:43 12:24:51.317 +50:49:39.0108 G0694431 08:17:55 12:25:42.4622 +57:51:58.8672 G0478899 08:19:04 12:25:50.1122 +57:50:35.88 G0619755 08:46:52 12:27:56.3671 +52:31:24.4164 G0822671 08:48:01 12:28:47.3914 +51:15:55.4112 G0701420 08:49:10 12:29:27.1253 +56:06:29.052 G0822038 08:50:20 12:30:04.043 +55:44:36.0096 G0722728 08:51:29 12:30:12.1363 +56:42:07.9812 G0574919 08:52:38 12:30:12.6379 +53:59:37.9716 G0811040 08:53:48 12:30:26.3014 +55:28:09.8328 G0367866 08:54:58 12:31:17.8308 +57:49:48.8172 G0687685 08:56:05 12:31:50.2625 +58:21:28.9296 G0562569 08:58:24 12:33:58.6378 +55:20:20.0328 G0672674 08:59:34 12:34:48.4351 +56:17:39.1776 G0749623 09:00:43 12:34:56.5906 +53:31:54.4764 G1904449 09:01:53 12:35:50.9326 +55:53:44.1312 G0809862 09:03:03 12:35:55.349 +55:56:43.1124 G0643126 09:04:13 12:36:17.6844 +54:42:30.8736 G0696080 09:05:22 12:36:17.8015 +56:54:30.8916 G0608536 09:06:33 12:36:46.333 +55:42:03.078 G0558994 09:07:42 12:37:21.0718 +57:15:22.1364 G1708956 09:08:52 12:37:22.56 +57:15:25.524 G0599908 09:10:03 12:37:58.9306 +55:35:45.4092 G0728556 09:11:12 12:38:15.1171 +53:03:04.4208 G0662281 09:12:22 12:38:38.8037 +55:23:06.3636 G0804583 09:13:31 12:39:11.6234 +53:19:19.704 G0596517 09:14:40 12:39:47.688 +55:46:03.0324 G0777685 09:16:04 12:39:54.3677 +61:12:41.4072 G0571045 09:17:29 12:41:32.1826 +53:52:57.4392 G0583138 09:18:39 12:41:43.3483 +56:47:06.5472 G0571067 09:19:48 12:41:44.557 +56:43:54.534 G0779598 09:21:11 12:42:23.7158 +60:08:04.8696 G0570567 09:49:06 12:42:39.1003 +61:41:09.4524 G0554983 09:50:30 12:43:00.9559 +56:43:50.5956 G0609572 09:51:43 12:43:12.7661 +56:03:27.6408 G0722161 09:53:03 12:43:19.7827 +58:57:53.6148 G1473071 09:54:20 12:43:24.624 +56:38:02.6016 G0575799 09:55:48 12:43:51.599 +62:30:25.9416 G0608648 09:57:16 12:46:17.2486 +56:36:55.0512 G0789419 09:58:27 12:46:30.6775 +57:17:00.096 G0800488 09:59:45 12:46:47.5488 +54:53:15.0432 G0598413 10:00:56 12:47:07.7599 +54:59:18.7188 G0598541 10:02:08 12:47:10.8802 +55:04:40.7424 G0086390 10:03:39 12:47:15.3991 +62:28:53.04 G0819560 10:05:13 12:47:24.2614 +54:59:13.7472 G0783845 10:06:46 12:48:03.0542 +62:36:33.2676 G0617510 10:08:20 12:48:26.9825 +55:27:34.0596 G0810253 10:09:52 12:48:39.9281 +62:37:03.18 G0556824 10:11:11 12:48:40.6054 +59:16:31.71 G0774007 10:12:39 12:48:41.8543 +55:03:44.712 G0701233 10:14:00 12:48:55.3894 +57:57:24.7896 G1437692 10:15:22 12:48:58.385 +55:02:07.7856 G0795970 10:16:39 12:49:09.8364 +56:36:28.764 G0688939 10:17:59 12:49:23.3386 +58:25:15.6612 G0566932 10:19:25 12:49:46.8238 +54:47:51.0972 G0420902 10:20:38 12:49:47.5342 +55:30:49.0968 G0710929 10:22:16 12:51:11.9093 +63:49:57.3708 G0418402 10:23:28 12:52:08.335 +62:53:11.6664 G0793753 10:25:00 12:53:19.032 +57:04:07.302 G0797074 10:26:17 12:53:57.9859 +58:17:38.2164 G0610297 10:27:43 12:54:17.4427 +55:11:51.1188 G0741937 10:29:19 12:54:57.4769 +61:27:10.7568 G0752137 10:50:49 12:55:36.7457 +60:10:57.6552 G0792093 10:52:08 12:55:53.1847 +58:19:49.2852 G1463818 10:53:26 12:55:58.3483 +59:06:51.2316 G0644569 10:54:45 12:55:58.7292 +62:08:48.5952 G0763378 10:56:05 12:56:08.0016 +58:45:23.9364 G0501647 10:57:43 12:56:14.3299 +56:52:24.4236 G0764293 10:59:28 12:56:42.0593 +63:05:15.72 G0820710 11:00:41 12:58:20.7715 +61:30:39.33 G0581776 11:01:56 13:01:00.9706 +59:50:56.4504 G0668949 11:03:14 13:01:50.31 +58:19:35.6736 G0767564 11:04:35 13:02:06.6065 +65:47:45.096 G0811935 11:05:50 13:02:32.6734 +61:28:02.118 G0767619 11:07:01 13:02:39.0307 +62:29:39.084 G0558303 11:08:19 13:15:12.257 +62:19:34.932 G0734489 11:09:32 13:27:54.4738 +65:50:30.5772 G1293606 11:10:53 15:11:17.1422 +72:42:43.8516 G0585517 11:12:04 15:26:34.5264 +75:04:16.23 G0496591 11:13:22 15:46:32.915 +72:10:09.0804 G0769048 11:14:31 15:52:28.5974 +70:22:30.522 G1325595 11:15:40 15:53:58.1398 +71:58:43.0392 G1306470 11:16:53 15:54:03.0799 +71:57:24.4044 G1295408 11:18:02 15:55:04.2334 +74:54:29.3112 G1236558 11:19:11 15:57:26.5392 +74:18:58.8708 G1361437 11:20:23 15:57:30.1428 +70:41:20.796 G1849594 11:21:32 15:57:30.48 +70:41:20.544 G0716651 11:22:41 16:01:25.8802 +71:23:55.6656 G1132485 11:23:51 16:10:49.4093 +74:55:02.2152 G0774750 11:25:04 16:44:36.8957 +75:40:23.088